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27 results on '"Hoormann, J. K."'

1. OzDES multi-object fibre spectroscopy for the Dark Energy Survey: Results and second data release

Author

Lidman, C., Tucker, B. E., Davis, T. M., Uddin, S. A., Asorey, J., Bolejko, K., Brout, D., Calcino, J., Carollo, D., Carr, A., Childress, M., Hoormann, J. K., Foley, R. J., Galbany, L., Glazebrook, K., Hinton, S. R., Kessler, R., Kim, A. G., King, A., Kremin, A., Kuehn, K., Lagattuta, D., Lewis, G. F., Macaulay, E., Malik, U., March, M., Martini, P., Möller, A., Mudd, D., Nichol, R. C., Panther, F., Parkinson, D., Pursiainen, M., Sako, M., Swann, E., Scalzo, R., Scolnic, D., Sharp, R., Smith, M., Sommer, N. E., Sullivan, M., Webb, S., Wiseman, P., Yu, Z., Yuan, F., Zhang, B., Abbott, T. M. C., Aguena, M., Allam, S., Annis, J., Avila, S., Bertin, E., Bhargava, S., Brooks, D., Rosell, A. Carnero, Kind, M. Carrasco, Carretero, J., Castander, F. J., Costanzi, M., da Costa, L. N., De Vicente, J., Doel, P., Eifler, T. F., Everett, S., Fosalba, P., Frieman, J., García-Bellido, J., Gaztanaga, E., Gruen, D., Gruendl, R. A., Gschwend, J., Gutierrez, G., Hartley, W. G., Hollowood, D. L., Honscheid, K., James, D. J., Kuropatkin, N., Li, T. S., Lima, M., Lin, H., Maia, M. A. G., Marshall, J. L., Melchior, P., Menanteau, F., Miquel, R., Palmese, A., Paz-Chinchón, F., Plazas, A. A., Roodman, A., Rykoff, E. S., Sanchez, E., Santiago, B., Scarpine, V., Schubnell, M., Serrano, S., Sevilla-Noarbe, I., Suchyta, E., Swanson, M. E. C., Tarle, G., Tucker, D. L., Varga, T. N., Walker, A. R., Wester, W., and Wilkinson, R. D.

Subjects
Astrophysics - Cosmology and Nongalactic Astrophysics, Astrophysics - Astrophysics of Galaxies
Abstract

We present a description of the Australian Dark Energy Survey (OzDES) and summarise the results from its six years of operations. Using the 2dF fibre positioner and AAOmega spectrograph on the 3.9-metre Anglo-Australian Telescope, OzDES has monitored 771 AGN, classified hundreds of supernovae, and obtained redshifts for thousands of galaxies that hosted a transient within the 10 deep fields of the Dark Energy Survey. We also present the second OzDES data release, containing the redshifts of almost 30,000 sources, some as faint as $r_{\mathrm AB}=24$ mag, and 375,000 individual spectra. These data, in combination with the time-series photometry from the Dark Energy Survey, will be used to measure the expansion history of the Universe out to $z\sim1.2$ and the masses of hundreds of black holes out to $z\sim4$. OzDES is a template for future surveys that combine simultaneous monitoring of targets with wide-field imaging cameras and wide-field multi-object spectrographs., Comment: 20 pages, 16 figures. Accepted for publication by MNRAS. Data release available at https://datacentral.org.au

Published
2020
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2. The first Hubble diagram and cosmological constraints using superluminous supernova

Author

Inserra, C., Sullivan, M., Angus, C. R., Macaulay, E., Nichol, R. C., Smith, M., Frohmaier, C., Gutiérrez, C. P., Vicenzi, M., Möller, A., Brout, D., Brown, P. J., Davis, T. M., D'Andrea, C. B., Galbany, L., Kessler, R., Kim, A. G., Pan, Y. -C., Pursiainen, M., Scolnic, D., Thomas, B. P., Wiseman, P., Abbott, T. M. C., Annis, J., Avila, S., Bertin, E., Brooks, D., Burke, D. L., Rosell, A. Carnero, Kind, M. Carrasco, Carretero, J., Castander, F. J., Cawthon, R., Desai, S., Diehl, H. T., Eifler, T. F., Finley, D. A., Flaugher, B., Fosalba, P., Frieman, J., Garcia-Bellido, J., Gaztanaga, E., Gerdes, D. W., Giannantonio, T., Gruen, D., Gruendl, R. A., Gschwend, J., Gutierrez, G., Hollowood, D. L., Honscheid, K., James, D. J., Krause, E., Kuehn, K., Kuropatkin, N., Li, T. S., Lidman, C., Lima, M., Maia, M. A. G., Marshall, J. L., Martini, P., Menanteau, F., Miquel, R., Malagón, A. A. Plazas, Romer, A. K., Roodman, A., Sako, M., Sanchez, E., Scarpine, V., Schubnell, M., Serrano, S., Sevilla-Noarbe, I., Soares-Santos, M., Sobreira, F., Suchyta, E., Swanson, M. E. C., Tarle, G., Thomas, D., Tucker, D. L., Vikram, V., Walker, A. R., Zhang, Y., Asorey, J., Calcino, J., Carollo, D., Glazebrook, K., Hinton, S. R., Hoormann, J. K., Lewis, G. F., Sharp, R., Swann, E., and Tucker, B. E.

Subjects
Astrophysics - Cosmology and Nongalactic Astrophysics, Astrophysics - High Energy Astrophysical Phenomena
Abstract

We present the first Hubble diagram of superluminous supernovae (SLSNe) out to a redshift of two, together with constraints on the matter density, $\Omega_{\rm M}$, and the dark energy equation-of-state parameter, $w(\equiv p/\rho)$. We build a sample of 20 cosmologically useful SLSNe~I based on light curve and spectroscopy quality cuts. We confirm the robustness of the peak decline SLSN~I standardization relation with a larger dataset and improved fitting techniques than previous works. We then solve the SLSN model based on the above standardisation via minimisation of the $\chi^2$ computed from a covariance matrix which includes statistical and systematic uncertainties. For a spatially flat $\Lambda$CDM cosmological model, we find $\Omega_{\rm M}=0.38^{+0.24}_{-0.19}$, with a rms of 0.27 mag for the residuals of the distance moduli. For a $w_0w_a$CDM cosmological model, the addition of SLSNe~I to a `baseline' measurement consisting of Planck temperature together with type Ia supernovae, results in a small improvement in the constraints of $w_0$ and $w_a$ of 4\%. We present simulations of future surveys with 868 and 492 SLSNe I (depending on the configuration used) and show that such a sample can deliver cosmological constraints in a flat $\Lambda$CDM model with the same precision (considering only statistical uncertainties) as current surveys that use type Ia supernovae, while providing a factor 2-3 improvement in the precision of the constraints on the time variation of dark energy, $w_0$ and $w_a$. This paper represents the proof-of-concept for superluminous supernova cosmology, and demonstrates they can provide an independent test of cosmology in the high-redshift ($z>1$) universe., Comment: 16 pages, 9 figures. MNRAS accepted

Published
2020
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3. CIV Black Hole Mass Measurements with the Australian Dark Energy Survey (OzDES)

Author

Hoormann, J. K., Martini, P., Davis, T. M., King, A., Lidman, C., Mudd, D., Sharp, R., Sommer, N. E., Tucker, B. E., Yu, Z., Allam, S., Asorey, J., Avila, S., Banerji, M., Brooks, D., Buckley-Geer, E., Burke, D. L., Calcino, J., Rosell, A. Carnero, Carollo, D., Kind, M. Carrasco, Carretero, J., Castander, F. J., Childress, M., De Vicente, J., Desai, S., Diehl, H. T., Doel, P., Flaugher, B., Fosalba, P., Frieman, J., García-Bellido, J., Gerdes, D. W., Gruen, D., Gutierrez, G., Hartley, W. G., Hinton, S. R., Hollowood, D. L., Honscheid, K., Hoyle, B., James, D. J., Krause, E., Kuehn, K., Kuropatkin, N., Lewis, G. F., Lima, M., Macaulay, E., Maia, M. A. G., Menanteau, F., Miller, C. J., Miquel, R., Möller, A., Plazas, A. A., Romer, A. K., Roodman, A., Sanchez, E., Scarpine, V., Schubnell, M., Serrano, . S., Sevilla-Noarbe, I., Smith, M., Smith, R. C., Soares-Santos, M., Sobreira, F., Suchyta, E., Swann, E., Swanson, M. E. C., Tarle, G., Uddin, S. A., and Collaboration, DES

Subjects
Astrophysics - Astrophysics of Galaxies
Abstract

Black hole mass measurements outside the local universe are critically important to derive the growth of supermassive black holes over cosmic time, and to study the interplay between black hole growth and galaxy evolution. In this paper we present two measurements of supermassive black hole masses from reverberation mapping (RM) of the broad CIV emission line. These measurements are based on multi-year photometry and spectroscopy from the Dark Energy Survey Supernova Program (DES-SN) and the Australian Dark Energy Survey (OzDES), which together constitute the OzDES RM Program. The observed reverberation lag between the DES continuum photometry and the OzDES emission-line fluxes is measured to be $358^{+126}_{-123}$ and $343^{+58}_{-84}$ days for two quasars at redshifts of $1.905$ and $2.593$ respectively. The corresponding masses of the two supermassive black holes are $4.4 \times 10^{9}$ and $3.3 \times 10^{9}$ M$_\odot$, which are among the highest-redshift and highest-mass black holes measured to date with RM studies. We use these new measurements to better determine the CIV radius$-$luminosity relationship for high-luminosity quasars, which is fundamental to many quasar black hole mass estimates and demographic studies., Comment: 15 pages, 12 figures Updated with minor revisions to match version accepted for publication by MNRAS. Results remain the same

Published
2019
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4. First Cosmology Results Using Type Ia Supernovae From the Dark Energy Survey: Survey Overview and Supernova Spectroscopy

Author

D'Andrea, C. B., Smith, M., Sullivan, M., Nichol, R. C., Thomas, R. C., Kim, A. G., Möller, A., Sako, M., Castander, F. J., Filippenko, A. V., Foley, R. J., Galbany, L., González-Gaitán, S., Kasai, E., Kirshner, R. P., Lidman, C., Scolnic, D., Brout, D., Davis, T. M., Gupta, R. R., Hinton, S. R., Kessler, R., Lasker, J., Macaulay, E., Wolf, R. C., Zhang, B., Asorey, J., Avelino, A., Bassett, B. A., Calcino, J., Carollo, D., Casas, R., Challis, P., Childress, M., Clocchiatti, A., Crawford, S., Glazebrook, K., Goldstein, D. A., Graham, M. L., Hoormann, J. K., Kuehn, K., Lewis, G. F., Mandel, K. S., Morganson, E., Muthukrishna, D., Nugent, P., Pan, Y. -C., Pursiainen, M., Sharp, R., Sommer, N. E., Swann, E., Tucker, B. E., Uddin, S. A., Wiseman, P., Zheng, W., Abbott, T. M. C., Annis, J., Avila, S., Bechtol, K., Bernstein, G. M., Bertin, E., Brooks, D., Burke, D. L., Rosell, A. Carnero, Kind, M. Carrasco, Carretero, J., Cunha, C. E., da Costa, L. N., Davis, C., De Vicente, J., Diehl, H. T., Eifler, T. F., Estrada, J., Frieman, J., García-Bellido, J., Gaztanaga, E., Gerdes, D. W., Gruen, D., Gruendl, R. A., Gschwend, J., Gutierrez, G., Hartley, W. G., Hollowood, D. L., Honscheid, K., Hoyle, B., James, D. J., Johnson, M. W. G., Johnson, M. D., Kuropatkin, N., Li, T. S., Lima, M., Maia, M. A. G., Marshall, J. L., Martini, P., Menanteau, F., Miller, C. J., Miquel, R., Neilsen, E., Ogando, R. L. C., Plazas, A. A., Romer, A. K., Sanchez, E., Scarpine, V., Schubnell, M., Serrano, S., Sevilla-Noarbe, I., Sobreira, F., Suchyta, E., Tarle, G., Tucker, D. L., and Wester, W.

Subjects
Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

We present spectroscopy from the first three seasons of the Dark Energy Survey Supernova Program (DES-SN). We describe the supernova spectroscopic program in full: strategy, observations, data reduction, and classification. We have spectroscopically confirmed 307 supernovae, including 251 type Ia supernovae (SNe Ia) over a redshift range of $0.017 < z < 0.85$. We determine the effective spectroscopic selection function for our sample, and use it to investigate the redshift-dependent bias on the distance moduli of SNe Ia we have classified. We also provide a full overview of the strategy, observations, and data products of DES-SN, which has discovered 12,015 likely supernovae during these first three seasons. The data presented here are used for the first cosmology analysis by DES-SN ('DES-SN3YR'), the results of which are given in DES Collaboration (2018a)., Comment: 25 pages, 14 figures, 8 tables. Submitted to AJ

Published
2018
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5. Quasar Accretion Disk Sizes from Continuum Reverberation Mapping in the DES Standard Star Fields

Author

Yu, Zhefu, Martini, Paul, Davis, T. M., Gruendl, R. A., Hoormann, J. K., Kochanek, C. S., Lidman, C., Mudd, D., Peterson, B. M., Wester, W., Allam, S., Annis, J., Asorey, J., Avila, S., Banerji, M., Bertin, E., Brooks, D., Buckley-Geer, E., Calcino, J., Rosell, A. Carnero, Carollo, D., Kind, M. Carrasco, Carretero, J., Cunha, C. E., D'Andrea, C. B., da Costa, L. N., De Vicente, J., Desai, S., Diehl, H. T., Doel, P., Eifler, T. F., Flaugher, B., Fosalba, P., Frieman, J., García-Bellido, J., Gaztanaga, E., Glazebrook, K., Gruen, D., Gschwend, J., Gutierrez, G., Hartley, W. G., Hinton, S. R., Hollowood, D. L., Honscheid, K., Hoyle, B., James, D. J., Kim, A. G., Krause, E., Kuehn, K., Kuropatkin, N., Lewis, G. F., Lima, M., Macaulay, E., Maia, M. A. G., Marshall, J. L., Menanteau, F., Miquel, R., Möller, A., Plazas, A. A., Romer, A. K., Sanchez, E., Scarpine, V., Schubnell, M., Serrano, S., Smith, M., Smith, R. C., Soares-Santos, M., Sobreira, F., Suchyta, E., Swann, E., Swanson, M. E. C., Tarle, G., Tucker, B. E., Tucker, D. L., and Vikram, V.

Subjects
Astrophysics - Astrophysics of Galaxies
Abstract

Measurements of the physical properties of accretion disks in active galactic nuclei are important for better understanding the growth and evolution of supermassive black holes. We present the accretion disk sizes of 22 quasars from continuum reverberation mapping with data from the Dark Energy Survey (DES) standard star fields and the supernova C fields. We construct continuum lightcurves with the \textit{griz} photometry that span five seasons of DES observations. These data sample the time variability of the quasars with a cadence as short as one day, which corresponds to a rest frame cadence that is a factor of a few higher than most previous work. We derive time lags between bands with both JAVELIN and the interpolated cross-correlation function method, and fit for accretion disk sizes using the JAVELIN Thin Disk model. These new measurements include disks around black holes with masses as small as $\sim10^7$ $M_{\odot}$, which have equivalent sizes at 2500\AA \, as small as $\sim 0.1$ light days in the rest frame. We find that most objects have accretion disk sizes consistent with the prediction of the standard thin disk model when we take disk variability into account. We have also simulated the expected yield of accretion disk measurements under various observational scenarios for the Large Synoptic Survey Telescope Deep Drilling Fields. We find that the number of disk measurements would increase significantly if the default cadence is changed from three days to two days or one day., Comment: 33 pages, 24 figures

Published
2018
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6. First Cosmology Results Using Type Ia Supernovae from the Dark Energy Survey: Effects of Chromatic Corrections to Supernova Photometry on Measurements of Cosmological Parameters

Author

Lasker, J., Kessler, R., Scolnic, D., Brout, D., D'Andrea, C. B., Davis, T. M., Hinton, S. R., Kim, A. G., Lidman, C., Macaulay, E., Möller, A., Sako, M., Smith, M., Sullivan, M., Asorey, J., Bassett, B. A., Burke, D. L., Calcino, J., Carollo, D., Childress, M., Frieman, J., Hoormann, J. K., Kasai, E., Li, T. S., March, M., Morganson, E., Rykoff, E. S., Swann, E., Tucker, B. E., Wester, W., Abbott, T. M. C., Allam, S., Annis, J., Avila, S., Bechtol, K., Bertin, E., Brooks, D., Rosell, A. Carnero, Kind, M. Carrasco, Carretero, J., Castander, F. J., da Costa, L. N., Davis, C., De Vicente, J., Diehl, H. T., Doel, P., Drlica-Wagner, A., Flaugher, B., Garcia-Bellido, J., Gaztanaga, E., Gruen, D., Gruendl, R. A., Gschwend, J., Gutierrez, G., Hollowood, D. L., Honscheid, K., James, D. J., Kent, S., Krause, E., Kron, R., Kuehn, K., Kuropatkin, N., Lima, M., Maia, M. A. G., Marshall, J. L., Martini, P., Menanteau, F., Miller, C. J., Miquel, R., Plazas, A. A., Sanchez, E., Scarpine, V., Sevilla-Noarbe, I., Smith, R. C., Soares-Santos, M., Sobreira, F., Suchyta, E., Swanson, M. E. C., Tarle, G., Tucker, D. L., and Walker, A. R.

Subjects
Astrophysics - Cosmology and Nongalactic Astrophysics, Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

Calibration uncertainties have been the leading systematic uncertainty in recent analyses using type Ia Supernovae (SNe Ia) to measure cosmological parameters. To improve the calibration, we present the application of Spectral Energy Distribution (SED)-dependent "chromatic corrections" to the supernova light-curve photometry from the Dark Energy Survey (DES). These corrections depend on the combined atmospheric and instrumental transmission function for each exposure, and they affect photometry at the 0.01 mag (1%) level, comparable to systematic uncertainties in calibration and photometry. Fitting our combined DES and low-z SN Ia sample with Baryon Acoustic Oscillation (BAO) and Cosmic Microwave Background (CMB) priors for the cosmological parameters $\Omega_{\rm m}$ (the fraction of the critical density of the universe comprised of matter) and w (the dark energy equation of state parameter), we compare those parameters before and after applying the corrections. We find the change in w and $\Omega_{\rm m}$ due to not including chromatic corrections are -0.002 and 0.000, respectively, for the DES-SN3YR sample with BAO and CMB priors, consistent with a larger DES-SN3YR-like simulation, which has a w-change of 0.0005 with an uncertainty of 0.008 and an $\Omega_{\rm m}$ change of 0.000 with an uncertainty of 0.002 . However, when considering samples on individual CCDs we find large redshift-dependent biases (approximately 0.02 in distance modulus) for supernova distances., Comment: 17 pages, 12 figures, submitted to MNRAS

Published
2018
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7. First Cosmology Results Using Type Ia Supernovae From the Dark Energy Survey: Analysis, Systematic Uncertainties, and Validation

Author

Brout, D., Scolnic, D., Kessler, R., D'Andrea, C. B., Davis, T. M., Gupta, R. R., Hinton, S. R., Kim, A. G., Lasker, J., Lidman, C., Macaulay, E., Möller, A., Nichol, R. C., Sako, M., Smith, M., Sullivan, M., Zhang, B., Andersen, P., Asorey, J., Avelino, A., Bassett, B. A., Brown, P., Calcino, J., Carollo, D., Challis, P., Childress, M., Clocchiatti, A., Filippenko, A. V., Foley, R. J., Galbany, L., Glazebrook, K., Hoormann, J. K., Kasai, E., Kirshner, R. P., Kuehn, K., Kuhlmann, S., Lewis, G. F., Mandel, K. S., March, M., Miranda, V., Morganson, E., Muthukrishna, D., Nugent, P., Palmese, A., Pan, Y. -C., Sharp, R., Sommer, N. E., Swann, E., Thomas, R. C., Tucker, B. E., Uddin, S. A., Wester, W., Abbott, T. M. C., Allam, S., Annis, J., Avila, S., Bechtol, K., Bernstein, G. M., Bertin, E., Brooks, D., Burke, D. L., Rosell, A. Carnero, Kind, M. Carrasco, Carretero, J., Castander, F. J., Cunha, C. E., da Costa, L. N., Davis, C., De Vicente, J., DePoy, D. L., Desai, S., Diehl, H. T., Doel, P., Drlica-Wagner, A., Eifler, T. F., Estrada, J., Fernandez, E., Flaugher, B., Fosalba, P., Frieman, J., García-Bellido, J., Gruen, D., Gruendl, R. A., Gutierrez, G., Hartley, W. G., Hollowood, D. L., Honscheid, K., Hoyle, B., James, D. J., Jarvis, M., Jeltema, T., Krause, E., Lahav, O., Li, T. S., Lima, M., Maia, M. A. G., Marriner, J., Marshall, J. L., Martini, P., Menanteau, F., Miller, C. J., Miquel, R., Ogando, R. L. C., Plazas, A. A., Romer, A. K., Roodman, A., Rykoff, E. S., Sanchez, E., Santiago, B., Scarpine, V., Schubnell, M., Serrano, S., Sevilla-Noarbe, I., Smith, R. C., Soares-Santos, M., Sobreira, F., Suchyta, E., Swanson, M. E. C., Tarle, G., Thomas, D., Troxel, M. A., Tucker, D. L., Vikram, V., Walker, A. R., and Zhang, Y.

Subjects
Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

We present the analysis underpinning the measurement of cosmological parameters from 207 spectroscopically classified type Ia supernovae (SNe Ia) from the first three years of the Dark Energy Survey Supernova Program (DES-SN), spanning a redshift range of 0.017<$z$<0.849. We combine the DES-SN sample with an external sample of 122 low-redshift ($z$<0.1) SNe Ia, resulting in a "DES-SN3YR" sample of 329 SNe Ia. Our cosmological analyses are blinded: after combining our DES-SN3YR distances with constraints from the Cosmic Microwave Background (CMB; Planck Collaboration 2016), our uncertainties in the measurement of the dark energy equation-of-state parameter, $w$, are .042 (stat) and .059 (stat+syst) at 68% confidence. We provide a detailed systematic uncertainty budget, which has nearly equal contributions from photometric calibration, astrophysical bias corrections, and instrumental bias corrections. We also include several new sources of systematic uncertainty. While our sample is <1/3 the size of the Pantheon sample, our constraints on $w$ are only larger by 1.4$\times$, showing the impact of the DES SN Ia light curve quality. We find that the traditional stretch and color standardization parameters of the DES SNe Ia are in agreement with earlier SN Ia samples such as Pan-STARRS1 and the Supernova Legacy Survey. However, we find smaller intrinsic scatter about the Hubble diagram (0.077 mag). Interestingly, we find no evidence for a Hubble residual step ( 0.007 $\pm$ 0.018 mag) as a function of host galaxy mass for the DES subset, in 2.4$\sigma$ tension with previous measurements. We also present novel validation methods of our sample using simulated SNe Ia inserted in DECam images and using large catalog-level simulations to test for biases in our analysis pipelines., Comment: 30 Pages, 18 Figures, 12 Tables. Submitted to ApJ. Comments welcome

Published
2018
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8. First Cosmological Results using Type Ia Supernovae from the Dark Energy Survey: Measurement of the Hubble Constant

Author

Macaulay, E., Nichol, R. C., Bacon, D., Brout, D., Davis, T. M., Zhang, B., Bassett, B. A., Scolnic, D., Möller, A., D'Andrea, C. B., Hinton, S. R., Kessler, R., Kim, A. G., Lasker, J., Lidman, C., Sako, M., Smith, M., Sullivan, M., Abbott, T. M. C., Allam, S., Annis, J., Asorey, J., Avila, S., Bechtol, K., Brooks, D., Brown, P., Burke, D. L., Calcino, J., Rosell, A. Carnero, Carollo, D., Kind, M. Carrasco, Carretero, J., Castander, F. J., Collett, T., Crocce, M., Cunha, C. E., da Costa, L. N., Davis, C., De Vicente, J., Diehl, H. T., Doel, P., Drlica-Wagner, A., Eifler, T. F., Estrada, J., Evrard, A. E., Filippenko, A. V., Finley, D. A., Flaugher, B., Foley, R. J., Fosalba, P., Frieman, J., Galbany, L., García-Bellido, J., Gaztanaga, E., Glazebrook, K., González-Gaitán, S., Gruen, D., Gruendl, R. A., Gschwend, J., Gutierrez, G., Hartley, W. G., Hollowood, D. L., Honscheid, K., Hoormann, J. K., Hoyle, B., Huterer, D., Jain, B., James, D. J., Jeltema, T., Kasai, E., Krause, E., Kuehn, K., Kuropatkin, N., Lahav, O., Lewis, G. F., Li, T. S., Lima, M., Lin, H., Maia, M. A. G., Marshall, J. L., Martini, P., Miquel, R., Nugent, P., Palmese, A., Pan, Y. -C., Plazas, A. A., Romer, A. K., Roodman, A., Sanchez, E., Scarpine, V., Schindler, R., Schubnell, M., Serrano, S., Sevilla-Noarbe, I., Sharp, R., Soares-Santos, M., Sobreira, F., Sommer, N. E., Suchyta, E., Swann, E., Swanson, M. E. C., Tarle, G., Thomas, D., Thomas, R. C., Tucker, B. E., Uddin, S. A., Vikram, V., Walker, A. R., and Wiseman, P.

Subjects
Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

We present an improved measurement of the Hubble constant (H_0) using the 'inverse distance ladder' method, which adds the information from 207 Type Ia supernovae (SNe Ia) from the Dark Energy Survey (DES) at redshift 0.018 < z < 0.85 to existing distance measurements of 122 low redshift (z < 0.07) SNe Ia (Low-z) and measurements of Baryon Acoustic Oscillations (BAOs). Whereas traditional measurements of H_0 with SNe Ia use a distance ladder of parallax and Cepheid variable stars, the inverse distance ladder relies on absolute distance measurements from the BAOs to calibrate the intrinsic magnitude of the SNe Ia. We find H_0 = 67.8 +/- 1.3 km s-1 Mpc-1 (statistical and systematic uncertainties, 68% confidence). Our measurement makes minimal assumptions about the underlying cosmological model, and our analysis was blinded to reduce confirmation bias. We examine possible systematic uncertainties and all are below the statistical uncertainties. Our H_0 value is consistent with estimates derived from the Cosmic Microwave Background assuming a LCDM universe (Planck Collaboration et al. 2018)., Comment: 15 pages, 5 figures, updated to match accepted version

Published
2018
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9. First Cosmology Results using Type Ia Supernovae from the Dark Energy Survey: Constraints on Cosmological Parameters

Author

Abbott, T. M. C., Allam, S., Andersen, P., Angus, C., Asorey, J., Avelino, A., Avila, S., Bassett, B. A., Bechtol, K., Bernstein, G. M., Bertin, E., Brooks, D., Brout, D., Brown, P., Burke, D. L., Calcino, J., Rosell, A. Carnero, Carollo, D., Kind, M. Carrasco, Carretero, J., Casas, R., Castander, F. J., Cawthon, R., Challis, P., Childress, M., Clocchiatti, A., Cunha, C. E., D'Andrea, C. B., da Costa, L. N., Davis, C., Davis, T. M., De Vicente, J., DePoy, D. L., Desai, S., Diehl, H. T., Doel, P., Drlica-Wagner, A., Eifler, T. F., Evrard, A. E., Fernandez, E., Filippenko, A. V., Finley, D. A., Flaugher, B., Foley, R. J., Fosalba, P., Frieman, J., Galbany, L., Garcia-Bellido, J., Gaztanaga, E., Giannantonio, T., Glazebrook, K., Goldstein, D. A., Gonzalez-Gaitan, S., Gruen, D., Gruendl, R. A., Gschwend, J., Gupta, R. R., Gutierrez, G., Hartley, W. G., Hinton, S. R., Hollowood, D. L., Honscheid, K., Hoormann, J. K., Hoyle, B., James, D. J., Jeltema, T., Johnson, M. W. G., Johnson, M. D., Kasai, E., Kent, S., Kessler, R., Kim, A. G., Kirshner, R. P., Kovacs, E., Krause, E., Kron, R., Kuehn, K., Kuhlmann, S., Kuropatkin, N., Lahav, O., Lasker, J., Lewis, G. F., Li, T. S., Lidman, C., Lima, M., Lin, H., Macaulay, E., Maia, M. A. G., Mandel, K. S., March, M., Marriner, J., Marshall, J. L., Martini, P., Menanteau, F., Miller, C. J., Miquel, R., Miranda, V., Mohr, J. J., Morganson, E., Muthukrishna, D., Möller, A., Neilsen, E., Nichol, R. C., Nord, B., Nugent, P., Ogando, R. L. C., Palmese, A., Pan, Y. -C., Plazas, A. A., Pursiainen, M., Romer, A. K., Roodman, A., Rozo, E., Rykoff, E. S., Sako, M., Sanchez, E., Scarpine, V., Schindler, R., Schubnell, M., Scolnic, D., Serrano, S., Sevilla-Noarbe, I., Sharp, R., Smith, M., Soares-Santos, M., Sobreira, F., Sommer, N. E., Spinka, H., Suchyta, E., Sullivan, M., Swann, E., Tarle, G., Thomas, D., Thomas, R. C., Troxel, M. A., Tucker, B. E., Uddin, S. A., Walker, A. R., Wester, W., Wiseman, P., Wolf, R. C., Yanny, B., Zhang, B., and Zhang, Y.

Subjects
Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

We present the first cosmological parameter constraints using measurements of type Ia supernovae (SNe Ia) from the Dark Energy Survey Supernova Program (DES-SN). The analysis uses a subsample of 207 spectroscopically confirmed SNe Ia from the first three years of DES-SN, combined with a low-redshift sample of 122 SNe from the literature. Our "DES-SN3YR" result from these 329 SNe Ia is based on a series of companion analyses and improvements covering SN Ia discovery, spectroscopic selection, photometry, calibration, distance bias corrections, and evaluation of systematic uncertainties. For a flat LCDM model we find a matter density Omega_m = 0.331 +_ 0.038. For a flat wCDM model, and combining our SN Ia constraints with those from the cosmic microwave background (CMB), we find a dark energy equation of state w = -0.978 +_ 0.059, and Omega_m = 0.321 +_ 0.018. For a flat w0waCDM model, and combining probes from SN Ia, CMB and baryon acoustic oscillations, we find w0 = -0.885 +_ 0.114 and wa = -0.387 +_ 0.430. These results are in agreement with a cosmological constant and with previous constraints using SNe Ia (Pantheon, JLA).

Published
2018
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10. First Cosmology Results using Type Ia Supernova from the Dark Energy Survey: Simulations to Correct Supernova Distance Biases

Author

Kessler, R., Brout, D., D'Andrea, C. B., Davis, T. M., Hinton, S. R., Kim, A. G., Lasker, J., Lidman, C., Macaulay, E., Möller, A., Sako, M., Scolnic, D., Smith, M., Sullivan, M., Zhang, B., Andersen, P., Asorey, J., Avelino, A., Calcino, J., Carollo, D., Challis, P., Childress, M., Clocchiatti, A., Crawford, S., Filippenko, A. V., Foley, R. J., Glazebrook, K., Hoormann, J. K., Kasai, E., Kirshner, R. P., Lewis, G. F., Mandel, K. S., March, M., Morganson, E., Muthukrishna, D., Nugent, P., Pan, Y. -C., Sommer, N. E., Swann, E., Thomas, R. C., Tucker, B. E., Uddin, S. A., Abbott, T. M. C., Allam, S., Annis, J., Avila, S., Banerji, M., Bechtol, K., Bertin, E., Brooks, D., Buckley-Geer, E., Burke, D. L., Rosell, A. Carnero, Kind, M. Carrasco, Carretero, J., Castander, F. J., Crocce, M., da Costa, L. N., Davis, C., De Vicente, J., Desai, S., Diehl, H. T., Doel, P., Eifler, T. F., Flaugher, B., Fosalba, P., Frieman, J., Garcia-Bellido, J., Gaztanaga, E., Gerdes, D. W., Gruen, D., Gruendl, R. A., Gutierrez, G., Hartley, W. G., Hollowood, D. L., Honscheid, K., James, D. J., Johnson, M. W. G., Johnson, M. D., Krause, E., Kuehn, K., Kuropatkin, N., Lahav, O., Li, T. S., Lima, M., Marshall, J. L., Martini, P., Menanteau, F., Miller, C. J., Miquel, R., Nord, B., Plazas, A. A., Roodman, A., Sanchez, E., Scarpine, V., Schindler, R., Schubnell, M., Serrano, S., Sevilla-Noarbe, I., Soares-Santos, M., Sobreira, F., Suchyta, E., Tarle, G., Thomas, D., Walker, A. R., and Zhang, Y.

Subjects
Astrophysics - Cosmology and Nongalactic Astrophysics, Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

We describe catalog-level simulations of Type Ia supernova (SN~Ia) light curves in the Dark Energy Survey Supernova Program (DES-SN), and in low-redshift samples from the Center for Astrophysics (CfA) and the Carnegie Supernova Project (CSP). These simulations are used to model biases from selection effects and light curve analysis, and to determine bias corrections for SN~Ia distance moduli that are used to measure cosmological parameters. To generate realistic light curves, the simulation uses a detailed SN~Ia model, incorporates information from observations (PSF, sky noise, zero point), and uses summary information (e.g., detection efficiency vs. signal to noise ratio) based on 10,000 fake SN light curves whose fluxes were overlaid on images and processed with our analysis pipelines. The quality of the simulation is illustrated by predicting distributions observed in the data. Averaging within redshift bins, we find distance modulus biases up to 0.05~mag over the redshift ranges of the low-z and DES-SN samples. For individual events, particularly those with extreme red or blue color, distance biases can reach 0.4~mag. Therefore, accurately determining bias corrections is critical for precision measurements of cosmological parameters. Files used to make these corrections are available at https://des.ncsa.illinois.edu/releases/sn.

Published
2018
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11. Cosmological Constraints from Multiple Probes in the Dark Energy Survey

Author

DES Collaboration, Abbott, T. M. C., Alarcon, A., Allam, S., Andersen, P., Andrade-Oliveira, F., Annis, J., Asorey, J., Avelino, A., Avila, S., Bacon, D., Banik, N., Bassett, B. A., Baxter, E., Bechtol, K., Becker, M. R., Bernstein, G. M., Bertin, E., Blazek, J., Bridle, S. L., Brooks, D., Brout, D., Burke, D. L., Calcino, J., Camacho, H., Campos, A., Rosell, A. Carnero, Carollo, D., Kind, M. Carrasco, Carretero, J., Castander, F. J., Cawthon, R., Challis, P., Chan, K. C., Chang, C., Childress, M., Clocchiatti, A., Crocce, M., Cunha, C. E., D'Andrea, C. B., da Costa, L. N., Davis, C., Davis, T. M., De Vicente, J., DePoy, D. L., DeRose, J., Desai, S., Diehl, H. T., Dietrich, J. P., Dodelson, S., Doel, P., Drlica-Wagner, A., Eifler, T. F., Elvin-Poole, J., Estrada, J., Evrard, A. E., Fernandez, E., Filippenko, A. V., Flaugher, B., Foley, R. J., Fosalba, P., Frieman, J., Galbany, L., García-Bellido, J., Gatti, M., Gaztanaga, E., Gerdes, D. W., Giannantonio, T., Glazebrook, K., Goldstein, D. A., Gruen, D., Gruendl, R. A., Gschwend, J., Gutierrez, G., Hartley, W. G., Hinton, S. R., Hollowood, D. L., Honscheid, K., Hoormann, J. K., Hoyle, B., Huterer, D., Jain, B., James, D. J., Jarvis, M., Jeltema, T., Kasai, E., Kent, S., Kessler, R., Kim, A. G., Kirshner, R. P., Kokron, N., Krause, E., Kron, R., Kuehn, K., Kuropatkin, N., Lahav, O., Lasker, J., Lemos, P., Lewis, G. F., Li, T. S., Lidman, C., Lima, M., Lin, H., Macaulay, E., MacCrann, N., Maia, M. A. G., Mandel, K. S., March, M., Marriner, J., Marshall, J. L., Martini, P., McMahon, R. G., Melchior, P., Menanteau, F., Miquel, R., Mohr, J. J., Morganson, E., Muir, J., Möller, A., Neilsen, E., Nichol, R. C., Nord, B., Ogando, R. L. C., Palmese, A., Pan, Y. -C., Peiris, H. V., Percival, W. J., Plazas, A. A., Porredon, A., Prat, J., Romer, A. K., Roodman, A., Rosenfeld, R., Ross, A. J., Rykoff, E. S., Samuroff, S., Sánchez, C., Sanchez, E., Scarpine, V., Schindler, R., Schubnell, M., Scolnic, D., Secco, L. F., Serrano, S., Sevilla-Noarbe, I., Sharp, R., Sheldon, E., Smith, M., Soares-Santos, M., Sobreira, F., Sommer, N. E., Swann, E., Swanson, M. E. C., Tarle, G., Thomas, D., Thomas, R. C., Troxel, M. A., Tucker, B. E., Uddin, S. A., Vielzeuf, P., Walker, A. R., Wang, M., Weaverdyck, N., Wechsler, R. H., Weller, J., Yanny, B., Zhang, B., Zhang, Y., and Zuntz, J.

Subjects
Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

The combination of multiple observational probes has long been advocated as a powerful technique to constrain cosmological parameters, in particular dark energy. The Dark Energy Survey has measured 207 spectroscopically--confirmed Type Ia supernova lightcurves; the baryon acoustic oscillation feature; weak gravitational lensing; and galaxy clustering. Here we present combined results from these probes, deriving constraints on the equation of state, $w$, of dark energy and its energy density in the Universe. Independently of other experiments, such as those that measure the cosmic microwave background, the probes from this single photometric survey rule out a Universe with no dark energy, finding $w=-0.80^{+0.09}_{-0.11}$. The geometry is shown to be consistent with a spatially flat Universe, and we obtain a constraint on the baryon density of $\Omega_b=0.069^{+0.009}_{-0.012}$ that is independent of early Universe measurements. These results demonstrate the potential power of large multi-probe photometric surveys and pave the way for order of magnitude advances in our constraints on properties of dark energy and cosmology over the next decade., Comment: 8 pages, 2 figures; v3 matches version accepted by PRL

Published
2018
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12. Rapidly evolving transients in the Dark Energy Survey

Author

Pursiainen, M., Childress, M., Smith, M., Prajs, S., Sullivan, M., Davis, T. M., Foley, R. J., Asorey, J., Calcino, J., Carollo, D., Curtin, C., D'Andrea, C. B., Glazebrook, K., Gutierrez, C., Hinton, S. R., Hoormann, J. K., Inserra, C., Kessler, R., King, A., Kuehn, K., Lewis, G. F., Lidman, C., Macaulay, E., Möller, A., Nichol, R. C., Sako, M., Sommer, N. E., Swann, E., Tucker, B. E., Uddin, S. A., Wiseman, P., Zhang, B., Abbott, T. M. C., Abdalla, F. B., Allam, S., Annis, J., Avila, S., Brooks, D., Buckley-Geer, E., Burke, D. L., Rosell, A. Carnero, Kind, M. Carrasco, Carretero, J., Castander, F. J., Cunha, C. E., Davis, C., De Vicente, J., Diehl, H. T., Doel, P., Eifler, T. F., Flaugher, B., Fosalba, P., Frieman, J., García-Bellido, J., Gruen, D., Gruendl, R. A., Gutierrez, G., Hartley, W. G., Hollowood, D. L., Honscheid, K., James, D. J., Jeltema, T., Kuropatkin, N., Li, T. S., Lima, M., Maia, M. A. G., Martini, P., Menanteau, F., Ogando, R. L. C., Plazas, A. A., Roodman, A., Sanchez, E., Scarpine, V., Schindler, R., Smith, R. C., Soares-Santos, M., Sobreira, F., Suchyta, E., Swanson, M. E. C., Tarle, G., Tucker, D. L., and Walker, A. R.

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

We present the results of a search for rapidly evolving transients in the Dark Energy Survey Supernova Programme. These events are characterized by fast light curve evolution (rise to peak in $\lesssim 10$ d and exponential decline in $\lesssim30$ d after peak). We discovered 72 events, including 37 transients with a spectroscopic redshift from host galaxy spectral features. The 37 events increase the total number of rapid optical transients by more than factor of two. They are found at a wide range of redshifts ($0.05M_\mathrm{g}>-22.25$). The multiband photometry is well fit by a blackbody up to few weeks after peak. The events appear to be hot ($T\approx10000-30000$ K) and large ($R\approx 10^{14}-2\cdot10^{15}$ cm) at peak, and generally expand and cool in time, though some events show evidence for a receding photosphere with roughly constant temperature. Spectra taken around peak are dominated by a blue featureless continuum consistent with hot, optically thick ejecta. We compare our events with a previously suggested physical scenario involving shock breakout in an optically thick wind surrounding a core-collapse supernova (CCSNe), we conclude that current models for such a scenario might need an additional power source to describe the exponential decline. We find these transients tend to favor star-forming host galaxies, which could be consistent with a core-collapse origin. However, more detailed modeling of the light curves is necessary to determine their physical origin., Comment: Accepted to MNRAS on 22.8.2018

Published
2018
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13. Dark Energy Survey Year 1 Results: Cross-Correlation Redshifts - Methods and Systematics Characterization

Author

Gatti, M., Vielzeuf, P., Davis, C., Cawthon, R., Rau, M. M., DeRose, J., De Vicente, J., Alarcon, A., Rozo, E., Gaztanaga, E., Hoyle, B., Miquel, R., Bernstein, G. M., Bonnett, C., Rosell, A. Carnero, Castander, F. J., Chang, C., da Costa, L. N., Gruen, D., Gschwend, J., Hartley, W. G., Lin, H., MacCrann, N., Maia, M. A. G., Ogando, R. L. C., Roodman, A., Sevilla-Noarbe, I., Troxel, M. A., Wechsler, R. H., Asorey, J., Davis, T. M., Glazebrook, K., Hinton, S. R., Lewis, G., Lidman, C., Macaulay, E., Möller, A., O'Neill, C. R., Sommer, N. E., Uddin, S. A., Yuan, F., Zhang, B., Abbott, T. M. C., Allam, S., Annis, J., Bechtol, K., Brooks, D., Burke, D. L., Carollo, D., Kind, M. Carrasco, Carretero, J., Cunha, C. E., D'Andrea, C. B., DePoy, D. L., Desai, S., Eifler, T. F., Evrard, A. E., Flaugher, B., Fosalba, P., Frieman, J., García-Bellido, J., Gerdes, D. W., Goldstein, D. A., Gruendl, R. A., Gutierrez, G., Honscheid, K., Hoormann, J. K., Jain, B., James, D. J., Jarvis, M., Jeltema, T., Johnson, M. W. G., Johnson, M. D., Krause, E., Kuehn, K., Kuhlmann, S., Kuropatkin, N., Li, T. S., Lima, M., Marshall, J. L., Melchior, P., Menanteau, F., Nichol, R. C., Nord, B., Plazas, A. A., Reil, K., Rykoff, E. S., Sako, M., Sanchez, E., Scarpine, V., Schubnell, M., Sheldon, E., Smith, M., Smith, R. C., Soares-Santos, M., Sobreira, F., Suchyta, E., Swanson, M. E. C., Tarle, G., Thomas, D., Tucker, B. E., Tucker, D. L., Vikram, V., Walker, A. R., Weller, J., Wester, W., and Wolf, R. C.

Subjects
Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

We use numerical simulations to characterize the performance of a clustering-based method to calibrate photometric redshift biases. In particular, we cross-correlate the weak lensing (WL) source galaxies from the Dark Energy Survey Year 1 (DES Y1) sample with redMaGiC galaxies (luminous red galaxies with secure photometric redshifts) to estimate the redshift distribution of the former sample. The recovered redshift distributions are used to calibrate the photometric redshift bias of standard photo-$z$ methods applied to the same source galaxy sample. We apply the method to three photo-$z$ codes run in our simulated data: Bayesian Photometric Redshift (BPZ), Directional Neighborhood Fitting (DNF), and Random Forest-based photo-$z$ (RF). We characterize the systematic uncertainties of our calibration procedure, and find that these systematic uncertainties dominate our error budget. The dominant systematics are due to our assumption of unevolving bias and clustering across each redshift bin, and to differences between the shapes of the redshift distributions derived by clustering vs photo-$z$'s. The systematic uncertainty in the mean redshift bias of the source galaxy sample is $\Delta z \lesssim 0.02$, though the precise value depends on the redshift bin under consideration. We discuss possible ways to mitigate the impact of our dominant systematics in future analyses., Comment: submitted to MNRAS

Published
2017
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14. OzDES multifibre spectroscopy for the Dark Energy Survey: Three year results and first data release

Author

Childress, M. J., Lidman, C., Davis, T. M., Tucker, B. E., Asorey, J., Yuan, F., Abbott, T. M. C., Abdalla, F. B., Allam, S., Annis, J., Banerji, M., Benoit-Levy, A., Bernard, S. R., Bertin, E., Brooks, D., Buckley-Geer, E., Burke, D. L., Rosell, A. Carnero, Carollo, D., Kind, M. Carrasco, Carretero, J., Castander, F. J., Cunha, C. E., da Costa, L. N., D'Andrea, C. B., Doel, P., Eifler, T. F., Evrard, A. E., Flaugher, B., Foley, R. J., Fosalba, P., Frieman, J., Garcia-Bellido, J., Glazebrook, K., Goldstein, D. A., Gruen, D., Gruendl, R. A., Gschwend, J., Gupta, R. R., Gutierrez, G., Hinton, S. R., Hoormann, J. K., James, D. J., Kessler, R., Kim, A. G., King, A. L., Kovacs, E., Kuehn, K., Kuhlmann, S., Kuropatkin, N., Lagattuta, D. J., Lewis, G. F., Li, T. S., Lima, M., Lin, H., Macaulay, E., Maia, M. A. G., Marriner, J., March, M., Marshall, J. L., Martini, P., McMahon, R. G., Menanteau, F., Miquel, R., Moller, A., Morganson, E., Mould, J., Mudd, D., Muthukrishna, D., Nichol, R. C., Nord, B., Ogando, R. L. C., Ostrovski, F., Parkinson, D., Plazas, A. A., Reed, S. L., Reil, K., Romer, A. K., Rykoff, E. S., Sako, M., Sanchez, E., Scarpine, V., Schindler, R., Schubnell, M., Scolnic, D., Sevilla-Noarbe, I., Seymour, N., Sharp, R., Smith, M., Soares-Santos, M., Sobreira, F., Sommer, N. E., Spinka, H., Suchyta, E., Sullivan, M., Swanson, M. E. C., Tarle, G., Uddin, S. A., Walker, A. R., Wester, W., and Zhang, B. R.

Subjects
Astrophysics - Cosmology and Nongalactic Astrophysics, Astrophysics - Astrophysics of Galaxies
Abstract

We present results for the first three years of OzDES, a six-year programme to obtain redshifts for objects in the Dark Energy Survey (DES) supernova fields using the 2dF fibre positioner and AAOmega spectrograph on the Anglo-Australian Telescope. OzDES is a multi-object spectroscopic survey targeting multiple types of targets at multiple epochs over a multi-year baseline, and is one of the first multi-object spectroscopic surveys to dynamically include transients into the target list soon after their discovery. At the end of three years, OzDES has spectroscopically confirmed almost 100 supernovae, and has measured redshifts for 17,000 objects, including the redshifts of 2,566 supernova hosts. We examine how our ability to measure redshifts for targets of various types depends on signal-to-noise, magnitude, and exposure time, finding that our redshift success rate increases significantly at a signal-to-noise of 2 to 3 per 1-Angstrom bin. We also find that the change in signal-to-noise with exposure time closely matches the Poisson limit for stacked exposures as long as 10 hours. We use these results to predict the redshift yield of the full OzDES survey, as well as the potential yields of future surveys on other facilities such as the 4m Multi-Object Spectroscopic Telescope (4MOST), the Subaru Prime Focus Spectrograph (PFS), and the Maunakea Spectroscopic Explorer (MSE). This work marks the first OzDES data release, comprising 14,693 redshifts. OzDES is on target to obtain over a yield of approximately 5,700 supernova host-galaxy redshifts., Comment: Accepted for publication in MNRAS. Redshift data release is available at http://www.mso.anu.edu.au/ozdes/DR1

Published
2017
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15. Dark Energy Survey Year 1 Results: Galaxy clustering for combined probes

Author

Elvin-Poole, J., Crocce, M., Ross, A. J., Giannantonio, T., Rozo, E., Rykoff, E. S., Avila, S., Banik, N., Blazek, J., Bridle, S. L., Cawthon, R., Drlica-Wagner, A., Friedrich, O., Kokron, N., Krause, E., MacCrann, N., Prat, J., Sanchez, C., Secco, L. F., Sevilla-Noarbe, I., Troxel, M. A., Abbott, T. M. C., Abdalla, F. B., Allam, S., Annis, J., Asorey, J., Bechtol, K., Becker, M. R., Benoit-Levy, A., Bernstein, G. M., Bertin, E., Brooks, D., Buckley-Geer, E., Burke, D. L., Rosell, A. Carnero, Carollo, D., Kind, M. Carrasco, Carretero, J., Castander, F. J., Cunha, C. E., DAndrea, C. B., da Costa, L. N., Davis, T. M., Davis, C., Desai, S., Diehl, H. T., Dietrich, J. P., Dodelson, S., Doel, P., Eifler, T. F., Evrard, A. E., Fernandez, E., Flaugher, B., Fosalba, P., Frieman, J., Garcia-Bellido, J., Gaztanaga, E., Gerdes, D. W., Glazebrook, K., Gruen, D., Gruendl, R. A., Gschwend, J., Gutierrez, G., Hartley, W. G., Hinton, S. R., Honscheid, K., Hoormann, J. K., Jain, B., James, D. J., Jarvis, M., Jeltema, T., Johnson, M. W. G., Johnson, M. D., King, A., Kuehn, K., Kuhlmann, S., Kuropatkin, N., Lahav, O., Lewis, G., Li, T. S., Lidman, C., Lima, M., Lin, H., Macaulay, E., March, M., Marshall, J. L., Martini, P., Melchior, P., Menanteau, F., Miquel, R., Mohr, J. J., Moller, A., Nichol, R. C., Nord, B., ONeill, C. R., Percival, W. J., Petravick, D., Plazas, A. A., Romer, A. K., Sako, M., Sanchez, E., Scarpine, V., Schindler, R., Schubnell, M., Sheldon, E., Smith, M., Smith, R. C., Soares-Santos, M., Sobreira, F., Sommer, N. E., Suchyta, E., Swanson, M. E. C., Tarle, G., Thomas, D., Tucker, B. E., Tucker, D. L., Uddin, S. A., Vikram, V., Walker, A. R., Wechsler, R. H., Weller, J., Wester, W., Wolf, R. C., Yuan, F., Zhang, B., and Zuntz, J.

Subjects
Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

We measure the clustering of DES Year 1 galaxies that are intended to be combined with weak lensing samples in order to produce precise cosmological constraints from the joint analysis of large-scale structure and lensing correlations. Two-point correlation functions are measured for a sample of $6.6 \times 10^{5}$ luminous red galaxies selected using the \textsc{redMaGiC} algorithm over an area of $1321$ square degrees, in the redshift range $0.15 < z < 0.9$, split into five tomographic redshift bins. The sample has a mean redshift uncertainty of $\sigma_{z}/(1+z) = 0.017$. We quantify and correct spurious correlations induced by spatially variable survey properties, testing their impact on the clustering measurements and covariance. We demonstrate the sample's robustness by testing for stellar contamination, for potential biases that could arise from the systematic correction, and for the consistency between the two-point auto- and cross-correlation functions. We show that the corrections we apply have a significant impact on the resultant measurement of cosmological parameters, but that the results are robust against arbitrary choices in the correction method. We find the linear galaxy bias in each redshift bin in a fiducial cosmology to be $b(z$=$0.24)=1.40 \pm 0.08$, $b(z$=$0.38)=1.61 \pm 0.05$, $b(z$=$0.53)=1.60 \pm 0.04$ for galaxies with luminosities $L/L_*>$$0.5$, $b(z$=$0.68)=1.93 \pm 0.05$ for $L/L_*>$$1$ and $b(z$=$0.83)=1.99 \pm 0.07$ for $L/L_*$$>1.5$, broadly consistent with expectations for the redshift and luminosity dependence of the bias of red galaxies. We show these measurements to be consistent with the linear bias obtained from tangential shear measurements., Comment: 20 pages, 13 figures. Version accepted by PRD, minor changes to text, covariance matrix updated, conclusions unchanged

Published
2017
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16. Dark Energy Survey Year 1 Results: Redshift distributions of the weak lensing source galaxies

Author

Hoyle, B., Gruen, D., Bernstein, G. M., Rau, M. M., De Vicente, J., Hartley, W. G., Gaztanaga, E., DeRose, J., Troxel, M. A., Davis, C., Alarcon, A., MacCrann, N., Prat, J., Sánchez, C., Sheldon, E., Wechsler, R. H., Asorey, J., Becker, M. R., Bonnett, C., Rosell, A. Carnero, Carollo, D., Kind, M. Carrasco, Castander, F. J., Cawthon, R., Chang, C., Childress, M., Davis, T. M., Drlica-Wagner, A., Gatti, M., Glazebrook, K., Gschwend, J., Hinton, S. R., Hoormann, J. K., Kim, A. G., King, A., Kuehn, K., Lewis, G., Lidman, C., Lin, H., Macaulay, E., Maia, M. A. G., Martini, P., Mudd, D., Möller, A., Nichol, R. C., Ogando, R. L. C., Rollins, R. P., Roodman, A., Ross, A. J., Rozo, E., Rykoff, E. S., Samuroff, S., Sevilla-Noarbe, I., Sharp, R., Sommer, N. E., Tucker, B. E., Uddin, S. A., Varga, T. N., Vielzeuf, P., Yuan, F., Zhang, B., Abbott, T. M. C., Abdalla, F. B., Allam, S., Annis, J., Bechtol, K., Benoit-Lévy, A., Bertin, E., Brooks, D., Buckley-Geer, E., Burke, D. L., Busha, M. T., Capozzi, D., Carretero, J., Crocce, M., D'Andrea, C. B., da Costa, L. N., DePoy, D. L., Desai, S., Diehl, H. T., Doel, P., Eifler, T. F., Estrada, J., Evrard, A. E., Fernandez, E., Flaugher, B., Fosalba, P., Frieman, J., García-Bellido, J., Gerdes, D. W., Giannantonio, T., Goldstein, D. A., Gruendl, R. A., Gutierrez, G., Honscheid, K., James, D. J., Jarvis, M., Jeltema, T., Johnson, M. W. G., Johnson, M. D., Kirk, D., Krause, E., Kuhlmann, S., Kuropatkin, N., Lahav, O., Li, T. S., Lima, M., March, M., Marshall, J. L., Melchior, P., Menanteau, F., Miquel, R., Nord, B., O'Neill, C. R., Plazas, A. A., Romer, A. K., Sako, M., Sanchez, E., Santiago, B., Scarpine, V., Schindler, R., Schubnell, M., Smith, M., Smith, R. C., Soares-Santos, M., Sobreira, F., Suchyta, E., Swanson, M. E. C., Tarle, G., Thomas, D., Tucker, D. L., Vikram, V., Walker, A. R., Weller, J., Wester, W., Wolf, R. C., Yanny, B., and Zuntz, J.

Subjects
Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

We describe the derivation and validation of redshift distribution estimates and their uncertainties for the galaxies used as weak lensing sources in the Dark Energy Survey (DES) Year 1 cosmological analyses. The Bayesian Photometric Redshift (BPZ) code is used to assign galaxies to four redshift bins between z=0.2 and 1.3, and to produce initial estimates of the lensing-weighted redshift distributions $n^i_{PZ}(z)$ for bin i. Accurate determination of cosmological parameters depends critically on knowledge of $n^i$ but is insensitive to bin assignments or redshift errors for individual galaxies. The cosmological analyses allow for shifts $n^i(z)=n^i_{PZ}(z-\Delta z^i)$ to correct the mean redshift of $n^i(z)$ for biases in $n^i_{\rm PZ}$. The $\Delta z^i$ are constrained by comparison of independently estimated 30-band photometric redshifts of galaxies in the COSMOS field to BPZ estimates made from the DES griz fluxes, for a sample matched in fluxes, pre-seeing size, and lensing weight to the DES weak-lensing sources. In companion papers, the $\Delta z^i$ are further constrained by the angular clustering of the source galaxies around red galaxies with secure photometric redshifts at 0.15

Published
2017
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17. First Cosmology Results using Supernovae Ia from the Dark Energy Survey: Survey Overview, Performance, and Supernova Spectroscopy

Author

Smith, M., primary, D’Andrea, C. B., additional, Sullivan, M., additional, Möller, A., additional, Nichol, R. C., additional, Thomas, R. C., additional, Kim, A. G., additional, Sako, M., additional, Castander, F. J., additional, Filippenko, A. V., additional, Foley, R. J., additional, Galbany, L., additional, González-Gaitán, S., additional, Kasai, E., additional, Kirshner, R. P., additional, Lidman, C., additional, Scolnic, D., additional, Brout, D., additional, Davis, T. M., additional, Gupta, R. R., additional, Hinton, S. R., additional, Kessler, R., additional, Lasker, J., additional, Macaulay, E., additional, Wolf, R. C., additional, Zhang, B., additional, Asorey, J., additional, Avelino, A., additional, Bassett, B. A., additional, Calcino, J., additional, Carollo, D., additional, Casas, R., additional, Challis, P., additional, Childress, M., additional, Clocchiatti, A., additional, Crawford, S., additional, Frohmaier, C., additional, Glazebrook, K., additional, Goldstein, D. A., additional, Graham, M. L., additional, Hoormann, J. K., additional, Kuehn, K., additional, Lewis, G. F., additional, Mandel, K. S., additional, Morganson, E., additional, Muthukrishna, D., additional, Nugent, P., additional, Pan, Y.-C., additional, Pursiainen, M., additional, Sharp, R., additional, Sommer, N. E., additional, Swann, E., additional, Thomas, B. P., additional, Tucker, B. E., additional, Uddin, S. A., additional, Wiseman, P., additional, Zheng, W., additional, Abbott, T. M. C., additional, Annis, J., additional, Avila, S., additional, Bechtol, K., additional, Bernstein, G. M., additional, Bertin, E., additional, Brooks, D., additional, Burke, D. L., additional, Rosell, A. Carnero, additional, Kind, M. Carrasco, additional, Carretero, J., additional, Cunha, C. E., additional, Costa, L. N. da, additional, Davis, C., additional, Vicente, J. De, additional, Diehl, H. T., additional, Eifler, T. F., additional, Estrada, J., additional, Frieman, J., additional, García-Bellido, J., additional, Gaztanaga, E., additional, Gerdes, D. W., additional, Gruen, D., additional, Gruendl, R. A., additional, Gschwend, J., additional, Gutierrez, G., additional, Hartley, W. G., additional, Hollowood, D. L., additional, Honscheid, K., additional, Hoyle, B., additional, James, D. J., additional, Johnson, M. W. G., additional, Johnson, M. D., additional, Kuropatkin, N., additional, Li, T. S., additional, Lima, M., additional, Maia, M. A. G., additional, March, M., additional, Marshall, J. L., additional, Martini, P., additional, Menanteau, F., additional, Miller, C. J., additional, Miquel, R., additional, Neilsen, E., additional, Ogando, R. L. C., additional, Plazas, A. A., additional, Romer, A. K., additional, Sanchez, E., additional, Scarpine, V., additional, Schubnell, M., additional, Serrano, S., additional, Sevilla-Noarbe, I., additional, Soares-Santos, M., additional, Sobreira, F., additional, Suchyta, E., additional, Tarle, G., additional, Tucker, D. L., additional, and Wester, W., additional

Published
2020
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18. Quasar Accretion Disk Sizes from Continuum Reverberation Mapping in the DES Standard-star Fields

Author

Yu, Zhefu, primary, Martini, Paul, additional, Davis, T. M., additional, Gruendl, R. A., additional, Hoormann, J. K., additional, Kochanek, C. S., additional, Lidman, C., additional, Mudd, D., additional, Peterson, B. M., additional, Wester, W., additional, Allam, S., additional, Annis, J., additional, Asorey, J., additional, Avila, S., additional, Banerji, M., additional, Bertin, E., additional, Brooks, D., additional, Buckley-Geer, E., additional, Calcino, J., additional, Rosell, A. Carnero, additional, Carollo, D., additional, Kind, M. Carrasco, additional, Carretero, J., additional, Cunha, C. E., additional, D’Andrea, C. B., additional, Costa, L. N. da, additional, De Vicente, J., additional, Desai, S., additional, Diehl, H. T., additional, Doel, P., additional, Eifler, T. F., additional, Flaugher, B., additional, Fosalba, P., additional, Frieman, J., additional, García-Bellido, J., additional, Gaztanaga, E., additional, Glazebrook, K., additional, Gruen, D., additional, Gschwend, J., additional, Gutierrez, G., additional, Hartley, W. G., additional, Hinton, S. R., additional, Hollowood, D. L., additional, Honscheid, K., additional, Hoyle, B., additional, James, D. J., additional, Kim, A. G., additional, Krause, E., additional, Kuehn, K., additional, Kuropatkin, N., additional, Lewis, G. F., additional, Lima, M., additional, Macaulay, E., additional, Maia, M. A. G., additional, Marshall, J. L., additional, Menanteau, F., additional, Miquel, R., additional, Möller, A., additional, Plazas, A. A., additional, Romer, A. K., additional, Sanchez, E., additional, Scarpine, V., additional, Schubnell, M., additional, Serrano, S., additional, Smith, M., additional, Smith, R. C., additional, Soares-Santos, M., additional, Sobreira, F., additional, Suchyta, E., additional, Swann, E., additional, Swanson, M. E. C., additional, Tarle, G., additional, Tucker, B. E., additional, Tucker, D. L., additional, and Vikram, V., additional

Published
2020
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19. First Cosmology Results Using Type Ia Supernovae From the Dark Energy Survey: Analysis, Systematic Uncertainties, and Validation

Author

Brout, D., Scolnic, D., Kessler, R., D'Andrea, C. B., Davis, T. M., Gupta, R. R., Hinton, S. R., Kim, A. G., Lasker, J., Lidman, C., Macaulay, E., M��ller, A., Nichol, R. C., Sako, M., Smith, M., Sullivan, M., Zhang, B., Andersen, P., Asorey, J., Avelino, A., Bassett, B. A., Brown, P., Calcino, J., Carollo, D., Challis, P., Childress, M., Clocchiatti, A., Filippenko, A. V., Foley, R. J., Galbany, L., Glazebrook, K., Hoormann, J. K., Kasai, E., Kirshner, R. P., Kuehn, K., Kuhlmann, S., Lewis, G. F., Mandel, K. S., March, M., Miranda, V., Morganson, E., Muthukrishna, D., Nugent, P., Palmese, A., Pan, Y. -C., Sharp, R., Sommer, N. E., Swann, E., Thomas, R. C., Tucker, B. E., Uddin, S. A., Wester, W., Abbott, T. M. C., Allam, S., Annis, J., Avila, S., Bechtol, K., Bernstein, G. M., Bertin, E., Brooks, D., Burke, D. L., Rosell, A. Carnero, Kind, M. Carrasco, Carretero, J., Castander, F. J., Cunha, C. E., da Costa, L. N., Davis, C., De Vicente, J., DePoy, D. L., Desai, S., Diehl, H. T., Doel, P., Drlica-Wagner, A., Eifler, T. F., Estrada, J., Fernandez, E., Flaugher, B., Fosalba, P., Frieman, J., Garc��a-Bellido, J., Gruen, D., Gruendl, R. A., Gutierrez, G., Hartley, W. G., Hollowood, D. L., Honscheid, K., Hoyle, B., James, D. J., Jarvis, M., Jeltema, T., Krause, E., Lahav, O., Li, T. S., Lima, M., Maia, M. A. G., Marriner, J., Marshall, J. L., Martini, P., Menanteau, F., Miller, C. J., Miquel, R., Ogando, R. L. C., Plazas, A. A., Romer, A. K., Roodman, A., Rykoff, E. S., Sanchez, E., Santiago, B., Scarpine, V., Schubnell, M., Serrano, S., Sevilla-Noarbe, I., Smith, R. C., Soares-Santos, M., Sobreira, F., Suchyta, E., Swanson, M. E. C., Tarle, G., Thomas, D., Troxel, M. A., Tucker, D. L., Vikram, V., Walker, A. R., Zhang, Y., Institut d'Astrophysique de Paris (IAP), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), and DES

Subjects
Cosmology and Nongalactic Astrophysics (astro-ph.CO), Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Astrophysics::Solar and Stellar Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Astrophysics::Galaxy Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

We present the analysis underpinning the measurement of cosmological parameters from 207 spectroscopically classified type Ia supernovae (SNe Ia) from the first three years of the Dark Energy Survey Supernova Program (DES-SN), spanning a redshift range of 0.017, Comment: 30 Pages, 18 Figures, 12 Tables. Submitted to ApJ. Comments welcome

Published
2019

20. C IV black hole mass measurements with the Australian Dark Energy Survey (OzDES)

Author

Hoormann, J K, Martini, Paul, Davis, T. M., King, Andrew D., Lidman, Christopher, Mudd, Dale, Sharp, Robert, Sommer, Natalia, Tucker, Bradley, Yu, Z., Allam, Sahar, Asorey, J., Avila, S, Banerji, Manda, Möller, Anais, Hoormann, J K, Martini, Paul, Davis, T. M., King, Andrew D., Lidman, Christopher, Mudd, Dale, Sharp, Robert, Sommer, Natalia, Tucker, Bradley, Yu, Z., Allam, Sahar, Asorey, J., Avila, S, Banerji, Manda, and Möller, Anais

Abstract

Black hole mass measurements outside the local Universe are critically important to derive the growth of supermassive black holes over cosmic time, and to study the interplay between black hole growth and galaxy evolution. In this paper, we present two measurements of supermassive black hole masses from reverberation mapping (RM) of the broad C IV emission line. These measurements are based on multiyear photometry and spectroscopy from the Dark Energy Survey Supernova Program (DES-SN) and the Australian Dark Energy Survey (OzDES), which together constitute the OzDES RM Program. The observed reverberation lag between the DES continuum photometry and the OzDES emission line fluxes is measured to be 358+126−123 and 343+58−84 d for two quasars at redshifts of 1.905 and 2.593, respectively. The corresponding masses of the two supermassive black holes are 4.4 × 109 and 3.3 × 109 M⊙, which are among the highest redshift and highest mass black holes measured to date with RM studies. We use these new measurements to better determine the C IV radius−luminosity relationship for high-luminosity quasars, which is fundamental to many quasar black hole mass estimates and demographic studies.

Published
2019

21. First Cosmology Results Using SNe Ia from the Dark Energy Survey: Analysis, Systematic Uncertainties, and Validation

Author

Brout, D., Scolnic, D., Kessler, R., D'Andrea, C. B., Davis, T. M., Gupta, R. R., Hinton, S. R., Kim, A. G., Lasker, J., Lidman, C., Macaulay, E., Moller, A., Nichol, R. C., Sako, M., Smith, M., Sullivan, M., Zhang, B., Andersen, P., Asorey, J., Avelino, A., Bassett, B. A., Brown, P., Calcino, J., Carollo, D., Challis, P., Childress, M., Clocchiatti, A., Filippenko, A., V, Foley, R. J., Galbany, L., Glazebrook, K., Hoormann, J. K., Kasai, E., Kirshner, R. P., Kuehn, K., Kuhlmann, S., Lewis, G. F., Mandel, K. S., March, M., Miranda, V, Morganson, E., Muthukrishna, D., Nugent, P., Palmese, A., Pan, Y-C, Sharp, R., Sommer, N. E., Swann, E., Thomas, R. C., Tucker, B. E., Uddin, S. A., Wester, W., Abbott, T. M. C., Allam, S., Annis, J., Avila, S., Bechtol, K., Bernstein, G. M., Bertin, E., Brooks, D., Burke, D. L., Carnero Rosell, A., Kind, M. Carrasco, Carretero, J., Castander, F. J., Cunha, C. E., da Costa, L. N., Davis, C., De Vicente, J., DePoy, D. L., Desai, S., Diehl, H. T., Doel, P., Drlica-Wagner, A., Eifler, T. F., Estrada, J., Fernandez, E., Flaugher, B., Fosalba, P., Frieman, J., Garcia-Bellido, J., Gruen, D., Gruendl, R. A., Gutierrez, G., Hartley, W. G., Hollowood, D. L., Honscheid, K., Hoyle, B., James, D. J., Jarvis, M., Jeltema, T., Krause, E., Lahav, O., Li, T. S., Lima, M., Maia, M. A. G., Marriner, J., Marshall, J. L., Martini, P., Menanteau, F., Miller, C. J., Miquel, R., Ogando, R. L. C., Plazas, A. A., Romer, A. K., Roodman, A., Rykoff, E. S., Sanchez, E., Santiago, B., Scarpine, V, Schubnell, M., Serrano, S., Sevilla-Noarbe, I, Smith, R. C., Soares-Santos, M., Sobreira, F., Suchyta, E., Swanson, M. E. C., Tarle, G., Thomas, D., Troxel, M. A., Tucker, D. L., Vikram, V., Walker, A. R., Zhang, Y., Brout, D., Scolnic, D., Kessler, R., D'Andrea, C. B., Davis, T. M., Gupta, R. R., Hinton, S. R., Kim, A. G., Lasker, J., Lidman, C., Macaulay, E., Moller, A., Nichol, R. C., Sako, M., Smith, M., Sullivan, M., Zhang, B., Andersen, P., Asorey, J., Avelino, A., Bassett, B. A., Brown, P., Calcino, J., Carollo, D., Challis, P., Childress, M., Clocchiatti, A., Filippenko, A., V, Foley, R. J., Galbany, L., Glazebrook, K., Hoormann, J. K., Kasai, E., Kirshner, R. P., Kuehn, K., Kuhlmann, S., Lewis, G. F., Mandel, K. S., March, M., Miranda, V, Morganson, E., Muthukrishna, D., Nugent, P., Palmese, A., Pan, Y-C, Sharp, R., Sommer, N. E., Swann, E., Thomas, R. C., Tucker, B. E., Uddin, S. A., Wester, W., Abbott, T. M. C., Allam, S., Annis, J., Avila, S., Bechtol, K., Bernstein, G. M., Bertin, E., Brooks, D., Burke, D. L., Carnero Rosell, A., Kind, M. Carrasco, Carretero, J., Castander, F. J., Cunha, C. E., da Costa, L. N., Davis, C., De Vicente, J., DePoy, D. L., Desai, S., Diehl, H. T., Doel, P., Drlica-Wagner, A., Eifler, T. F., Estrada, J., Fernandez, E., Flaugher, B., Fosalba, P., Frieman, J., Garcia-Bellido, J., Gruen, D., Gruendl, R. A., Gutierrez, G., Hartley, W. G., Hollowood, D. L., Honscheid, K., Hoyle, B., James, D. J., Jarvis, M., Jeltema, T., Krause, E., Lahav, O., Li, T. S., Lima, M., Maia, M. A. G., Marriner, J., Marshall, J. L., Martini, P., Menanteau, F., Miller, C. J., Miquel, R., Ogando, R. L. C., Plazas, A. A., Romer, A. K., Roodman, A., Rykoff, E. S., Sanchez, E., Santiago, B., Scarpine, V, Schubnell, M., Serrano, S., Sevilla-Noarbe, I, Smith, R. C., Soares-Santos, M., Sobreira, F., Suchyta, E., Swanson, M. E. C., Tarle, G., Thomas, D., Troxel, M. A., Tucker, D. L., Vikram, V., Walker, A. R., and Zhang, Y.

Published
2019

22. First Cosmology Results using Type Ia Supernovae from the Dark Energy Survey: Constraints on Cosmological Parameters

Author

Abbott, T. M. C., Allam, S., Andersen, P., Angus, C., Asorey, J., Avelino, A., Avila, S., Bassett, B. A., Bechtol, K., Bernstein, G. M., Bertin, E., Brooks, D., Brout, D., Brown, P., Burke, D. L., Calcino, J., Carnero Rosell, A., Carollo, D., Kind, M. Carrasco, Carretero, J., Casas, R., Castander, F. J., Cawthon, R., Challis, P., Childress, M., Clocchiatti, A., Cunha, C. E., D'Andrea, C. B., da Costa, L. N., Davis, C., Davis, T. M., De Vicente, J., DePoy, D. L., Desai, S., Diehl, H. T., Doel, P., Drlica-Wagner, A., Eifler, T. F., Evrard, A. E., Fernandez, E., Filippenko, A., V, Finley, D. A., Flaugher, B., Foley, R. J., Fosalba, P., Frieman, J., Galbany, L., Garcia-Bellido, J., Gaztanaga, E., Giannantonio, T., Glazebrook, K., Goldstein, D. A., Gonzalez-Gaitan, S., Gruen, D., Gruendl, R. A., Gschwend, J., Gupta, R. R., Gutierrez, G., Hartley, W. G., Hinton, S. R., Hollowood, D. L., Honscheid, K., Hoormann, J. K., Hoyle, B., James, D. J., Jeltema, T., Johnson, M. W. G., Johnson, M.D., Kasai, E., Kent, S., Kessler, R., Kim, A. G., Kirshner, R. P., Kovacs, E., Krause, E., Kron, R., Kuehn, K., Kuhlmann, S., Kuropatkin, N., Lahav, O., Lasker, J., Lewis, G. F., Li, T. S., Lidman, C., Lima, M., Lin, H., Macaulay, E., Maia, M. A. G., Mandel, K. S., March, M., Marriner, J., Marshall, J. L., Martini, P., Menanteau, F., Miller, C. J., Miquel, R., Miranda, V, Mohr, J. J., Morganson, E., Muthukrishna, D., Moller, A., Neilsen, E., Nichol, R. C., Nord, B., Nugent, P., Ogando, R. L. C., Palmese, A., Pan, Y-C, Plazas, A. A., Pursiainen, M., Romer, A. K., Roodman, A., Rozo, E., Rykoff, E. S., Sako, M., Sanchez, E., Scarpine, V, Schindler, R., Schubnell, M., Scolnic, D., Serrano, S., Sevilla-Noarbe, I, Sharp, R., Smith, M., Soares-Santos, M., Sobreira, F., Sommer, N. E., Spinka, H., Suchyta, E., Sullivan, M., Swann, E., Tarle, G., Thomas, D., Thomas, R. C., Troxel, M. A., Tucker, B. E., Uddin, S. A., Walker, A. R., Wester, W., Wiseman, P., Wolf, R. C., Yanny, B., Zhang, B., Zhang, Y., Abbott, T. M. C., Allam, S., Andersen, P., Angus, C., Asorey, J., Avelino, A., Avila, S., Bassett, B. A., Bechtol, K., Bernstein, G. M., Bertin, E., Brooks, D., Brout, D., Brown, P., Burke, D. L., Calcino, J., Carnero Rosell, A., Carollo, D., Kind, M. Carrasco, Carretero, J., Casas, R., Castander, F. J., Cawthon, R., Challis, P., Childress, M., Clocchiatti, A., Cunha, C. E., D'Andrea, C. B., da Costa, L. N., Davis, C., Davis, T. M., De Vicente, J., DePoy, D. L., Desai, S., Diehl, H. T., Doel, P., Drlica-Wagner, A., Eifler, T. F., Evrard, A. E., Fernandez, E., Filippenko, A., V, Finley, D. A., Flaugher, B., Foley, R. J., Fosalba, P., Frieman, J., Galbany, L., Garcia-Bellido, J., Gaztanaga, E., Giannantonio, T., Glazebrook, K., Goldstein, D. A., Gonzalez-Gaitan, S., Gruen, D., Gruendl, R. A., Gschwend, J., Gupta, R. R., Gutierrez, G., Hartley, W. G., Hinton, S. R., Hollowood, D. L., Honscheid, K., Hoormann, J. K., Hoyle, B., James, D. J., Jeltema, T., Johnson, M. W. G., Johnson, M.D., Kasai, E., Kent, S., Kessler, R., Kim, A. G., Kirshner, R. P., Kovacs, E., Krause, E., Kron, R., Kuehn, K., Kuhlmann, S., Kuropatkin, N., Lahav, O., Lasker, J., Lewis, G. F., Li, T. S., Lidman, C., Lima, M., Lin, H., Macaulay, E., Maia, M. A. G., Mandel, K. S., March, M., Marriner, J., Marshall, J. L., Martini, P., Menanteau, F., Miller, C. J., Miquel, R., Miranda, V, Mohr, J. J., Morganson, E., Muthukrishna, D., Moller, A., Neilsen, E., Nichol, R. C., Nord, B., Nugent, P., Ogando, R. L. C., Palmese, A., Pan, Y-C, Plazas, A. A., Pursiainen, M., Romer, A. K., Roodman, A., Rozo, E., Rykoff, E. S., Sako, M., Sanchez, E., Scarpine, V, Schindler, R., Schubnell, M., Scolnic, D., Serrano, S., Sevilla-Noarbe, I, Sharp, R., Smith, M., Soares-Santos, M., Sobreira, F., Sommer, N. E., Spinka, H., Suchyta, E., Sullivan, M., Swann, E., Tarle, G., Thomas, D., Thomas, R. C., Troxel, M. A., Tucker, B. E., Uddin, S. A., Walker, A. R., Wester, W., Wiseman, P., Wolf, R. C., Yanny, B., Zhang, B., and Zhang, Y.

Published
2019

23. First cosmology results using Type Ia supernova from the Dark Energy Survey:simulations to correct supernova distance biases

Author

Kessler, R., Brout, D., D'Andrea, C. B., Davis, T. M., Hinton, S. R., Kim, A. G., Lasker, J., Lidman, C., Macaulay, E., Möller, A., Sako, M., Scolnic, D., Smith, M., Sullivan, M., Zhang, B., Andersen, P., Asorey, J., Avelino, A., Calcino, J., Carollo, D., Challis, P., Childress, M., Clocchiatti, A., Crawford, S., Filippenko, A. V., Foley, R. J., Glazebrook, K., Hoormann, J. K., Kasai, E., Kirshner, R. P., Lewis, G. F., Mandel, K. S., March, M., Morganson, E., Muthukrishna, D., Nugent, P., Pan, Y. -C., Sommer, N. E., Swann, E., Thomas, R. C., Tucker, B. E., Uddin, S. A., Abbott, T. M. C., Allam, S., Annis, J., Avila, S., Banerji, M., Bechtol, K., Bertin, E., Brooks, D., Buckley-Geer, E., Burke, D. L., Carnero Rosell, A., Kind, M. Carrasco, Carretero, J., Castander, F. J., Crocce, M., da Costa, L. N., Davis, C., De Vicente, J., Desai, S., Diehl, H. T., Doel, P., Eifler, T. F., Flaugher, B., Fosalba, P., Frieman, J., Garcia-Bellido, J., Gaztanaga, E., Gerdes, D. W., Gruen, D., Gruendl, R. A., Gutierrez, G., Hartley, W. G., Hollowood, D. L., Honscheid, K., James, D. J., Johnson, M.D., Krause, E., Kuehn, K., Kuropatkin, N., Lahav, O., Li, T. S., Lima, M., Marshall, J. L., Martini, P., Menanteau, F., Miller, C. J., Miquel, R., Nord, B., Plazas, A. A., Roodman, A., Sanchez, E., Scarpine, V., Schindler, R., Schubnell, M., Serrano, S., Sevilla-Noarbe, I., Soares-Santos, M., Sobreira, F., Suchyta, E., Tarle, G., Thomas, D., Walker, A. R., Zhang, Y., Kessler, R., Brout, D., D'Andrea, C. B., Davis, T. M., Hinton, S. R., Kim, A. G., Lasker, J., Lidman, C., Macaulay, E., Möller, A., Sako, M., Scolnic, D., Smith, M., Sullivan, M., Zhang, B., Andersen, P., Asorey, J., Avelino, A., Calcino, J., Carollo, D., Challis, P., Childress, M., Clocchiatti, A., Crawford, S., Filippenko, A. V., Foley, R. J., Glazebrook, K., Hoormann, J. K., Kasai, E., Kirshner, R. P., Lewis, G. F., Mandel, K. S., March, M., Morganson, E., Muthukrishna, D., Nugent, P., Pan, Y. -C., Sommer, N. E., Swann, E., Thomas, R. C., Tucker, B. E., Uddin, S. A., Abbott, T. M. C., Allam, S., Annis, J., Avila, S., Banerji, M., Bechtol, K., Bertin, E., Brooks, D., Buckley-Geer, E., Burke, D. L., Carnero Rosell, A., Kind, M. Carrasco, Carretero, J., Castander, F. J., Crocce, M., da Costa, L. N., Davis, C., De Vicente, J., Desai, S., Diehl, H. T., Doel, P., Eifler, T. F., Flaugher, B., Fosalba, P., Frieman, J., Garcia-Bellido, J., Gaztanaga, E., Gerdes, D. W., Gruen, D., Gruendl, R. A., Gutierrez, G., Hartley, W. G., Hollowood, D. L., Honscheid, K., James, D. J., Johnson, M.D., Krause, E., Kuehn, K., Kuropatkin, N., Lahav, O., Li, T. S., Lima, M., Marshall, J. L., Martini, P., Menanteau, F., Miller, C. J., Miquel, R., Nord, B., Plazas, A. A., Roodman, A., Sanchez, E., Scarpine, V., Schindler, R., Schubnell, M., Serrano, S., Sevilla-Noarbe, I., Soares-Santos, M., Sobreira, F., Suchyta, E., Tarle, G., Thomas, D., Walker, A. R., and Zhang, Y.

Published
2019

24. OzDES multi-object fibre spectroscopy for the Dark Energy Survey: results and second data release.

Author

Lidman, C, Tucker, B E, Davis, T M, Uddin, S A, Asorey, J, Bolejko, K, Brout, D, Calcino, J, Carollo, D, Carr, A, Childress, M, Hoormann, J K, Foley, R J, Galbany, L, Glazebrook, K, Hinton, S R, Kessler, R, Kim, A G, King, A, and Kremin, A

Abstract

We present a description of the Australian Dark Energy Survey (OzDES) and summarize the results from its 6 years of operations. Using the 2dF fibre positioner and AAOmega spectrograph on the 3.9-m Anglo-Australian Telescope, OzDES has monitored 771 active galactic nuclei, classified hundreds of supernovae, and obtained redshifts for thousands of galaxies that hosted a transient within the 10 deep fields of the Dark Energy Survey. We also present the second OzDES data release, containing the redshifts of almost 30 000 sources, some as faint as r AB = 24 mag, and 375 000 individual spectra. These data, in combination with the time-series photometry from the Dark Energy Survey, will be used to measure the expansion history of the Universe out to z ∼ 1.2 and the masses of hundreds of black holes out to z ∼ 4. OzDES is a template for future surveys that combine simultaneous monitoring of targets with wide-field imaging cameras and wide-field multi-object spectrographs. [ABSTRACT FROM AUTHOR]

Published
2020
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25. Dark Energy Survey Year 1 results: cross-correlation redshifts – methods and systematics characterization

Author

Gatti, M, primary, Vielzeuf, P, additional, Davis, C, additional, Cawthon, R, additional, Rau, M M, additional, DeRose, J, additional, De Vicente, J, additional, Alarcon, A, additional, Rozo, E, additional, Gaztanaga, E, additional, Hoyle, B, additional, Miquel, R, additional, Bernstein, G M, additional, Bonnett, C, additional, Carnero Rosell, A, additional, Castander, F J, additional, Chang, C, additional, da Costa, L N, additional, Gruen, D, additional, Gschwend, J, additional, Hartley, W G, additional, Lin, H, additional, MacCrann, N, additional, Maia, M A G, additional, Ogando, R L C, additional, Roodman, A, additional, Sevilla-Noarbe, I, additional, Troxel, M A, additional, Wechsler, R H, additional, Asorey, J, additional, Davis, T M, additional, Glazebrook, K, additional, Hinton, S R, additional, Lewis, G, additional, Lidman, C, additional, Macaulay, E, additional, Möller, A, additional, O'Neill, C R, additional, Sommer, N E, additional, Uddin, S A, additional, Yuan, F, additional, Zhang, B, additional, Abbott, T M C, additional, Allam, S, additional, Annis, J, additional, Bechtol, K, additional, Brooks, D, additional, Burke, D L, additional, Carollo, D, additional, Carrasco Kind, M, additional, Carretero, J, additional, Cunha, C E, additional, D'Andrea, C B, additional, DePoy, D L, additional, Desai, S, additional, Eifler, T F, additional, Evrard, A E, additional, Flaugher, B, additional, Fosalba, P, additional, Frieman, J, additional, García-Bellido, J, additional, Gerdes, D W, additional, Goldstein, D A, additional, Gruendl, R A, additional, Gutierrez, G, additional, Honscheid, K, additional, Hoormann, J K, additional, Jain, B, additional, James, D J, additional, Jarvis, M, additional, Jeltema, T, additional, Johnson, M W G, additional, Johnson, M D, additional, Krause, E, additional, Kuehn, K, additional, Kuhlmann, S, additional, Kuropatkin, N, additional, Li, T S, additional, Lima, M, additional, Marshall, J L, additional, Melchior, P, additional, Menanteau, F, additional, Nichol, R C, additional, Nord, B, additional, Plazas, A A, additional, Reil, K, additional, Rykoff, E S, additional, Sako, M, additional, Sanchez, E, additional, Scarpine, V, additional, Schubnell, M, additional, Sheldon, E, additional, Smith, M, additional, Smith, R C, additional, Soares-Santos, M, additional, Sobreira, F, additional, Suchyta, E, additional, Swanson, M E C, additional, Tarle, G, additional, Thomas, D, additional, Tucker, B E, additional, Tucker, D L, additional, Vikram, V, additional, Walker, A R, additional, Weller, J, additional, Wester, W, additional, and Wolf, R C, additional

Published
2018
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26. OzDES Reverberation Mapping Program: Lag recovery reliability for 6-year CIV analysis

Author

G. Tarle, Maria E. S. Pereira, E. Suchyta, R. D. Wilkinson, Daniela Carollo, I. Ferrero, A. Carnero Rosell, Samuel Hinton, J. Gschwend, Tim Eifler, Kyler Kuehn, M. E. C. Swanson, G. Gutierrez, Juan Garcia-Bellido, J. Carretero, Tamara M. Davis, Rob Sharp, Sunayana Bhargava, David J. Brooks, Antonella Palmese, M. A. G. Maia, M. Smith, D. L. Hollowood, Daniel Gruen, J. K. Hoormann, C. Lidman, B. E. Tucker, S. Serrano, Jennifer L. Marshall, A. K. Romer, Daniel Scolnic, Paul Martini, Josh Frieman, Enrique Gaztanaga, Anais Möller, E. Bertin, S. A. Uddin, D. W. Gerdes, J. Calcino, David J. James, A. A. Plazas, H. T. Diehl, David Bacon, A. Penton, A. G. Kim, Pablo Fosalba, M. Carrasco Kind, Ramon Miquel, M. Costanzi, K. Honscheid, J. Annis, J. De Vicente, W. C. Wester, S. Everett, S. Allam, Robert A. Gruendl, F. Paz-Chinchón, Felipe Menanteau, V. Scarpine, U. Malik, Chun-Hao To, Michel Aguena, E. J. Sanchez, Jacobo Asorey, N. Kuropatkin, Zhefu Yu, T. N. Varga, L. N. da Costa, Robert Morgan, Institut d'Astrophysique de Paris (IAP), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique de Clermont (LPC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne (UCA), DES, Penton, A, Malik, U, Davis, T M, Martini, P, Yu, Z, Sharp, R, Lidman, C, Tucker, B E, Hoormann, J K, Aguena, M, Allam, S, Annis, J, Asorey, J, Bacon, D, Bertin, E, Bhargava, S, Brooks, D, Calcino, J, Carnero&nbsp, Rosell, A, Carollo, D, Carrasco&nbsp, Kind, M, Carretero, J, Costanzi, M, da&nbsp, Costa, L N, Pereira, M E S, De&nbsp, Vicente, J, Diehl, H T, Eifler, T F, Everett, S, Ferrero, I, Fosalba, P, Frieman, J, García-Bellido, J, Gaztanaga, E, Gerdes, D W, Gruen, D, Gruendl, R A, Gschwend, J, Gutierrez, G, Hinton, S R, Hollowood, D L, Honscheid, K, James, D J, Kim, A G, Kuehn, K, Kuropatkin, N, Maia, M A G, Marshall, J L, Menanteau, F, Miquel, R, Morgan, R, Möller, A, Palmese, A, Paz-Chinchón, F, Plazas, A A, Romer, A K, Sanchez, E, Scarpine, V, Scolnic, D, Serrano, S, Smith, M, Suchyta, E, Swanson, M E C, Tarle, G, To, C, Uddin, S A, Varga, T N, Wester, W, Wilkinson, R D, Lewis, G, National Science Foundation (US), Ministerio de Ciencia e Innovación (España), Generalitat de Catalunya, European Commission, Instituto Nacional de Ciência e Tecnologia (Brasil), and UAM. Departamento de Física Teórica

Subjects
galaxies: active, quasars: emission lines, quasars: general, Astrophysics - Astrophysics of Galaxies, Lag, FOS: Physical sciences, 01 natural sciences, emission lines [Quasars], statistical analysis, (Galaxies:) Quasars: Emission Lines, 0103 physical sciences, quasar, silver, AGN, 010303 astronomy & astrophysics, Reliability (statistics), Physics, [PHYS]Physics [physics], general [quasars], 010308 nuclear & particles physics, ) Quasars: Emission Lines [(Galaxies], Física, Astronomy and Astrophysics, gold, (Galaxies:) Quasars: Supermassive Black Holes, Nuclei, Reliability engineering, emission line [quasars], Space and Planetary Science, quality, Astrophysics of Galaxies (astro-ph.GA), active [galaxies], slope, Reverberation mapping, dispersion, galaxy, statistical, ) Quasars: Supermassive Black Holes [(Galaxies]
Abstract

Penton, A. et al (DES Collaboration), We present the statistical methods that have been developed to analyse the OzDES reverberation mapping sample. To perform this statistical analysis we have created a suite of customizable simulations that mimic the characteristics of each source in the OzDES sample. These characteristics include: the variability in the photometric and spectroscopic light curves, the measurement uncertainties, and the observational cadence. By simulating the sources in the OzDES sample that contain the C iv emission line, we developed a set of criteria that rank the reliability of a recovered time-lag depending on the agreement between different recovery methods, the magnitude of the uncertainties, and the rate at which false positives were found in the simulations. These criteria were applied to simulated light curves and these results used to estimate the quality of the resulting Radius-Luminosity relation. We grade the results using three quality levels (gold, silver, and bronze). The input slope of the R-L relation was recovered within 1σ for each of the three quality samples, with the gold standard having the lowest dispersion with a recovered a R-L relation slope of 0.454 ± 0.016 with an input slope of 0.47. Future work will apply these methods to the entire OzDES sample of 771 AGN., The DES data management system is supported by the National Science Foundation under Grant Numbers AST-1138766 and AST-1536171. The DES participants from Spanish institutions are partially supported by MICINN under grants ESP2017-89838, PGC2018-094773, PGC2018-102021, SEV-2016-0588, SEV-2016-0597, and MDM-2015-0509, some of which include ERDF funds from the European Union. IFAE is partially funded by the CERCA program of the Generalitat de Catalunya. Research leading to these results has received funding from the European Research Council under the European Union’s Seventh Framework Program (FP7/2007-2013) including ERC grant agreements 240672, 291329, and 306478. We acknowledge support from the Brazilian Instituto Nacional de Ciência e Tecnologia (INCT) do e-Universo (CNPq grant 465376/2014-2).

Published
2021

27. OzDES multi-object fibre spectroscopy for the Dark Energy Survey: Results and second data release

Author

Enrique Gaztanaga, C. Lidman, J. Carretero, Tim Eifler, B. E. Tucker, E. Swann, Tamara M. Davis, Lluís Galbany, Sara Webb, J. Gschwend, S. Allam, Robert A. Gruendl, Samuel Hinton, Eli S. Rykoff, J. K. Hoormann, Krzysztof Bolejko, W. G. Hartley, G. Gutierrez, M. E. C. Swanson, Mark Sullivan, Edward Macaulay, Anais Möller, Paul Martini, Michael Schubnell, A. Carnero Rosell, Douglas L. Tucker, Kyler Kuehn, Ryan J. Foley, R. D. Wilkinson, Peter Doel, I. Sevilla-Noarbe, Daniel Scolnic, Andrew J. King, N. Kuropatkin, N. E. Sommer, Bonnie Zhang, Felipe Menanteau, M. Pursiainen, G. Tarle, Zhefu Yu, A. Kremin, Fang Yuan, V. Scarpine, Anthony Carr, M. Carrasco Kind, Sunayana Bhargava, David Parkinson, T. N. Varga, L. N. da Costa, S. A. Uddin, A. R. Walker, Robert C. Nichol, A. Roodman, M. Childress, Daniela Carollo, M. Costanzi, K. Honscheid, Juan Garcia-Bellido, E. Bertin, D. Lagattuta, Antonella Palmese, Jennifer L. Marshall, J. De Vicente, Joshua A. Frieman, M. A. G. Maia, D. Mudd, W. C. Wester, Fiona H. Panther, U. Malik, M. March, Basilio X. Santiago, Geraint F. Lewis, Peter Melchior, Richard Scalzo, J. Annis, Rob Sharp, M. Sako, D. L. Hollowood, S. Serrano, Richard Kessler, P. Wiseman, S. Everett, David J. Brooks, Marcos Lima, E. Suchyta, A. A. Plazas, F. J. Castander, Jacobo Asorey, T. M. C. Abbott, D. J. Brout, Michel Aguena, Huan Lin, J. Calcino, David J. James, Pablo Fosalba, E. J. Sanchez, Karl Glazebrook, Ramon Miquel, F. Paz-Chinchón, M. Smith, Daniel Gruen, Tenglin Li, Santiago Avila, A. G. Kim, Lidman, C., Tucker, B. E., Davis, T. M., Uddin, S. A., Asorey, J., Bolejko, K., Brout, D., Calcino, J., Carollo, D., Carr, A., Childress, M., Hoormann, J. K., Foley, R. J., Galbany, L., Glazebrook, K., Hinton, S. R., Kessler, R., Kim, A. G., King, A., Kremin, A., Kuehn, K., Lagattuta, D., Lewis, G. F., Macaulay, E., Malik, U., March, M., Martini, P., Moller, A., Mudd, D., Nichol, R. C., Panther, F., Parkinson, D., Pursiainen, M., Sako, M., Swann, E., Scalzo, R., Scolnic, D., Sharp, R., Smith, M., Sommer, N. E., Sullivan, M., Webb, S., Wiseman, P., Yu, Z., Yuan, F., Zhang, B., Abbott, T. M. C., Aguena, M., Allam, S., Annis, J., Avila, S., Bertin, E., Bhargava, S., Brooks, D., Carnero Rosell, A., Carrasco Kind, M., Carretero, J., Castander, F. J., Costanzi, M., Da Costa, L. N., De Vicente, J., Doel, P., Eifler, T. F., Everett, S., Fosalba, P., Frieman, J., Garcia-Bellido, J., Gaztanaga, E., Gruen, D., Gruendl, R. A., Gschwend, J., Gutierrez, G., Hartley, W. G., Hollowood, D. L., Honscheid, K., James, D. J., Kuropatkin, N., T. S., Li, Lima, M., Lin, H., Maia, M. A. G., Marshall, J. L., Melchior, P., Menanteau, F., Miquel, R., Palmese, A., Paz-Chinchon, F., Plazas, A. A., Roodman, A., Rykoff, E. S., Sanchez, E., Santiago, B., Scarpine, V., Schubnell, M., Serrano, S., Sevilla-Noarbe, I., Suchyta, E., Swanson, M. E. C., Tarle, G., Tucker, D. L., Varga, T. N., Walker, A. R., Wester, W., Wilkinson, R. D., Laboratoire de Physique de Clermont (LPC), Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut d'Astrophysique de Paris (IAP), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), DES, Department of Energy (US), National Science Foundation (US), Ministerio de Ciencia, Innovación y Universidades (España), Science and Technology Facilities Council (UK), University of Illinois, Kavli Institute for Theoretical Physics, University of Chicago, The Ohio State University, Texas A&M University, Financiadora de Estudos e Projetos (Brasil), Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro, Conselho Nacional de Desenvolvimento Científico e Tecnológico (Brasil), Ministério da Ciência, Tecnologia e Inovação (Brasil), German Research Foundation, European Commission, Australian Research Council, and Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS)

Subjects
transients: supernovae, Astrophysics, dark energy [cosmology], 01 natural sciences, 7. Clean energy, law.invention, cosmology: dark energy, supermassive black hole [quasars], law, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], 010303 astronomy & astrophysics, catalogues, Physics, quasars: supermassive black holes, Astrophysics::Instrumentation and Methods for Astrophysics, GALÁXIAS, Supernova, spectroscopic [techniques], Astrophysics::Earth and Planetary Astrophysics, surveys, techniques: spectroscopic, catalogue, Astrophysics - Cosmology and Nongalactic Astrophysics, Active galactic nucleus, Cosmology and Nongalactic Astrophysics (astro-ph.CO), FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Telescope, supermassive black holessurveys [Quasars], 0103 physical sciences, survey, Spectrograph, Astrophysics::Galaxy Astrophysics, STFC, 010308 nuclear & particles physics, supermassive black holes [quasars], RCUK, Astronomy and Astrophysics, Astrophysics - Astrophysics of Galaxies, Galaxy, Redshift, Photometry (astronomy), 13. Climate action, Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), Dark energy, Quasars: supermassive black holessurveys, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], supernovae [transients]
Abstract

We present a description of the Australian Dark Energy Survey (OzDES) and summarize the results from its 6 years of operations. Using the 2dF fibre positioner and AAOmega spectrograph on the 3.9-m Anglo-Australian Telescope, OzDES has monitored 771 active galactic nuclei, classified hundreds of supernovae, and obtained redshifts for thousands of galaxies that hosted a transient within the 10 deep fields of the Dark Energy Survey. We also present the second OzDES data release, containing the redshifts of almost 30 000 sources, some as faint as r = 24 mag, and 375 000 individual spectra. These data, in combination with the time-series photometry from the Dark Energy Survey, will be used to measure the expansion history of the Universe out to z ∼1.2 and the masses of hundreds of black holes out to z ∼4. OzDES is a template for future surveys that combine simultaneous monitoring of targets with wide-field imaging cameras and wide-field multi-object spectrographs., Funding for the DES Projects has been provided by the U.S. Department of Energy, the U.S. National Science Foundation, the Ministry of Science and Education of Spain, the Science and Technology Facilities Council of the United Kingdom, the Higher Education Funding Council for England, the National Center for Supercomputing Applications at the University of Illinois at Urbana-Champaign, the Kavli Institute of Cosmological Physics at the University of Chicago, the Center for Cosmology and Astro-Particle Physics at the Ohio State University, the Mitchell Institute for Fundamental Physics and Astronomy at Texas A&M University, Fi-nanciadora de Estudos e Projetos, Fundac¸ão Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro, Conselho Nacional de Desenvolvimento Científico e Tecnológico and the Ministério da Ciência, Tecnologia e Inovação, the Deutsche Forschungsgemein-schaft, and the Collaborating Institutions in the DES. LG was funded by the European Union’s Horizon 2020 research and innovation program under the Marie Skłodowska-Curie grant agreement no. 839090. The DES data management system is supported by the National Science Foundation under Grant Numbers AST-1138766 and AST-1536171. The DES participants from Spanish institutions are partially supported by MINECO under grants AYA2015-71825, ESP2015-66861, FPA2015-68048, SEV-2016-0588, SEV-2016-0597, and MDM-2015-0509, some of which include ERDF funds from the European Union. IFAE is partially funded by the CERCA program of the Generalitat de Catalunya. Research leading to these results has received funding from the European Research Council under the European Union’s Seventh Framework Program (FP7/2007-2013) including ERC grant agreements 240672, 291329, and 306478. We acknowledge support from the Brazilian Instituto Nacional de Ciência e Tecnologia (INCT) e-Universe (CNPq grant 465376/2014-2). Parts of this research were supported by the Australian Research Council under grants DP160100930, FL180100168, and FT140101270.

Published
2020

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