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1. DeepZipper II: Searching for Lensed Supernovae in Dark Energy Survey Data with Deep Learning

Author

R. Morgan, B. Nord, K. Bechtol, A. Möller, W. G. Hartley, S. Birrer, S. J. González, M. Martinez, R. A. Gruendl, E. J. Buckley-Geer, A. J. Shajib, A. Carnero Rosell, C. Lidman, T. Collett, T. M. C. Abbott, M. Aguena, F. Andrade-Oliveira, J. Annis, D. Bacon, S. Bocquet, D. Brooks, D. L. Burke, M. Carrasco Kind, J. Carretero, F. J. Castander, C. Conselice, L. N. da Costa, M. Costanzi, J. De Vicente, S. Desai, P. Doel, S. Everett, I. Ferrero, B. Flaugher, D. Friedel, J. Frieman, J. García-Bellido, E. Gaztanaga, D. Gruen, G. Gutierrez, S. R. Hinton, D. L. Hollowood, K. Honscheid, K. Kuehn, N. Kuropatkin, O. Lahav, M. Lima, F. Menanteau, R. Miquel, A. Palmese, F. Paz-Chinchón, M. E. S. Pereira, A. Pieres, A. A. Plazas Malagón, J. Prat, M. Rodriguez-Monroy, A. K. Romer, A. Roodman, E. Sanchez, V. Scarpine, I. Sevilla-Noarbe, M. Smith, E. Suchyta, M. E. C. Swanson, G. Tarle, D. Thomas, T. N. Varga, Morgan, R [0000-0002-7016-5471], Nord, B [0000-0001-6706-8972], Bechtol, K [0000-0001-8156-0429], Möller, A [0000-0001-8211-8608], Birrer, S [0000-0003-3195-5507], González, SJ [0000-0001-7282-3864], Martinez, M [0000-0002-8397-8412], Gruendl, RA [0000-0002-4588-6517], Buckley-Geer, EJ [0000-0002-3304-0733], Shajib, AJ [0000-0002-5558-888X], Rosell, A Carnero [0000-0003-3044-5150], Lidman, C [0000-0003-1731-0497], Collett, T [0000-0001-5564-3140], Aguena, M [0000-0001-5679-6747], Annis, J [0000-0002-0609-3987], Bacon, D [0000-0002-2562-8537], Bocquet, S [0000-0002-4900-805X], Brooks, D [0000-0002-8458-5047], Kind, M Carrasco [0000-0002-4802-3194], Carretero, J [0000-0002-3130-0204], Castander, FJ [0000-0001-7316-4573], Conselice, C [0000-0003-1949-7638], Costanzi, M [0000-0001-8158-1449], De Vicente, J [0000-0001-8318-6813], Desai, S [0000-0002-0466-3288], Flaugher, B [0000-0002-2367-5049], Frieman, J [0000-0003-4079-3263], García-Bellido, J [0000-0002-9370-8360], Gaztanaga, E [0000-0001-9632-0815], Gruen, D [0000-0003-3270-7644], Gutierrez, G [0000-0003-0825-0517], Hinton, SR [0000-0003-2071-9349], Hollowood, DL [0000-0002-9369-4157], Honscheid, K [0000-0002-6550-2023], Kuehn, K [0000-0003-0120-0808], Kuropatkin, N [0000-0003-2511-0946], Lahav, O [0000-0002-1134-9035], Menanteau, F [0000-0002-1372-2534], Miquel, R [0000-0002-6610-4836], Palmese, A [0000-0002-6011-0530], Paz-Chinchón, F [0000-0003-1339-2683], Pieres, A [0000-0001-9186-6042], Malagón, AA Plazas [0000-0002-2598-0514], Romer, AK [0000-0002-9328-879X], Roodman, A [0000-0001-5326-3486], Sanchez, E [0000-0002-9646-8198], Sevilla-Noarbe, I [0000-0002-1831-1953], Smith, M [0000-0002-3321-1432], Suchyta, E [0000-0002-7047-9358], Tarle, G [0000-0003-1704-0781], and Apollo - University of Cambridge Repository

Subjects
Cosmology and Nongalactic Astrophysics (astro-ph.CO), FOS: Physical sciences, Física, Astronomy and Astrophysics, 5109 Space Sciences, Basic Behavioral and Social Science, Supernovae, Space and Planetary Science, 5101 Astronomical Sciences, Strong gravitational lensing, Behavioral and Social Science, 7 Affordable and Clean Energy, 51 Physical Sciences, 5107 Particle and High Energy Physics, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

Artículo escrito por un elevado número de autores, solo se referencian el que aparece en primer lugar, el nombre del grupo de colaboración, si le hubiere, y los autores pertenecientes a la UAM, Gravitationally lensed supernovae (LSNe) are important probes of cosmic expansion, but they remain rare and difficult to find. Current cosmic surveys likely contain 5-10 LSNe in total while next-generation experiments are expected to contain several hundred to a few thousand of these systems. We search for these systems in observed Dark Energy Survey (DES) five year SN fields—10 3 sq. deg. regions of sky imaged in the griz bands approximately every six nights over five years. To perform the search, we utilize the DeepZipper approach: a multi-branch deep learning architecture trained on image-level simulations of LSNe that simultaneously learns spatial and temporal relationships from time series of images. We find that our method obtains an LSN recall of 61.13% and a false-positive rate of 0.02% on the DES SN field data. DeepZipper selected 2245 candidates from a magnitude-limited (m i < 22.5) catalog of 3,459,186 systems. We employ human visual inspection to review systems selected by the network and find three candidate LSNe in the DES SN fields, 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.

Published
2022

2. Overview of the Instrumentation for the Dark Energy Spectroscopic Instrument

Author

Abareshi, B, Aguilar, J, Ahlen, S, Alam, S, Alexander, DM, Alfarsy, R, Allen, L, Prieto, CA, Alves, O, Ameel, J, Armengaud, E, Asorey, J, Aviles, A, Bailey, S, Balaguera-Antolínez, A, Ballester, O, Baltay, C, Bault, A, Beltran, SF, Benavides, B, Benzvi, S, Berti, A, Besuner, R, Beutler, F, Bianchi, D, Blake, C, Blanc, P, Blum, R, Bolton, A, Bose, S, Bramall, D, Brieden, S, Brodzeller, A, Brooks, D, Brownewell, C, Buckley-Geer, E, Cahn, RN, Cai, Z, Canning, R, Capasso, R, Rosell, AC, Carton, P, Casas, R, Castander, FJ, Cervantes-Cota, JL, Chabanier, S, Chaussidon, E, Chuang, C, Circosta, C, Cole, S, Cooper, AP, Costa, LD, Cousinou, MC, Cuceu, A, Davis, TM, Dawson, K, Cruz-Noriega, RDL, Macorra, ADL, Mattia, AD, Costa, JD, Demmer, P, Derwent, M, Dey, A, Dey, B, Dhungana, G, Ding, Z, Dobson, C, Doel, P, Donald-Mccann, J, Donaldson, J, Douglass, K, Duan, Y, Dunlop, P, Edelstein, J, Eftekharzadeh, S, Eisenstein, DJ, Enriquez-Vargas, M, Escoffier, S, Evatt, M, Fagrelius, P, Fan, X, Fanning, K, Fawcett, VA, Ferraro, S, Ereza, J, Flaugher, B, Font-Ribera, A, Forero-Romero, JE, Frenk, CS, Fromenteau, S, Gänsicke, BT, Garcia-Quintero, C, Garrison, L, Gaztañaga, E, Gerardi, F, Gil-Marín, H, A Gontcho, SG, Gonzalez-Morales, AX, Gonzalez-De-Rivera, G, Gonzalez-Perez, V, Aguilar, J [0000-0003-0822-452X], Ahlen, S [0000-0001-6098-7247], Alam, S [0000-0002-3757-6359], Alexander, DM [0000-0002-5896-6313], Allen, L [0000-0002-7789-5119], Prieto, CA [0000-0002-0084-572X], Ameel, J [0000-0003-3638-2584], Asorey, J [0000-0002-6211-499X], Bailey, S [0000-0003-4162-6619], Balaguera-Antolínez, A [0000-0001-5028-3035], Ballester, O [0000-0002-7126-5300], Bault, A [0000-0002-9964-1005], Beltran, SF [0000-0001-6324-4019], Berti, A [0000-0003-3582-6649], Beutler, F [0000-0003-0467-5438], Bose, S [0000-0002-0974-5266], Brieden, S [0000-0003-3896-9215], Brodzeller, A [0000-0002-8934-0954], Brooks, D [0000-0002-8458-5047], Cahn, RN [0000-0003-2748-0641], Cai, Z [0000-0001-8467-6478], Capasso, R [0000-0002-3083-6840], Rosell, AC [0000-0003-3044-5150], Castander, FJ [0000-0001-7316-4573], Cervantes-Cota, JL [0000-0002-3057-6786], Chabanier, S [0000-0002-5692-5243], Chaussidon, E [0000-0001-8996-4874], Chuang, C [0000-0002-3882-078X], Cole, S [0000-0002-5954-7903], Cooper, AP [0000-0001-8274-158X], Cuceu, A [0000-0002-2169-0595], Davis, TM [0000-0002-4213-8783], Dawson, K [0000-0002-0553-3805], Costa, JD [0000-0003-0928-2000], Dey, A [0000-0002-4928-4003], Dey, B [0000-0002-5665-7912], Dhungana, G [0000-0002-5402-1216], Ding, Z [0000-0002-3369-3718], Douglass, K [0000-0002-9540-546X], Duan, Y [0000-0002-2611-0895], Eisenstein, DJ [0000-0002-2929-3121], Escoffier, S [0000-0002-2847-7498], Fan, X [0000-0003-3310-0131], Fawcett, VA [0000-0003-1251-532X], Frenk, CS [0000-0002-2338-716X], Gänsicke, BT [0000-0002-2761-3005], Garrison, L [0000-0002-9853-5673], Gaztañaga, E [0000-0001-9632-0815], Gonzalez-Morales, AX [0000-0003-4089-6924], Gonzalez-De-Rivera, G [0000-0003-4452-743X], Gonzalez-Perez, V [0000-0001-9938-2755], and Apollo - University of Cambridge Repository

Subjects
5101 Astronomical Sciences, astro-ph.CO, Astronomy & Astrophysics, 51 Physical Sciences, Astronomical and Space Sciences, astro-ph.IM, Laboratory Astrophysics, Instrumentation, Software, and Data
Abstract

The Dark Energy Spectroscopic Instrument (DESI) has embarked on an ambitious five-year survey to explore the nature of dark energy with spectroscopy of 40 million galaxies and quasars. DESI will determine precise redshifts and employ the Baryon Acoustic Oscillation method to measure distances from the nearby universe to z > 3.5, as well as measure the growth of structure and probe potential modifications to general relativity. In this paper we describe the significant instrumentation we developed for the DESI survey. The new instrumentation includes a wide-field, 3.2-deg diameter prime-focus corrector that focuses the light onto 5020 robotic fiber positioners on the 0.812 m diameter, aspheric focal surface. The positioners and their fibers are divided among ten wedge-shaped petals. Each petal is connected to one of ten spectrographs via a contiguous, high-efficiency, nearly 50 m fiber cable bundle. The ten spectrographs each use a pair of dichroics to split the light into three channels that together record the light from 360 - 980 nm with a resolution of 2000 to 5000. We describe the science requirements, technical requirements on the instrumentation, and management of the project. DESI was installed at the 4-m Mayall telescope at Kitt Peak, and we also describe the facility upgrades to prepare for DESI and the installation and functional verification process. DESI has achieved all of its performance goals, and the DESI survey began in May 2021. Some performance highlights include RMS positioner accuracy better than 0.1", SNR per \sqrt{\AA} > 0.5 for a z > 2 quasar with flux 0.28e-17 erg/s/cm^2/A at 380 nm in 4000s, and median SNR = 7 of the [OII] doublet at 8e-17 erg/s/cm^2 in a 1000s exposure for emission line galaxies at z = 1.4 - 1.6. We conclude with highlights from the on-sky validation and commissioning of the instrument, key successes, and lessons learned. (abridged)

Published
2022

3. The Observed Evolution of the Stellar Mass-Halo Mass Relation for Brightest Central Galaxies

Author

Golden-Marx, Jesse B., Miller, C. J., Zhang, Y., Ogando, R. L. C., Palmese, A., Abbott, T. M. C., Aguena, M., Allam, S., Andrade-Oliveira, F. [UNESP], Annis, J., Bacon, D., Bertin, E., Brooks, D., Buckley-Geer, E., Rosell, A. Carnero, Kind, M. Carrasco, Castander, F. J., Costanzi, M., Crocce, M., Costa, L. N. da, Pereira, M. E. S., De Vicente, J., Desai, S., Diehl, H. T., Doel, P., Drlica-Wagner, A., Everett, S., Evrard, A. E., Ferrero, I, Flaugher, B., Fosalba, P., Frieman, J., Garcia-Bellido, J., Gaztanaga, E., Gerdes, D. W., Gruen, D., Gruendl, R. A., Gschwend, J., Gutierrez, G., Hartley, W. G., Hinton, S. R., Hollowood, D. L., Honscheid, K., Hoyle, B., James, D. J., Jeltema, T., Kim, A. G., Krause, E., Kuehn, K., Kuropatkin, N., Lahav, O., Lima, M., Maia, M. A. G., Marshall, J. L., Melchior, P., Menanteau, F., Miquel, R., Mohr, J. J., Morgan, R., Paz-Chinchon, F., Petravick, D., Pieres, A., Malagon, A. A. Plazas, Prat, J., Romer, A. K., Sanchez, E., Santiago, B., Scarpine, V, Schubnell, M., Serrano, S., Sevilla-Noarbe, I, Smith, M., Soares-Santos, M., Suchyta, E., Tarle, G., Varga, T. N., DES Collaboration, Golden-Marx, JB [0000-0002-6394-045X], Zhang, Y [0000-0001-5969-4631], Ogando, RLC [0000-0003-2120-1154], Palmese, A [0000-0002-6011-0530], Abbott, TMC [0000-0003-1587-3931], Aguena, M [0000-0001-5679-6747], Annis, J [0000-0002-0609-3987], Bacon, D [0000-0002-2562-8537], Bertin, E [0000-0002-3602-3664], Brooks, D [0000-0002-8458-5047], Carnero Rosell, A [0000-0003-3044-5150], Carrasco Kind, M [0000-0002-4802-3194], Castander, FJ [0000-0001-7316-4573], Costanzi, M [0000-0001-8158-1449], Crocce, M [0000-0002-9745-6228], Da Costa, LN [0000-0002-7731-277X], De Vicente, J [0000-0001-8318-6813], Desai, S [0000-0002-0466-3288], Diehl, HT [0000-0002-8357-7467], Drlica-Wagner, A [0000-0001-8251-933X], Evrard, AE [0000-0002-4876-956X], Ferrero, I [0000-0002-1295-1132], Fosalba, P [0000-0002-1510-5214], García-Bellido, J [0000-0002-9370-8360], Gaztanaga, E [0000-0001-9632-0815], Gerdes, DW [0000-0001-6942-2736], Gruen, D [0000-0003-3270-7644], Gruendl, RA [0000-0002-4588-6517], Gschwend, J [0000-0003-3023-8362], Hinton, SR [0000-0003-2071-9349], Hollowood, DL [0000-0002-9369-4157], Jeltema, T [0000-0001-6089-0365], Kuehn, K [0000-0003-0120-0808], Kuropatkin, N [0000-0003-2511-0946], Marshall, JL [0000-0003-0710-9474], Melchior, P [0000-0002-8873-5065], Menanteau, F [0000-0002-1372-2534], Miquel, R [0000-0002-6610-4836], Morgan, R [0000-0002-7016-5471], Paz-Chinchón, F [0000-0003-1339-2683], Pieres, A [0000-0001-9186-6042], Romer, AK [0000-0002-9328-879X], Sanchez, E [0000-0002-9646-8198], Serrano, S [0000-0002-0211-2861], Sevilla-Noarbe, I [0000-0002-1831-1953], Soares-Santos, M [0000-0001-6082-8529], Tarle, G [0000-0003-1704-0781], Apollo - University of Cambridge Repository, National Science Foundation (US), Ministerio de Ciencia e Innovación (España), European Commission, UAM. Departamento de Física Teórica, A Golden-Marx, Jesse B., Miller, C. J., Zhang, Y., Ogando, R. L. C., Palmese, A., Abbott, T. M. C., Aguena, M., Allam, S., Andrade-Oliveira, F., Annis, J., Bacon, D., Bertin, E., Brooks, D., Buckley-Geer, E., Carnero Rosell, A., Carrasco Kind, M., Castander, F. J., Costanzi, M., Crocce, M., da Costa, L. N., Pereira, M. E. S., De Vicente, J., Desai, S., Diehl, H. T., Doel, P., Drlica-Wagner, A., Everett, S., Evrard, A. E., Ferrero, I., Flaugher, B., Fosalba, P., Frieman, J., García-Bellido, J., Gaztanaga, E., Gerdes, D. W., Gruen, D., Gruendl, R. A., Gschwend, J., Gutierrez, G., Hartley, W. G., Hinton, S. R., Hollowood, D. L., Honscheid, K., Hoyle, B., James, D. J., Jeltema, T., Kim, A. G., Krause, E., Kuehn, K., Kuropatkin, N., Lahav, O., Lima, M., Maia, M. A. G., Marshall, J. L., Melchior, P., Menanteau, F., Miquel, R., Mohr, J. J., Morgan, R., Paz-Chinchón, F., Petravick, D., Pieres, A., Plazas Malagón, A. A., Prat, J., Romer, A. K., Sanchez, E., Santiago, B., Scarpine, V., Schubnell, M., Serrano, S., Sevilla-Noarbe, I., Smith, M., Soares- Santos, M., Suchyta, E., Tarle, G., Varga, T. N., Shanghai Jiao Tong Univ, Univ Michigan, Fermilab Natl Accelerator Lab, Lab Interinst E Astron LIneA, Observ Nacl, Univ Chicago, NSFs Natl Opt Infrared Astron Res Lab, Universidade Estadual Paulista (UNESP), Univ Portsmouth, Inst Astrophys Paris, UPMC Univ Paris 06, UCL, Inst Astrofis Canarias, Univ La Laguna, Natl Ctr Supercomp Applicat, Univ Illinois, Inst Estudis Espacials Catalunya IEEC, CSIC, Univ Trieste, INAF Osservatorio Astron Trieste, Inst Fundamental Phys Universe, Ctr Invest Energet Medioambientales & Tecnol CIEM, IIT Hyderabad, Santa Cruz Inst Particle Phys, Univ Oslo, Univ Autonoma Madrid, Stanford Univ, SLAC Natl Accelerator Lab, Univ Geneva, Univ Queensland, Ohio State Univ, Ludwig Maximilians Univ Munchen, Ctr Astrophys Harvard & Smithsonian, Lawrence Berkeley Natl Lab, Univ Arizona, Macquarie Univ, Lowell Observ, Universidade de São Paulo (USP), Texas A&M Univ, Princeton Univ, Inst Catalana Recerca & Estudis Avancats, Barcelona Inst Sci & Technol, Max Planck Inst Extraterr Phys, Univ Wisconsin, Univ Cambridge, Univ Sussex, Univ Fed Rio Grande do Sul, Univ Southampton, and Oak Ridge Natl Lab

Subjects
Galaxy clusters, Galaxy evolution, Brightest cluster galaxies, astro-ph.GA, FOS: Physical sciences, Física, Galaxy cluster, Astronomy and Astrophysics, GALÁXIAS, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics - Astrophysics of Galaxies, Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), Astrophysics::Galaxy Astrophysics
Abstract

Golden-Marx; J. B. et al. (DES Collaboration), We quantify evolution in the cluster-scale stellar mass-halo mass (SMHM) relation's parameters using 2323 clusters and brightest central galaxies (BCGs) over the redshift range 0.03 ≤ z ≤ 0.60. The precision on the inferred SMHM parameters is improved by including the magnitude gap (m gap) between the BCG and fourth-brightest cluster member (M14) as a third parameter in the SMHM relation. At fixed halo mass, accounting for m gap, through a stretch parameter, reduces the SMHM relation's intrinsic scatter. To explore this redshift range, we use clusters, BCGs, and cluster members identified using the Sloan Digital Sky Survey C4 and redMaPPer cluster catalogs and the Dark Energy Survey redMaPPer catalog. Through this joint analysis, we detect no systematic differences in BCG stellar mass, m gap, and cluster mass (inferred from richness) between the data sets. We utilize the Pareto function to quantify each parameter's evolution. We confirm prior findings of negative evolution in the SMHM relation's slope (3.5σ), and detect negative evolution in the stretch parameter (4.0σ) and positive evolution in the offset parameter (5.8σ). This observed evolution, combined with the absence of BCG growth, when stellar mass is measured within 50 kpc, suggests that this evolution results from changes in the cluster's m gap. For this to occur, late-term growth must be in the intracluster light surrounding the BCG. We also compare the observed results to IllustrisTNG 300-1 cosmological hydrodynamic simulations and find modest qualitative agreement. However, the simulations lack the evolutionary features detected in the real data., 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 Ciênciae Tecnologia (INCT) do e-Universo (CNPq grant 465376/2014-2). This manuscript has been authored by Fermi Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the U.S. Department of Energy, Office of Science, Office of High Energy Physics.

Published
2022

4. The DECam Local Volume Exploration Survey Data Release 2

Author

Drlica-Wagner, A, Ferguson, PS, Adamów, M, Aguena, M, Allam, S, Andrade-Oliveira, F, Bacon, D, Bechtol, K, Bell, EF, Bertin, E, Bilaji, P, Bocquet, S, Bom, CR, Brooks, D, Burke, DL, Carballo-Bello, JA, Carlin, JL, Carnero Rosell, A, Carrasco Kind, M, Carretero, J, Castander, FJ, Cerny, W, Chang, C, Choi, Y, Conselice, C, Costanzi, M, Crnojević, D, Da Costa, LN, De Vicente, J, Desai, S, Esteves, J, Everett, S, Ferrero, I, Fitzpatrick, M, Flaugher, B, Friedel, D, Frieman, J, García-Bellido, J, Gatti, M, Gaztanaga, E, Gerdes, DW, Gruen, D, Gruendl, RA, Gschwend, J, Hartley, WG, Hernandez-Lang, D, Hinton, Hollowood, DL, Honscheid, K, Hughes, AK, Jacques, A, James, DJ, Johnson, MD, Kuehn, K, Kuropatkin, N, Lahav, O, Li, TS, Lidman, C, Lin, H, March, M, Marshall, JL, Martínez-Delgado, D, Martínez-Vázquez, CE, Massana, P, Mau, S, McNanna, M, Melchior, P, Menanteau, F, Miller, AE, Miquel, R, Mohr, JJ, Morgan, R, Mutlu-Pakdil, B, Muñoz, RR, Neilsen, EH, Nidever, DL, Nikutta, R, Nilo Castellon, JL, Noël, NED, Ogando, RLC, Olsen, KAG, Pace, AB, Palmese, A, Paz-Chinchón, F, Pereira, MES, Pieres, A, Plazas Malagón, AA, Prat, J, Riley, AH, Rodriguez-Monroy, M, Romer, AK, Roodman, A, Sako, M, Sakowska, JD, Sanchez, E, Sánchez, FJ, Sand, DJ, Santana-Silva, L, Santiago, B, Schubnell, M, Drlica-Wagner, A [0000-0001-8251-933X], Ferguson, PS [0000-0001-6957-1627], Adamów, M [0000-0002-6904-359X], Aguena, M [0000-0001-5679-6747], Bacon, D [0000-0002-2562-8537], Bechtol, K [0000-0001-8156-0429], Bell, EF [0000-0002-5564-9873], Bertin, E [0000-0002-3602-3664], Bocquet, S [0000-0002-4900-805X], Bom, CR [0000-0003-4383-2969], Brooks, D [0000-0002-8458-5047], Carballo-Bello, JA [0000-0002-3690-105X], Carlin, JL [0000-0002-3936-9628], Carnero Rosell, A [0000-0003-3044-5150], Carrasco Kind, M [0000-0002-4802-3194], Carretero, J [0000-0002-3130-0204], Castander, FJ [0000-0001-7316-4573], Cerny, W [0000-0003-1697-7062], Chang, C [0000-0002-7887-0896], Conselice, C [0000-0003-1949-7638], Costanzi, M [0000-0001-8158-1449], Crnojević, D [0000-0002-1763-4128], De Vicente, J [0000-0001-8318-6813], Desai, S [0000-0002-0466-3288], Fitzpatrick, M [0000-0002-9080-0751], Flaugher, B [0000-0002-2367-5049], Frieman, J [0000-0003-4079-3263], García-Bellido, J [0000-0002-9370-8360], Gaztanaga, E [0000-0001-9632-0815], Gerdes, DW [0000-0001-6942-2736], Gruen, D [0000-0003-3270-7644], Gruendl, RA [0000-0002-4588-6517], Gschwend, J [0000-0003-3023-8362], Hinton, SR [0000-0003-2071-9349], Hollowood, DL [0000-0002-9369-4157], Honscheid, K [0000-0002-6550-2023], Hughes, AK [0000-0002-1718-0402], Jacques, A [0000-0001-9631-831X], James, DJ [0000-0001-5160-4486], Kuehn, K [0000-0003-0120-0808], Kuropatkin, N [0000-0003-2511-0946], Lahav, O [0000-0002-1134-9035], Li, TS [0000-0002-9110-6163], Lidman, C [0000-0003-1731-0497], Lin, H [0000-0002-7825-3206], Marshall, JL [0000-0003-0710-9474], Martínez-Delgado, D [0000-0003-3835-2231], Martínez-Vázquez, CE [0000-0002-9144-7726], Massana, P [0000-0002-8093-7471], Mau, S [0000-0003-3519-4004], McNanna, M [0000-0001-5435-7820], Melchior, P [0000-0002-8873-5065], Menanteau, F [0000-0002-1372-2534], Miller, AE [0000-0002-7483-7327], Miquel, R [0000-0002-6610-4836], Mohr, JJ [0000-0002-0810-5558], Morgan, R [0000-0002-7016-5471], Mutlu-Pakdil, B [0000-0001-9649-4815], Neilsen, EH [0000-0002-7357-0317], Nidever, DL [0000-0002-1793-3689], Nikutta, R [0000-0002-7052-6900], Nilo Castellon, JL [0000-0002-8282-469X], Ogando, RLC [0000-0003-2120-1154], Olsen, KAG [0000-0002-7134-8296], Pace, AB [0000-0002-6021-8760], Palmese, A [0000-0002-6011-0530], Paz-Chinchón, F [0000-0003-1339-2683], Pieres, A [0000-0001-9186-6042], Plazas Malagón, AA [0000-0002-2598-0514], Riley, AH [0000-0001-5805-5766], Romer, AK [0000-0002-9328-879X], Roodman, A [0000-0001-5326-3486], Sako, M [0000-0003-2764-7093], Sakowska, JD [0000-0002-1594-1466], Sanchez, E [0000-0002-9646-8198], Sánchez, FJ [0000-0003-3136-9532], Sand, DJ [0000-0003-4102-380X], Santana-Silva, L [0000-0003-3402-6164], Schubnell, M [0000-0001-9504-2059], and Apollo - University of Cambridge Repository

Subjects
astro-ph.GA, astro-ph.CO, astro-ph.IM
Abstract

We present the second public data release (DR2) from the DECam Local Volume Exploration survey (DELVE). DELVE DR2 combines new DECam observations with archival DECam data from the Dark Energy Survey, the DECam Legacy Survey, and other DECam community programs. DELVE DR2 consists of ~160,000 exposures that cover >21,000 deg^2 of the high Galactic latitude (|b| > 10 deg) sky in four broadband optical/near-infrared filters (g, r, i, z). DELVE DR2 provides point-source and automatic aperture photometry for ~2.5 billion astronomical sources with a median 5{\sigma} point-source depth of g=24.3, r=23.9, i=23.5, and z=22.8 mag. A region of ~17,000 deg^2 has been imaged in all four filters, providing four-band photometric measurements for ~618 million astronomical sources. DELVE DR2 covers more than four times the area of the previous DELVE data release and contains roughly five times as many astronomical objects. DELVE DR2 is publicly available via the NOIRLab Astro Data Lab science platform.

Published
2022

5. Dark Energy Survey Year 3 Results: Measuring the Survey Transfer Function with Balrog

Author

S. Everett, B. Yanny, N. Kuropatkin, E. M. Huff, Y. Zhang, J. Myles, A. Masegian, J. Elvin-Poole, S. Allam, G. M. Bernstein, I. Sevilla-Noarbe, M. Splettstoesser, E. Sheldon, M. Jarvis, A. Amon, I. Harrison, A. Choi, W. G. Hartley, A. Alarcon, C. Sánchez, D. Gruen, K. Eckert, J. Prat, M. Tabbutt, V. Busti, M. R. Becker, N. MacCrann, H. T. Diehl, D. L. Tucker, E. Bertin, T. Jeltema, A. Drlica-Wagner, R. A. Gruendl, K. Bechtol, A. Carnero Rosell, T. M. C. Abbott, M. Aguena, J. Annis, D. Bacon, S. Bhargava, D. Brooks, D. L. Burke, M. Carrasco Kind, J. Carretero, F. J. Castander, C. Conselice, M. Costanzi, L. N. da Costa, M. E. S. Pereira, J. De Vicente, J. DeRose, S. Desai, T. F. Eifler, A. E. Evrard, I. Ferrero, P. Fosalba, J. Frieman, J. García-Bellido, E. Gaztanaga, D. W. Gerdes, G. Gutierrez, S. R. Hinton, D. L. Hollowood, K. Honscheid, D. Huterer, D. J. James, S. Kent, E. Krause, K. Kuehn, O. Lahav, M. Lima, H. Lin, M. A. G. Maia, J. L. Marshall, P. Melchior, F. Menanteau, R. Miquel, J. J. Mohr, R. Morgan, J. Muir, R. L. C. Ogando, A. Palmese, F. Paz-Chinchón, A. A. Plazas, M. Rodriguez-Monroy, A. K. Romer, A. Roodman, E. Sanchez, V. Scarpine, S. Serrano, M. Smith, M. Soares-Santos, E. Suchyta, M. E. C. Swanson, G. Tarle, C. To, M. A. Troxel, T. N. Varga, J. Weller, R. D. Wilkinson, 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), Science and Technology Facilities Council (UK), Agencia Estatal de Investigación (España), Ministerio de Ciencia, Innovación y Universidades (España), European Commission, Generalitat de Catalunya, European Research Council, Ministerio de Economía y Competitividad (España), UAM. Departamento de Física Teórica, Everett, S., Yanny, B., Kuropatkin, N., Huff, E. M., Zhang, Y., Myles, J., Masegian, A., Elvin-Poole, J., Allam, S., Bernstein, G. M., Sevilla-Noarbe, I., Splettstoesser, M., Sheldon, E., Jarvis, M., Amon, A., Harrison, I., Choi, A., Hartley, W. G., Alarcon, A., Sanchez, C., Gruen, D., Eckert, K., Prat, J., Tabbutt, M., Busti, V., Becker, M. R., Maccrann, N., Diehl, H. T., Tucker, D. L., Bertin, E., Jeltema, T., Drlica-Wagner, A., Gruendl, R. A., Bechtol, K., Rosell, A. C., Abbott, T. M. C., Aguena, M., Annis, J., Bacon, D., Bhargava, S., Brooks, D., Burke, D. L., Kind, M. C., Carretero, J., Castander, F. J., Conselice, C., Costanzi, M., Da Costa, L. N., Pereira, M. E. S., De Vicente, J., Derose, J., Desai, S., Eifler, T. F., Evrard, A. E., Ferrero, I., Fosalba, P., Frieman, J., Garcia-Bellido, J., Gaztanaga, E., Gerdes, D. W., Gutierrez, G., Hinton, S. R., Hollowood, D. L., Honscheid, K., Huterer, D., James, D. J., Kent, S., Krause, E., Kuehn, K., Lahav, O., Lima, M., Lin, H., Maia, M. A. G., Marshall, J. L., Melchior, P., Menanteau, F., Miquel, R., Mohr, J. J., Morgan, R., Muir, J., Ogando, R. L. C., Palmese, A., Paz-Chinchon, F., Plazas, A. A., Rodriguez-Monroy, M., Romer, A. K., Roodman, A., Sanchez, E., Scarpine, V., Serrano, S., Smith, M., Soares-Santos, M., Suchyta, E., Swanson, M. E. C., Tarle, G., To, C., Troxel, M. A., Varga, T. N., Weller, J., Wilkinson, R. D., Everett, S [0000-0002-3745-2882], Yanny, B [0000-0002-9541-2678], Kuropatkin, N [0000-0003-2511-0946], Huff, EM [0000-0002-9378-3424], Myles, J [0000-0001-6145-5859], Elvin-Poole, J [0000-0001-5148-9203], Bernstein, GM [0000-0002-8613-8259], Sevilla-Noarbe, I [0000-0002-1831-1953], Sheldon, E [0000-0001-9194-0441], Gruen, D [0000-0003-3270-7644], Eckert, K [0000-0002-1407-4700], Becker, MR [0000-0001-7774-2246], Diehl, HT [0000-0002-8357-7467], Tucker, DL [0000-0001-7211-5729], Bertin, E [0000-0002-3602-3664], Jeltema, T [0000-0001-6089-0365], Drlica-Wagner, A [0000-0001-8251-933X], Gruendl, RA [0000-0002-4588-6517], Abbott, TMC [0000-0003-1587-3931], Aguena, M [0000-0001-5679-6747], Annis, J [0000-0002-0609-3987], Carretero, J [0000-0002-3130-0204], Castander, FJ [0000-0001-7316-4573], Conselice, C [0000-0003-1949-7638], Costanzi, M [0000-0001-8158-1449], Derose, J [0000-0002-0728-0960], Fosalba, P [0000-0002-1510-5214], García-Bellido, J [0000-0002-9370-8360], Gaztanaga, E [0000-0001-9632-0815], Gerdes, DW [0000-0001-6942-2736], Hinton, SR [0000-0003-2071-9349], Hollowood, DL [0000-0002-9369-4157], Huterer, D [0000-0001-6558-0112], Kent, S [0000-0003-4207-7420], Kuehn, K [0000-0003-0120-0808], Marshall, JL [0000-0003-0710-9474], Melchior, P [0000-0002-8873-5065], Menanteau, F [0000-0002-1372-2534], Miquel, R [0000-0002-6610-4836], Palmese, A [0000-0002-6011-0530], Paz-Chinchón, F [0000-0003-1339-2683], Romer, AK [0000-0002-9328-879X], Roodman, A [0000-0001-5326-3486], Serrano, S [0000-0002-0211-2861], Soares-Santos, M [0000-0001-6082-8529], Tarle, G [0000-0003-1704-0781], Weller, J [0000-0002-8282-2010], and Apollo - University of Cambridge Repository

Subjects
Cosmology and Nongalactic Astrophysics (astro-ph.CO), FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, 0103 physical sciences, Astrophysics - Cosmology and Nongalactic Astrophysic, Weak, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 1464, 351, 1857, Astrophysics - Cosmology and Nongalactic Astrophysics, Astrophysics - Instrumentation and Methods for Astrophysics, 010303 astronomy & astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM), Gravitational Lensing, 010308 nuclear & particles physics, Física, Astronomy and Astrophysics, Dark Energy, Space and Planetary Science, astro-ph.CO, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], astro-ph.IM
Abstract

DES Collaboration: Everett et al., We describe an updated calibration and diagnostic framework, Balrog, used to directly sample the selection and photometric biases of the Dark Energy Survey (DES) Year 3 (Y3) data set. We systematically inject onto the single-epoch images of a random 20% subset of the DES footprint an ensemble of nearly 30 million realistic galaxy models derived from DES Deep Field observations. These augmented images are analyzed in parallel with the original data to automatically inherit measurement systematics that are often too difficult to capture with generative models. The resulting object catalog is a Monte Carlo sampling of the DES transfer function and is used as a powerful diagnostic and calibration tool for a variety of DES Y3 science, particularly for the calibration of the photometric redshifts of distant "source" galaxies and magnification biases of nearer "lens" galaxies. The recovered Balrog injections are shown to closely match the photometric property distributions of the Y3 GOLD catalog, particularly in color, and capture the number density fluctuations from observing conditions of the real data within 1% for a typical galaxy sample. We find that Y3 colors are extremely well calibrated, typically within ∼1–8 mmag, but for a small subset of objects, we detect significant magnitude biases correlated with large overestimates of the injected object size due to proximity effects and blending. We discuss approaches to extend the current methodology to capture more aspects of the transfer function and reach full coverage of the survey footprint for future analyses., S.E. and T.J. acknowledge support from the U.S. Department of Energy, Office of Science, Office of High Energy Physics, under award numbers DESC0010107 and A00-1465-001. Funding for the DES Projects has been provided by the US Department of Energy, the US 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, Financiadora de Estudos e Projetos, Fundação 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 Forschungsgemeinschaft and the Collaborating Institutions in the Dark Energy Survey. The Collaborating Institutions are Argonne National Laboratory, the University of California at Santa Cruz, the University of Cambridge, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas-Madrid, the University of Chicago, University College London, the DES-Brazil Consortium, the University of Edinburgh, the Eidgenössische Technische Hochschule (ETH) Zürich, Fermi National Accelerator Laboratory, the University of Illinois at Urbana-Champaign, the Institut de Ciències de l'Espai (IEEC/CSIC), the Institut de Física d'Altes Energies, Lawrence Berkeley National Laboratory, the Ludwig-Maximilians Universität München and the associated Excellence Cluster Universe, the University of Michigan, NFS's NOIRLab, the University of Nottingham, The Ohio State University, the University of Pennsylvania, the University of Portsmouth, SLAC National Accelerator Laboratory, Stanford University, the University of Sussex, Texas A&M University, and the OzDES Membership Consortium. Based in part on observations at Cerro Tololo Inter-American Observatory at NSF's NOIRLab (NOIRLab Prop. ID 2012B-0001; PI: J. Frieman), which is managed by the Association of Universities for Research in Astronomy (AURA) under a cooperative agreement with the National Science Foundation. The DES data management system is supported by the National Science Foundation under grant Nos. 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). This manuscript has been authored by Fermi Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the US Department of Energy, Office of Science, Office of High Energy Physics.

Published
2021

6. The Dark Energy Survey: Data Release 1

Author

Abbott, TMC, Abdalla, FB, Allam, S, Amara, A, Annis, J, Asorey, J, Avila, S, Ballester, O, Banerji, M, Barkhouse, W, Baruah, L, Baumer, M, Bechtol, K, Becker, MR, Benoit-Lévy, A, Bernstein, GM, Bertin, E, Blazek, J, Bocquet, S, Brooks, D, Brout, D, Buckley-Geer, E, Burke, DL, Busti, V, Campisano, R, Cardiel-Sas, L, Rosell, AC, Kind, MC, Carretero, J, Castander, FJ, Cawthon, R, Chang, C, Chen, X, Conselice, C, Costa, G, Crocce, M, Cunha, CE, D'Andrea, CB, Costa, LND, Das, R, Daues, G, Davis, TM, Davis, C, Vicente, JD, Depoy, DL, Derose, J, Desai, S, Diehl, HT, Dietrich, JP, Dodelson, S, Doel, P, Drlica-Wagner, A, Eifler, TF, Elliott, AE, Evrard, AE, Farahi, A, Neto, AF, Fernandez, E, Finley, DA, Flaugher, B, Foley, RJ, Fosalba, P, Friedel, DN, Frieman, J, Garcia-Bellido, J, Gaztanaga, E, Gerdes, DW, Giannantonio, T, Gill, MSS, Glazebrook, K, Goldstein, DA, Gower, M, Gruen, D, Gruendl, RA, Gschwend, J, Gupta, RR, Gutierrez, G, Hamilton, S, Hartley, WG, Hinton, Hislop, JM, Hollowood, D, Honscheid, K, Hoyle, B, Huterer, D, Jain, B, James, DJ, Jeltema, T, Johnson, MWG, Johnson, MD, Kacprzak, T, Kent, S, Khullar, G, Klein, M, Kovacs, A, Koziol, AMG, Krause, E, Kremin, A, Kron, R, Kuehn, K, Annis, J [0000-0002-0609-3987], Bocquet, S [0000-0002-4900-805X], Brooks, D [0000-0002-8458-5047], Burke, DL [0000-0003-1866-1950], Kind, MC [0000-0002-4802-3194], Castander, FJ [0000-0001-7316-4573], Conselice, C [0000-0003-1949-7638], Derose, J [0000-0002-0728-0960], Drlica-Wagner, A [0000-0001-8251-933X], Garcia-Bellido, J [0000-0002-9370-8360], Gerdes, DW [0000-0001-6942-2736], Glazebrook, K [0000-0002-3254-9044], Goldstein, DA [0000-0003-3461-8661], Gruen, D [0000-0003-3270-7644], Gruendl, RA [0000-0002-4588-6517], Hamilton, S [0000-0002-6126-8487], Hollowood, D [0000-0002-9369-4157], Kuehn, K [0000-0003-0120-0808], and Apollo - University of Cambridge Repository

Subjects
astro-ph.SR, image processing [techniques], astro-ph.GA, Organic Chemistry, Molecular, techniques: image processing, astronomical databases: miscellaneous, miscellaneous [astronomical databases], Astronomy & Astrophysics, Physical Chemistry, Atomic, observations [cosmology], photometric [techniques], techniques: photometric, Particle and Plasma Physics, surveys, cosmology: observations, astro-ph.CO, Nuclear, Astronomical and Space Sciences, catalogs, astro-ph.IM, Physical Chemistry (incl. Structural)
Abstract

We describe the first public data release of the Dark Energy Survey, DES DR1, consisting of reduced single-epoch images, co-added images, co-added source catalogs, and associated products and services assembled over the first 3 yr of DES science operations. DES DR1 is based on optical/near-infrared imaging from 345 distinct nights (2013 August to 2016 February) by the Dark Energy Camera mounted on the 4 m Blanco telescope at the Cerro Tololo Inter-American Observatory in Chile. We release data from the DES wide-area survey covering ∼5000 deg2 of the southern Galactic cap in five broad photometric bands, grizY. DES DR1 has a median delivered point-spread function of g = 1.12, r = 0.96, i = 0.88, z = 0.84, and Y = 0.″90 FWHM, a photometric precision of

Published
2019
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7. First Cosmology Results using Type Ia Supernovae from the Dark Energy Survey: Constraints on Cosmological Parameters

Author

Abbott, TMC, Allam, S, Andersen, P, Angus, C, Asorey, J, Avelino, A, Avila, S, Bassett, BA, Bechtol, K, Bernstein, GM, Bertin, E, Brooks, D, Brout, D, Brown, P, Burke, DL, Calcino, J, Rosell, AC, Carollo, D, Carrasco Kind, M, Carretero, J, Casas, R, Castander, FJ, Cawthon, R, Challis, P, Childress, M, Clocchiatti, A, Cunha, CE, D'Andrea, CB, Da Costa, LN, Davis, C, Davis, TM, De Vicente, J, Depoy, DL, Desai, S, Diehl, HT, Doel, P, Drlica-Wagner, A, Eifler, TF, Evrard, AE, Fernandez, E, Filippenko, AV, Finley, DA, Flaugher, B, Foley, RJ, Fosalba, P, Frieman, J, Galbany, L, García-Bellido, J, Gaztanaga, E, Giannantonio, T, Glazebrook, K, Goldstein, DA, González-Gaitán, S, Gruen, D, Gruendl, RA, Gschwend, J, Gupta, RR, Gutierrez, G, Hartley, WG, Hinton, Hollowood, DL, Honscheid, K, Hoormann, JK, Hoyle, B, James, DJ, Jeltema, T, Johnson, MWG, Johnson, MD, Kasai, E, Kent, S, Kessler, R, Kim, AG, Kirshner, RP, Kovacs, E, Krause, E, Kron, R, Kuehn, K, Kuhlmann, S, Kuropatkin, N, Lahav, O, Lasker, J, Lewis, GF, Li, TS, Lidman, C, Lima, M, Lin, H, Macaulay, E, Maia, MAG, Mandel, KS, March, M, Marriner, J, Marshall, JL, Martini, P, Menanteau, F, Miller, CJ, Miquel, R, Miranda, V, Mohr, JJ, Morganson, E, Muthukrishna, D, Avelino, A [0000-0002-2938-7822], Brooks, D [0000-0002-8458-5047], Brout, D [0000-0001-5201-8374], Brown, P [0000-0001-6272-5507], Carrasco Kind, M [0000-0002-4802-3194], Castander, FJ [0000-0001-7316-4573], D'Andrea, CB [0000-0002-8198-0332], Drlica-Wagner, A [0000-0001-8251-933X], Filippenko, AV [0000-0003-3460-0103], Galbany, L [0000-0002-1296-6887], Glazebrook, K [0000-0002-3254-9044], Goldstein, DA [0000-0003-3461-8661], Gruendl, RA [0000-0002-4588-6517], Hinton, SR [0000-0003-2071-9349], Hollowood, DL [0000-0002-9369-4157], Kessler, R [0000-0003-3221-0419], Kuehn, K [0000-0003-0120-0808], Lewis, GF [0000-0003-3081-9319], Lidman, C [0000-0003-1731-0497], Mandel, KS [0000-0001-9846-4417], Marshall, JL [0000-0003-0710-9474], Martini, P [0000-0002-4279-4182], Miquel, R [0000-0002-6610-4836], Morganson, E [0000-0001-7180-109X], and Apollo - University of Cambridge Repository

Subjects
Affordable and Clean Energy, astro-ph.CO, Astronomical And Space Sciences, Astronomy & Astrophysics, dark energy, dark matter
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 ΛCDM model we find a matter density Ω 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 ω m = 0.321 ± 0.018. For a flat w 0 w a CDM model, and combining probes from SN Ia, CMB and baryon acoustic oscillations, we find w0 = -0.885 ± 0.114 and w a = -0.387 ± 0.430. These results are in agreement with a cosmological constant and with previous constraints using SNe Ia (Pantheon, JLA).

Published
2019

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