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1. Testing the lognormality of the galaxy and weak lensing convergence distributions from Dark Energy Survey maps

Author

Clerkin, L., Kirk, D., Manera, M., Lahav, O., Abdalla, F., Amara, A., Bacon, D., Chang, C., Gaztañaga, E., Hawken, A., Jain, B., Joachimi, B., Vikram, V., Abbott, T., Allam, S., Armstrong, R., Benoit-Lévy, A, Bernstein, G. M., Bertin, E., Brooks, D., Burk, D. L., Rosell, A. Carnero, Kind, M. Carrasco, Crocce, M., Cunha, C. E., D'Andrea, C. B., da Costa, L. N., Desai, S., Diehl, H. T., Dietrich, J. P., Eifler, T. F., Evrard, A. E., Flaugher, B., Fosalba, P., Frieman, J., Gerdes, D. W., Gruen, D., Gruendl, R. A., Gutierrez, G., Honscheid, K., James, D. J., Kent, S., Kuehn, K., Kuropatkin, N., Lima, M., Melchior, P., Miquel, R., Nord, B., Plazas, A. A., Romer, A. K., Sanchez, E., Schubnell, M., Sevilla-Noarbe, I., Smith, R. C., Santos, M. Soares, Sobreira, F., Suchyta, E., Swanson, M. E. C., Tarle, G., and Walker, A. R.

Subjects
Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

It is well known that the probability distribution function (PDF) of galaxy density contrast is approximately lognormal; whether the PDF of mass fluctuations derived from weak lensing convergence (kappa_WL) is lognormal is less well established. We derive PDFs of the galaxy and projected matter density distributions via the Counts in Cells (CiC) method. We use maps of galaxies and weak lensing convergence produced from the Dark Energy Survey (DES) Science Verification data over 139 deg^2. We test whether the underlying density contrast is well described by a lognormal distribution for the galaxies, the convergence and their joint PDF. We confirm that the galaxy density contrast distribution is well modeled by a lognormal PDF convolved with Poisson noise at angular scales from 10-40 arcmin (corresponding to physical scales of 3-10 Mpc). We note that as kappa_WL is a weighted sum of the mass fluctuations along the line of sight, its PDF is expected to be only approximately lognormal. We find that the kappa_WL distribution is well modeled by a lognormal PDF convolved with Gaussian shape noise at scales between 10 and 20 arcmin, with a best-fit chi^2/DOF of 1.11 compared to 1.84 for a Gaussian model, corresponding to p-values 0.35 and 0.07 respectively, at a scale of 10 arcmin. Above 20 arcmin a simple Gaussian model is sufficient. The joint PDF is also reasonably fitted by a bivariate lognormal. As a consistency check we compare the variances derived from the lognormal modelling with those directly measured via CiC. Our methods are validated against maps from the MICE Grand Challenge N-body simulation., Comment: 17 pages, 14 figures, submitted to MNRAS

Published
2016
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2. The Dark Energy Survey: more than dark energy - an overview

Author

Dark Energy Survey Collaboration, Abbott, T., Abdalla, F. B., Aleksic, J., Allam, S., Amara, A., Bacon, D., Balbinot, E., Banerji, M., Bechtol, K., Benoit-Levy, A., Bernstein, G. M., Bertin, E., Blazek, J., Bonnett, C., Bridle, S., Brooks, D., Brunner, R. J., Buckley-Geer, E., Burke, D. L., Caminha, G. B., Capozzi, D., Carlsen, J., Carnero-Rosell, A., Carollo, M., Carrasco-Kind, M., Carretero, J., Castander, F. J., Clerkin, L., Collett, T., Conselice, C., Crocce, M., Cunha, C. E., D'Andrea, C. B., da Costa, L. N., Davis, T. M., Desai, S., Diehl, H. T., Dietrich, J. P., Dodelson, S., Doel, P., Drlica-Wagner, A., Estrada, J., Etherington, J., Evrard, A. E., Fabbri, J., Finley, D. A., Flaugher, B., Foley, R. J., Rosalba, P., Frieman, J., Garcia-Bellido, J., Gaztanaga, E., Gerdes, D. W., Giannantonio, T., Goldstein, D. A., Gruen, D., Gruendl, R. A., Guarnieri, P., Gutierrez, G., Hartley, W., Honscheid, K., Jain, B., James, D. J., Jeltema, T., Jouvel, S., Kessler, R., King, A., Kirk, D., Kron, R., Kuehn, K., Kuropatkin, N., Lahav, O., Li, T. S., Lima, M., Lin, H., Maia, M. A. G., Makler, M., Manera, M., Maraston, C., Marshall, J. L., Martini, P., McMahon, R. G., Melchior, P., Merson, A., Miller, C. J., Miquel, R., Mohr, J. J., Morice-Atkinson, X., Naidoo, K., Neilsen, E., Nichol, R. C., Nord, B., Ogando, R., Ostrovski, F., Palmese, A., Papadopoulos, A., Peiris, H., Peoples, J., Percival, W. J., Plazas, A. A., Reed, S. L., Refregier, A., Romer, A. K., Roodman, A., Ross, A., Rozo, E., Rykoff, E. S., Sadeh, I., Sako, M., Sanchez, C., Sanchez, E., Santiago, B., Scarpine, V., Schubnell, M., Sevilla-Noarbe, I., Sheldon, E., Smith, M., Smith, R. C., Soares-Santos, M., Sobreira, F., Soumagnac, M., Suchyta, E., Sullivan, M., Swanson, M., Tarle, G., Thaler, J., Thomas, D., Thomas, R. C., Tucker, D., Vieira, J. D., Vikram, V., Walker, A. R., Wechsler, R. H., Weller, J., Wester, W., Whiteway, L., Wilcox, H., Yanny, B., Zhang, Y., and Zuntz, J.

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

This overview article describes the legacy prospect and discovery potential of the Dark Energy Survey (DES) beyond cosmological studies, illustrating it with examples from the DES early data. DES is using a wide-field camera (DECam) on the 4m Blanco Telescope in Chile to image 5000 sq deg of the sky in five filters (grizY). By its completion the survey is expected to have generated a catalogue of 300 million galaxies with photometric redshifts and 100 million stars. In addition, a time-domain survey search over 27 sq deg is expected to yield a sample of thousands of Type Ia supernovae and other transients. The main goals of DES are to characterise dark energy and dark matter, and to test alternative models of gravity; these goals will be pursued by studying large scale structure, cluster counts, weak gravitational lensing and Type Ia supernovae. However, DES also provides a rich data set which allows us to study many other aspects of astrophysics. In this paper we focus on additional science with DES, emphasizing areas where the survey makes a difference with respect to other current surveys. The paper illustrates, using early data (from `Science Verification', and from the first, second and third seasons of observations), what DES can tell us about the solar system, the Milky Way, galaxy evolution, quasars, and other topics. In addition, we show that if the cosmological model is assumed to be Lambda+ Cold Dark Matter (LCDM) then important astrophysics can be deduced from the primary DES probes. Highlights from DES early data include the discovery of 34 Trans Neptunian Objects, 17 dwarf satellites of the Milky Way, one published z > 6 quasar (and more confirmed) and two published superluminous supernovae (and more confirmed)., Comment: 32 pages, 15 figures; a revised Figure 1 and minor changes, to match the published MNRAS version

Published
2016
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3. The Dark Energy Survey: more than dark energy – an overview

Author

Collaboration:, Dark Energy Survey, Abbott, T, Abdalla, FB, Aleksić, J, Allam, S, Amara, A, Bacon, D, Balbinot, E, Banerji, M, Bechtol, K, Benoit-Lévy, A, Bernstein, GM, Bertin, E, Blazek, J, Bonnett, C, Bridle, S, Brooks, D, Brunner, RJ, Buckley-Geer, E, Burke, DL, Caminha, GB, Capozzi, D, Carlsen, J, Carnero-Rosell, A, Carollo, M, Carrasco-Kind, M, Carretero, J, Castander, FJ, Clerkin, L, Collett, T, Conselice, C, Crocce, M, Cunha, CE, D'Andrea, CB, da Costa, LN, Davis, TM, Desai, S, Diehl, HT, Dietrich, JP, Dodelson, S, Doel, P, Drlica-Wagner, A, Estrada, J, Etherington, J, Evrard, AE, Fabbri, J, Finley, DA, Flaugher, B, Foley, RJ, Fosalba, P, Frieman, J, García-Bellido, J, Gaztanaga, E, Gerdes, DW, Giannantonio, T, Goldstein, DA, Gruen, D, Gruendl, RA, Guarnieri, P, Gutierrez, G, Hartley, W, Honscheid, K, Jain, B, James, DJ, Jeltema, T, Jouvel, S, Kessler, R, King, A, Kirk, D, Kron, R, Kuehn, K, Kuropatkin, N, Lahav, O, Li, TS, Lima, M, Lin, H, Maia, MAG, Makler, M, Manera, M, Maraston, C, Marshall, JL, Martini, P, McMahon, RG, Melchior, P, Merson, A, Miller, CJ, Miquel, R, Mohr, JJ, Morice-Atkinson, X, Naidoo, K, Neilsen, E, Nichol, RC, Nord, B, Ogando, R, Ostrovski, F, Palmese, A, Papadopoulos, A, Peiris, HV, Peoples, J, and Percival, WJ

Subjects
Astronomical Sciences, Physical Sciences, Affordable and Clean Energy, surveys, minor planets, asteroids: general, supernovae: general, Galaxy: general, galaxies: general, quasars: general, astro-ph.CO, astro-ph.GA, Astronomical and Space Sciences, Astronomy & Astrophysics, Astronomical sciences, Particle and high energy physics, Space sciences
Abstract

This overview paper describes the legacy prospect and discovery potential of the Dark Energy Survey (DES) beyond cosmological studies, illustrating it with examples from the DES early data. DES is using a wide-field camera (DECam) on the 4 m Blanco Telescope in Chile to image 5000 sq deg of the sky in five filters (grizY). By its completion, the survey is expected to have generated a catalogue of 300 million galaxies with photometric redshifts and 100 million stars. In addition, a time-domain survey search over 27 sq deg is expected to yield a sample of thousands of Type Ia supernovae and other transients. The main goals of DES are to characterize dark energy and dark matter, and to test alternative models of gravity; these goals will be pursued by studying large-scale structure, cluster counts, weak gravitational lensing and Type Ia supernovae. However, DES also provides a rich data set which allows us to study many other aspects of astrophysics. In this paper, we focus on additional science with DES, emphasizing areas where the survey makes a difference with respect to other current surveys. The paper illustrates, using early data (from 'Science Verification', and from the first, second and third seasons of observations), what DES can tell us about the Solar system, the Milky Way, galaxy evolution, quasars and other topics. In addition, we show that if the cosmological model is assumed to be Λ+cold dark matter, then important astrophysics can be deduced from the primary DES probes. Highlights from DES early data include the discovery of 34 trans-Neptunian objects, 17 dwarf satellites of the Milky Way, one published z > 6 quasar (and more confirmed) and two published superluminous supernovae (and more confirmed).

Published
2016

4. The Dark Energy Survey: More than dark energy - an overview

Author

Abbott, T, Abdalla, FB, Aleksić, J, Allam, S, Amara, A, Bacon, D, Balbinot, E, Banerji, M, Bechtol, K, Benoit-Lévy, A, Bernstein, GM, Bertin, E, Blazek, J, Bonnett, C, Bridle, S, Brooks, D, Brunner, RJ, Buckley-Geer, E, Burke, DL, Caminha, GB, Capozzi, D, Carlsen, J, Carnero-Rosell, A, Carollo, M, Carrasco-Kind, M, Carretero, J, Castander, FJ, Clerkin, L, Collett, T, Conselice, C, Crocce, M, Cunha, CE, D'Andrea, CB, da Costa, LN, Davis, TM, Desai, S, Diehl, HT, Dietrich, JP, Dodelson, S, Doel, P, Drlica-Wagner, A, Estrada, J, Etherington, J, Evrard, AE, Fabbri, J, Finley, DA, Flaugher, B, Foley, RJ, Fosalba, P, Frieman, J, García-Bellido, J, Gaztanaga, E, Gerdes, DW, Giannantonio, T, Goldstein, DA, Gruen, D, Gruendl, RA, Guarnieri, P, Gutierrez, G, Hartley, W, Honscheid, K, Jain, B, James, DJ, Jeltema, T, Jouvel, S, Kessler, R, King, A, Kirk, D, Kron, R, Kuehn, K, Kuropatkin, N, Lahav, O, Li, TS, Lima, M, Lin, H, Maia, MAG, Makler, M, Manera, M, Maraston, C, Marshall, JL, Martini, P, McMahon, RG, Melchior, P, Merson, A, Miller, CJ, Miquel, R, Mohr, JJ, Morice-Atkinson, X, Naidoo, K, Neilsen, E, Nichol, RC, Nord, B, Ogando, R, Ostrovski, F, Palmese, A, Papadopoulos, A, Peiris, HV, Peoples, J, Percival, WJ, and Plazas, AA

Subjects
surveys, minor planets, asteroids: general, supernovae: general, Galaxy: general, galaxies: general, quasars: general, astro-ph.CO, astro-ph.GA, minor planets, asteroids: general, Astronomy & Astrophysics, Astronomical and Space Sciences
Abstract

This overview paper describes the legacy prospect and discovery potential of the Dark Energy Survey (DES) beyond cosmological studies, illustrating it with examples from the DES early data. DES is using a wide-field camera (DECam) on the 4 m Blanco Telescope in Chile to image 5000 sq deg of the sky in five filters (grizY). By its completion, the survey is expected to have generated a catalogue of 300 million galaxies with photometric redshifts and 100 million stars. In addition, a time-domain survey search over 27 sq deg is expected to yield a sample of thousands of Type Ia supernovae and other transients. The main goals of DES are to characterize dark energy and dark matter, and to test alternative models of gravity; these goals will be pursued by studying large-scale structure, cluster counts, weak gravitational lensing and Type Ia supernovae. However, DES also provides a rich data set which allows us to study many other aspects of astrophysics. In this paper, we focus on additional science with DES, emphasizing areas where the survey makes a difference with respect to other current surveys. The paper illustrates, using early data (from 'Science Verification', and from the first, second and third seasons of observations), what DES can tell us about the Solar system, the Milky Way, galaxy evolution, quasars and other topics. In addition, we show that if the cosmological model is assumed to be Λ+cold dark matter, then important astrophysics can be deduced from the primary DES probes. Highlights from DES early data include the discovery of 34 trans-Neptunian objects, 17 dwarf satellites of the Milky Way, one published z > 6 quasar (and more confirmed) and two published superluminous supernovae (and more confirmed).

Published
2016

5. A Prescription for Galaxy Biasing Evolution as a Nuisance Parameter

Author

Clerkin, L., Kirk, D., Lahav, O., Abdalla, F. B., and Gaztanaga, E.

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

There is currently no consistent approach to modelling galaxy bias evolution in cosmological inference. This lack of a common standard makes the rigorous comparison or combination of probes difficult. We show that the choice of biasing model has a significant impact on cosmological parameter constraints for a survey such as the Dark Energy Survey (DES), considering the 2-point correlations of galaxies in five tomographic redshift bins. We find that modelling galaxy bias with a free biasing parameter per redshift bin gives a Figure of Merit (FoM) for Dark Energy equation of state parameters w_0, w_a smaller by a factor of 10 than if a constant bias is assumed. An incorrect bias model will also cause a shift in measured values of cosmological parameters. Motivated by these points and focusing on the redshift evolution of linear bias, we propose the use of a generalised galaxy bias which encompasses a range of bias models from theory, observations and simulations, b(z) = c + (b_0 - c)/D(z)^alpha, where parameters c, b_0 and alpha depend on galaxy properties such as halo mass. For a DES-like galaxy survey we find that this model gives an unbiased estimate of w_0, w_a with the same number or fewer nuisance parameters and a higher FoM than a simple b(z) model allowed to vary in z-bins. We show how the parameters of this model are correlated with cosmological parameters. We fit a range of bias models to two recent datasets, and conclude that this generalised parameterisation is a sensible benchmark expression of galaxy bias on large scales., Comment: 13 pages, 8 figures. Published in MNRAS, ref MN-14-1357-MJ.R1

Published
2014
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6. FUNDOSCOPY A FORGOTTEN ART

Author

ROBERTS, E., MORGAN, R., KING, D., and CLERKIN, L.

Subjects
Geriatrics -- Research, Eye -- Testing, Health, Psychology and mental health, Seniors, Social sciences, British Geriatrics Society -- Conferences, meetings and seminars
Published
1999

7. Testing the lognormality of the galaxy and weak lensing convergence distributions from Dark Energy Survey maps

Author

Clerkin, L., primary, Kirk, D., additional, Manera, M., additional, Lahav, O., additional, Abdalla, F., additional, Amara, A., additional, Bacon, D., additional, Chang, C., additional, Gaztañaga, E., additional, Hawken, A., additional, Jain, B., additional, Joachimi, B., additional, Vikram, V., additional, Abbott, T., additional, Allam, S., additional, Armstrong, R., additional, Benoit-Lévy, A., additional, Bernstein, G. M., additional, Bernstein, R. A., additional, Bertin, E., additional, Brooks, D., additional, Burke, D. L., additional, Rosell, A. Carnero, additional, Carrasco Kind, M., additional, Crocce, M., additional, Cunha, C. E., additional, D'Andrea, C. B., additional, da Costa, L. N., additional, Desai, S., additional, Diehl, H. T., additional, Dietrich, J. P., additional, Eifler, T. F., additional, Evrard, A. E., additional, Flaugher, B., additional, Fosalba, P., additional, Frieman, J., additional, Gerdes, D. W., additional, Gruen, D., additional, Gruendl, R. A., additional, Gutierrez, G., additional, Honscheid, K., additional, James, D. J., additional, Kent, S., additional, Kuehn, K., additional, Kuropatkin, N., additional, Lima, M., additional, Melchior, P., additional, Miquel, R., additional, Nord, B., additional, Plazas, A. A., additional, Romer, A. K., additional, Roodman, A., additional, Sanchez, E., additional, Schubnell, M., additional, Sevilla-Noarbe, I., additional, Smith, R. C., additional, Soares-Santos, M., additional, Sobreira, F., additional, Suchyta, E., additional, Swanson, M. E. C., additional, Tarle, G., additional, and Walker, A. R., additional

Published
2016
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8. The dark energy survey and operations: years 1 to 3

Author

Diehl, H. T., additional, Neilsen, E., additional, Gruendl, R., additional, Yanny, B., additional, Abbott, T. M. C., additional, Aleksić, J., additional, Allam, S., additional, Annis, J., additional, Balbinot, E., additional, Baumer, M., additional, Beaufore, L., additional, Bechtol, K., additional, Bernstein, G., additional, Birrer, S., additional, Bonnett, C., additional, Brout, D., additional, Bruderer, C., additional, Buckley-Geer, E. J., additional, Capozzi, D., additional, Carnero Rosell, A., additional, Castander, F. J., additional, Cawthon, R., additional, Chang, C., additional, Clerkin, L., additional, Covarrubias, R., additional, Cuhna, C., additional, D'Andrea, C., additional, da Costa, L., additional, Das, R., additional, Davis, C., additional, Dietrich, J., additional, Drlica-Wagner, A., additional, Elliott, A., additional, Eifler, T. F., additional, Etherington, J., additional, Flaugher, B. L., additional, Frieman, J., additional, Fausti Neto, A., additional, Fernández, M. G., additional, Furlanetto, C., additional, Gangkofner, D., additional, Gerdes, D. W., additional, Goldstein, D. A., additional, Grabowski, K., additional, Gupta, R. R., additional, Hamilton, S., additional, Head, H., additional, Helsby, J., additional, Hollowood, D., additional, Honscheid, K., additional, James, D., additional, Johnson, M., additional, Johnson, M. W. G., additional, Jouvel, S., additional, Kacprzac, T., additional, Kent, S., additional, Kessler, R., additional, Kim, A., additional, Krause, E., additional, Krawiec, C. I., additional, Kremin, A., additional, Kron, R., additional, Kuhlmann, S., additional, Kuropatkin, N., additional, Lahav, O., additional, Lasker, J., additional, Li, T. S., additional, Luque, E., additional, Maccrann, N., additional, March, M., additional, Marshall, J., additional, Mondrik, N. P., additional, Morganson, E. P., additional, Mudd, D., additional, Nadolski, A., additional, Nugent, P., additional, Melchior, P., additional, Menanteau, F., additional, Nagasawa, D. Q., additional, Nord, B., additional, Ogando, R., additional, Old, L., additional, Palmese, A., additional, Petravick, D., additional, Plazas, A. A., additional, Pujol, A., additional, Queiroz, A. B. A., additional, Reil, K., additional, Romer, A. K., additional, Rosenfeld, R., additional, Roodman, A., additional, Rooney, P., additional, Sako, M., additional, Salvador, A. I., additional, Sánchez, C., additional, Sánchez Álvaro, E., additional, Santiago, B. X., additional, Schooneveld, A., additional, Schubnell, M., additional, Sheldon, E., additional, Smith, A., additional, Smith, R. C., additional, Soares-Santos, M., additional, Sobreira, F., additional, Soumagnac, M., additional, Spinka, H., additional, Tie, S. S., additional, Tucker, D., additional, Vikram, V., additional, Vivas, K., additional, Walker, A. R., additional, Wester, W., additional, Wiesner, M., additional, Wilcox, H., additional, Williams, P., additional, Zenteno, A., additional, Zhang, Y., additional, and Zhang, Z., additional

Published
2016
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10. The Dark Energy Survey and operations: Year 1

Author

Diehl, H. T., additional, Abbott, T. M. C., additional, Annis, J., additional, Armstrong, R., additional, Baruah, L., additional, Bermeo, A., additional, Bernstein, G., additional, Beynon, E., additional, Bruderer, C., additional, Buckley-Geer, E. J., additional, Campbell, H., additional, Capozzi, D., additional, Carter, M., additional, Casas, R., additional, Clerkin, L., additional, Covarrubias, R., additional, Cuhna, C., additional, D'Andrea, C., additional, da Costa, L., additional, Das, R., additional, DePoy, D. L., additional, Dietrich, J., additional, Drlica-Wagner, A., additional, Elliott, A., additional, Eifler, T., additional, Estrada, J., additional, Etherington, J., additional, Flaugher, B. L., additional, Frieman, J., additional, Fausti Neto, A., additional, Gelman, M., additional, Gerdes, D., additional, Gruen, D., additional, Gruendl, R., additional, Hao, J., additional, Head, H., additional, Helsby, J., additional, Hoffman, K., additional, Honscheid, K., additional, James, D., additional, Johnson, M., additional, Kacprzac, T., additional, Katsaros, J., additional, Kennedy, J., additional, Kent, S., additional, Kessler, R., additional, Kim, A., additional, Krause, E., additional, Kron, R., additional, Kuhlmann, S., additional, Kunder, A., additional, Li, T., additional, Lin, H., additional, MacCrann, N., additional, March, M., additional, Marshall, J., additional, Neilsen, E., additional, Nugent, P., additional, Martini, P., additional, Melchior, P., additional, Menanteau, F., additional, Nichol, R. C., additional, Nord, B., additional, Ogando, R., additional, Old, L., additional, Papadopoulos, A., additional, Patton, K., additional, Petravick, D., additional, Plazas, A. A., additional, Poulton, R., additional, Pujol, A., additional, Reil, K., additional, Rigby, T., additional, Romer, A., additional, Roodman, A., additional, Rooney, P., additional, Sanchez Alvaro, E., additional, Serrano, S., additional, Sheldon, E., additional, Smith, A., additional, Smith, R. C., additional, Soares-Santos, M., additional, Soumagnac, M., additional, Spinka, H., additional, Suchyta, E., additional, Tucker, D., additional, Walker, A. R., additional, Wester, W., additional, Wiesner, M., additional, Wilcox, H., additional, Williams, R., additional, Yanny, B., additional, and Zhang, Y. -., additional

Published
2014
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11. The dark energy survey and operations: years 1 to 3

Author

Peck, Alison B., Seaman, Robert L., Benn, Chris R., Diehl, H. T., Neilsen, E., Gruendl, R., Yanny, B., Abbott, T. M. C., Aleksić, J., Allam, S., Annis, J., Balbinot, E., Baumer, M., Beaufore, L., Bechtol, K., Bernstein, G., Birrer, S., Bonnett, C., Brout, D., Bruderer, C., Buckley-Geer, E. J., Capozzi, D., Carnero Rosell, A., Castander, F. J., Cawthon, R., Chang, C., Clerkin, L., Covarrubias, R., Cuhna, C., D'Andrea, C., da Costa, L., Das, R., Davis, C., Dietrich, J., Drlica-Wagner, A., Elliott, A., Eifler, T. F., Etherington, J., Flaugher, B. L., Frieman, J., Fausti Neto, A., Fernández, M. G., Furlanetto, C., Gangkofner, D., Gerdes, D. W., Goldstein, D. A., Grabowski, K., Gupta, R. R., Hamilton, S., Head, H., Helsby, J., Hollowood, D., Honscheid, K., James, D., Johnson, M., Johnson, M. W. G., Jouvel, S., Kacprzac, T., Kent, S., Kessler, R., Kim, A., Krause, E., Krawiec, C. I., Kremin, A., Kron, R., Kuhlmann, S., Kuropatkin, N., Lahav, O., Lasker, J., Li, T. S., Luque, E., Maccrann, N., March, M., Marshall, J., Mondrik, N. P., Morganson, E. P., Mudd, D., Nadolski, A., Nugent, P., Melchior, P., Menanteau, F., Nagasawa, D. Q., Nord, B., Ogando, R., Old, L., Palmese, A., Petravick, D., Plazas, A. A., Pujol, A., Queiroz, A. B. A., Reil, K., Romer, A. K., Rosenfeld, R., Roodman, A., Rooney, P., Sako, M., Salvador, A. I., Sánchez, C., Sánchez Álvaro, E., Santiago, B. X., Schooneveld, A., Schubnell, M., Sheldon, E., Smith, A., Smith, R. C., Soares-Santos, M., Sobreira, F., Soumagnac, M., Spinka, H., Tie, S. S., Tucker, D., Vikram, V., Vivas, K., Walker, A. R., Wester, W., Wiesner, M., Wilcox, H., Williams, P., Zenteno, A., Zhang, Y., and Zhang, Z.

Published
2016
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12. The Dark Energy Survey and operations: Year 1

Author

Peck, Alison B., Benn, Chris R., Seaman, Robert L., Diehl, H. T., Abbott, T. M. C., Annis, J., Armstrong, R., Baruah, L., Bermeo, A., Bernstein, G., Beynon, E., Bruderer, C., Buckley-Geer, E. J., Campbell, H., Capozzi, D., Carter, M., Casas, R., Clerkin, L., Covarrubias, R., Cuhna, C., D'Andrea, C., da Costa, L., Das, R., DePoy, D. L., Dietrich, J., Drlica-Wagner, A., Elliott, A., Eifler, T., Estrada, J., Etherington, J., Flaugher, B. L., Frieman, J., Fausti Neto, A., Gelman, M., Gerdes, D., Gruen, D., Gruendl, R., Hao, J., Head, H., Helsby, J., Hoffman, K., Honscheid, K., James, D., Johnson, M., Kacprzac, T., Katsaros, J., Kennedy, R., Kent, S., Kessler, R., Kim, A., Krause, E., Kron, R., Kuhlmann, S., Kunder, A., Li, T., Lin, H., Maccrann, N., March, M., Marshall, J., Neilsen, E., Nugent, P., Martini, P., Melchior, P., Menanteau, F., Nichol, R. C., Nord, B., Ogando, R., Old, L., Papadopoulos, A., Patton, K., Petravick, D., Plazas, A. A., Poulton, R., Pujol, A., Reil, K., Rigby, T., Romer, A., Roodman, A., Rooney, P., Sanchez Alvaro, E., Serrano, S., Sheldon, E., Smith, A., Smith, R. C., Soares-Santos, M., Soumagnac, M., Spinka, H., Suchyta, E., Tucker, D., Walker, A. R., Wester, W., Wiesner, M., Wilcox, H., Williams, R., Yanny, B., and Zhang, Y. -.

Published
2014
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13. First SN Discoveries from the Dark Energy Survey

Author

Abbott, T., Abdalla, F., Achitouv, I., Ahn, E., Aldering, G., Allam, S., Alonso, D., Amara, A., Annis, J., Antonik, M., Aragon-Salamanca, A., Armstrong, R., Ashall, C., Asorey, J., Bacon, D., Balbinot, E., Banerji, M., Barbary, K., Barkhouse, W., Baruah, L., Bauer, A., Bechtol, K., Becker, M., Bender, R., Benoist, C., Benoit-Levy, A., Bernardi, M., Bernstein, G., Bernstein, J. P., Bernstein, R., Bertin, E., Beynon, E., Bhattacharya, S., Biesiadzinski, T., Biswas, R., Blake, C., Bloom, J. S., Bocquet, S., Brandt, C., Bridle, S., Brooks, D., Brown, P. J., Brunner, R., Buckley-Geer, E., Burke, D., Burkert, A., Busha, M., Campa, J., Campbell, H., Cane, R., Capozzi, D., Carlstrom, J., Rosell, A. Carnero, Carollo, M., Carrasco-Kind, M., Carretero, J., Carter, M., Casas, R., Castander, F. J., Chen, Y., Chiu, I., Chue, C., Clampitt, J., Clerkin, L., Cohn, J., Colless, M., Copeland, E., Covarrubias, R. A., Crittenden, R., Crocce, M., Cunha, C., Costa, L. Da, D, C., Andrea, Das, S., Das, R., Davis, T. M., Deb, S., Depoy, D., Derylo, G., Desai, S., Simoni, F., Devlin, M., Diehl, H. T., Dietrich, J., Dodelson, S., Doel, P., Dolag, K., Efstathiou, G., Eifler, T., Erickson, B., Eriksen, M., Estrada, J., Etherington, J., August Evrard, Farrens, S., Neto, A. Fausti, Fernandez, E., Ferreira, P. C., Finley, D., Fischer, J. A., Flaugher, B., Fosalba, P., Frieman, J., Furlanetto, C., Garcia-Bellido, J., Gaztanaga, E., Gelman, M., Gerdes, D., Giannantonio, T., Gilhool, S., Gill, M., Gladders, M., Gladney, L., Glazebrook, K., Gray, M., Gruen, D., Gruendl, R., Gupta, R., Gutierrez, G., Habib, S., Hall, E., Hansen, S., Hao, J., Heitmann, K., Helsby, J., Henderson, R., Hennig, C., High, W., Hirsch, M., Hoffmann, K., Holhjem, K., Honscheid, K., Host, O., Hoyle, B., Hu, W., Huff, E., Huterer, D., Jain, B., James, D., Jarvis, M., Jarvis, M. J., Jeltema, T., Johnson, M., Jouvel, S., Kacprzak, T., Karliner, I., Katsaros, J., Kent, S., Kessler, R., Kim, A., Kim-Vy, T., King, L., Kirk, D., Kochanek, C., Kopp, M., Koppenhoefer, J., Kovacs, E., Krause, E., Kravtsov, A., Kron, R., Kuehn, K., Kuemmel, M., Kuhlmann, S., Kunder, A., Kuropatkin, N., Kwan, J., Lahav, O., Leistedt, B., Levi, M., Lewis, P., Liddle, A., Lidman, C., Lilly, S., Lin, H., Liu, J., Lopez-Arenillas, C., Lorenzon, W., Loverde, M., Ma, Z., Maartens, R., Maccrann, N., Macri, L., Maia, M., Makler, M., Manera, M., Maraston, C., March, M., Markovic, K., Marriner, J., Marshall, J., Marshall, S., Martini, P., Sanahuja, P. Marti, Mayers, J., Mckay, T., Mcmahon, R., Melchior, P., Merritt, K. W., Merson, A., Miller, C., Miquel, R., Mohr, J., Moore, T., Mortonson, M., Mosher, J., Mould, J., Mukherjee, P., Neilsen, E., Ngeow, C., Nichol, R., Nidever, D., Nord, B., Nugent, P., Ogando, R., Old, L., Olsen, J., Ostrovski, F., Paech, K., Papadopoulos, A., Papovich, C., Patton, K., Peacock, J., Pellegrini, P. S. S., Peoples, J., Percival, W., Perlmutter, S., Petravick, D., Plazas, A., Ponce, R., Poole, G., Pope, A., Refregier, A., Reyes, R., Ricker, P., Roe, N., Romer, K., Roodman, A., Rooney, P., Ross, A., Rowe, B., Rozo, E., Rykoff, E., Sabiu, C., Saglia, R., Sako, M., Sanchez, A., Sanchez, C., Sanchez, E., Sanchez, J., Santiago, B., Saro, A., Scarpine, V., Schindler, R., Schmidt, B. P., Schmitt, R. L., Schubnell, M., Seitz, S., Senger, R., Sevilla, I., Sharp, R., Sheldon, E., Sheth, R., Smith, R. C., Smith, M., Snigula, J., Soares-Santos, M., Sobreira, F., Song, J., Soumagnac, M., Spinka, H., Stebbins, A., Stoughton, C., Suchyta, E., Suhada, R., Sullivan, M., Sun, F., Suntzeff, N., Sutherland, W., Swanson, M. E. C., Sypniewski, A. J., Szepietowski, R., Talaga, R., Tarle, G., Tarrant, E., Balan, S. Thaithara, Thaler, J., Thomas, D., Thomas, R. C., Tucker, D., Uddin, S. A., Ural, S., Vikram, V., Voigt, L., Walker, A. R., Walker, T., Wechsler, R., Weinberg, D., Weller, J., Wester, W., Wetzstein, M., White, M., Wilcox, H., Wilman, D., Yanny, B., Young, J., Zablocki, A., Zenteno, A., Zhang, Y., and Zuntz, J.

14. Micromolar brain levels of kynurenic acid are associated with a disruption of auditory sensory gating in the rat.

Author

Shepard PD, Joy B, Clerkin L, and Schwarcz R

Subjects
Animals, Male, Rats, Rats, Sprague-Dawley, Receptors, Glycine antagonists & inhibitors, Receptors, Glycine physiology, Acoustic Stimulation methods, Brain metabolism, Evoked Potentials, Auditory physiology, Kynurenic Acid metabolism
Abstract

Brain levels of kynurenic acid (KYNA), an endogenous antagonist of glycine(B)/NMDA and alpha-7 nicotinic acetylcholine receptors, are elevated in individuals with schizophrenia. Both receptors are broadly implicated in the pathophysiology of this disease, particularly in the deficits many patients show in filtering the sensorium. In the present study, we sought to determine whether elevated brain levels of KYNA disrupt auditory gating in anesthetized rats. A mid-latency evoked potential was recorded from the hippocampus in response to a pair of auditory tones. Gating was assessed by determining the ratio of the amplitude of test and conditioning responses (T/C ratio) in rats that had received KYNA's precursor L-kynurenine (KYN; 150 mg/kg, i.p.) together with probenecid (PBCD; 200 mg/kg, i.p.) 2 h prior to the start of the recording session. KYNA levels in the hippocampus of KYN+PBCD-treated rats were increased 500-fold, and accompanied by a significant increase in T/C ratio consistent with a disruption in sensory gating. PBCD alone increased hippocampal KYNA 12-fold, but did not significantly elevate T/C ratio. L-701,324 (3-30 mg/kg, i.v.), a centrally acting glycine(B) site antagonist, also failed to disrupt gating; however, large quantities of the competitive NMDA receptor antagonist DL-2-amino-5-phosphopentanoate (200 nmol, i.c.v.) markedly increased T/C ratio. Thus, while total blockade of NMDA receptors disrupts auditory gating, partial blockade achieved by antagonism of its glycine coagonist binding site does not. These observations indicate that the disruption in auditory processing in rats with greatly elevated KYNA levels is not attributable to the compound's antagonist actions at the glycine(B) receptor.

Published
2003
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15. Funduscopy: a forgotten art?

Author

Roberts E, Morgan R, King D, and Clerkin L

Subjects
Diabetic Retinopathy diagnosis, Fundus Oculi, Humans, Medical Audit, Medical Staff, Hospital, Ophthalmoscopes, Ophthalmoscopy methods, Retinal Diseases diagnosis
Abstract

Funduscopy is an integral part of the physical examination, especially in older patients in whom visual problems and systemic diseases affecting the fundi (e.g., diabetes mellitus) are more common. We have assessed the views of hospital doctors to funduscopy via a questionnaire survey, reviewed the case notes to see whether or not funduscopy is carried out on older patients, and assessed the views of older patients on vision via a questionnaire survey. Review of the case notes showed only three of 100 patients had had funduscopy. Most patients reported a visual problem on specific enquiry. Whilst most hospital doctors believed funduscopy was important, many felt they had insufficient training in this procedure and felt their skills could be improved. We conclude that older patients are missing out on routine funduscopy. Hospital doctors should be aware that not all patients complain of visual problems and specific enquiry should be made. The issue of training and encouragement to perform funduscopy needs to be addressed before funduscopy becomes a forgotten art.

Published
1999
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