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First cosmology results using Supernovae Ia from the Dark Energy Survey: Survey overview, performance, and Supernova spectroscopy

First cosmology results using Supernovae Ia from the Dark Energy Survey: Survey overview, performance, and Supernova spectroscopy
First cosmology results using Supernovae Ia from the Dark Energy Survey: Survey overview, performance, and Supernova spectroscopy
We present details on the observing strategy, data-processing techniques, and spectroscopic targeting algorithms for the first three years of operation for the Dark Energy Survey Supernova Program(DES-SN). This five-year program using the Dark Energy Camera mounted on the 4 m Blanco telescope in Chile was designed to discover and follow supernovae (SNe) Ia over a wide redshift range (0.05 < z < 1.2) to measure the equation-of-state parameter of dark energy. We describe the SN program in full: strategy, observations, data reduction, spectroscopic follow-up observations, and classification. From three seasons of data, we have discovered 12,015 likely SNe, 308 of which have been spectroscopically confirmed, including 251 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 Iawe have classified. The data presented here are used for the first cosmology analysis by DES-SN ("DES-SN3YR"), the results of which are given in Dark Energy Survey Collaboration et al. The 489 spectra that are used to define the DES-SN3YR sample are publicly available athttps://des.ncsa.illinois.edu/releases/sn.
Type Ia supernovae, Supernovae, Cosmology, Cosmological parameters, Observational cosmology, Sky surveys, 1728, 1668, 343, 339, 1146, 1464
1538-3881
267-287
Smith, M.
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D'Andrea, C. B.
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Sullivan, M.
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Möller, A.
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Nichol, R. C.
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Kim, A. G.
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Sako, M.
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Castander, F. J.
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Filippenko, A. V.
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Foley, R. J.
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Galbany, L.
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González-Gaitán, S.
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Kirshner, R. P.
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Lidman, C.
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Scolnic, D.
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Asorey, J.
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Carollo, D.
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Casas, R.
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Challis, P.
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Childress, M.
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Clocchiatti, A.
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Crawford, S.
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Frohmaier, C.
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Glazebrook, K.
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Goldstein, D. A.
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Graham, M. L.
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Hoormann, J. K.
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Kuehn, K.
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Mandel, K. S.
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Morganson, E.
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Muthukrishna, D.
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Nugent, P.
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Pursiainen, M.
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Sommer, N. E.
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Swann, E.
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Tucker, B. E.
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Uddin, S. A.
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Wiseman, P.
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Annis, J.
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The Dark Energy Survey Collaboration
Smith, M.
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D'Andrea, C. B.
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Sullivan, M.
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Möller, A.
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Nichol, R. C.
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Kim, A. G.
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Sako, M.
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Castander, F. J.
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Filippenko, A. V.
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Foley, R. J.
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Galbany, L.
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González-Gaitán, S.
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Kasai, E.
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Kirshner, R. P.
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Lidman, C.
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Scolnic, D.
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Brout, D.
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Gupta, R. R.
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Hinton, S. R.
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Kessler, R.
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Lasker, J.
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Macaulay, E.
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Wolf, R. C.
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Asorey, J.
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Avelino, A.
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Bassett, B. A.
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Calcino, J.
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Carollo, D.
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Casas, R.
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Challis, P.
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Childress, M.
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Clocchiatti, A.
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Crawford, S.
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Frohmaier, C.
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Glazebrook, K.
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Goldstein, D. A.
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Graham, M. L.
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Hoormann, J. K.
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Kuehn, K.
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Mandel, K. S.
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Morganson, E.
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Muthukrishna, D.
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Nugent, P.
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Pursiainen, M.
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Sommer, N. E.
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Swann, E.
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Tucker, B. E.
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Uddin, S. A.
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Wiseman, P.
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Annis, J.
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Smith, M., D'Andrea, C. B., Sullivan, M., Möller, A., Nichol, R. C., Kim, A. G., 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., Gupta, R. R., Hinton, S. R., Kessler, R., Lasker, J., Macaulay, E., Wolf, R. C., Asorey, J., Avelino, A., Bassett, B. A., Calcino, J., Carollo, D., Casas, R., Challis, P., Childress, M., Clocchiatti, A., Crawford, S., Frohmaier, C., Glazebrook, K., Goldstein, D. A., Graham, M. L., Hoormann, J. K., Kuehn, K., Mandel, K. S., Morganson, E., Muthukrishna, D., Nugent, P., Pursiainen, M., Sommer, N. E., Swann, E., Tucker, B. E., Uddin, S. A., Wiseman, P. and Annis, J. , The Dark Energy Survey Collaboration (2020) First cosmology results using Supernovae Ia from the Dark Energy Survey: Survey overview, performance, and Supernova spectroscopy. The Astronomical Journal, 160 (6), 267-287. (doi:10.3847/1538-3881/abc01b).

Record type: Article

Abstract

We present details on the observing strategy, data-processing techniques, and spectroscopic targeting algorithms for the first three years of operation for the Dark Energy Survey Supernova Program(DES-SN). This five-year program using the Dark Energy Camera mounted on the 4 m Blanco telescope in Chile was designed to discover and follow supernovae (SNe) Ia over a wide redshift range (0.05 < z < 1.2) to measure the equation-of-state parameter of dark energy. We describe the SN program in full: strategy, observations, data reduction, spectroscopic follow-up observations, and classification. From three seasons of data, we have discovered 12,015 likely SNe, 308 of which have been spectroscopically confirmed, including 251 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 Iawe have classified. The data presented here are used for the first cosmology analysis by DES-SN ("DES-SN3YR"), the results of which are given in Dark Energy Survey Collaboration et al. The 489 spectra that are used to define the DES-SN3YR sample are publicly available athttps://des.ncsa.illinois.edu/releases/sn.

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Accepted/In Press date: 10 October 0220
Published date: 18 November 2020
Keywords: Type Ia supernovae, Supernovae, Cosmology, Cosmological parameters, Observational cosmology, Sky surveys, 1728, 1668, 343, 339, 1146, 1464
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Identifiers

Local EPrints ID: 470507
URI: http://eprints.soton.ac.uk/id/eprint/470507
DOI: doi:10.3847/1538-3881/abc01b
ISSN: 1538-3881
PURE UUID: b063433c-372f-4e82-886b-9f613570ede9
ORCID for M. Sullivan: ORCID iD orcid.org/0000-0001-9053-4820
ORCID for P. Wiseman: ORCID iD orcid.org/0000-0002-3073-1512

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Date deposited: 12 Oct 2022 16:31
Last modified: 12 Nov 2024 02:57

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Contributors

Author: M. Smith
Author: C. B. D'Andrea
Author: M. Sullivan ORCID iD
Author: A. Möller
Author: R. C. Nichol
Author: A. G. Kim
Author: M. Sako
Author: F. J. Castander
Author: A. V. Filippenko
Author: R. J. Foley
Author: L. Galbany
Author: S. González-Gaitán
Author: E. Kasai
Author: R. P. Kirshner
Author: C. Lidman
Author: D. Scolnic
Author: D. Brout
Author: R. R. Gupta
Author: S. R. Hinton
Author: R. Kessler
Author: J. Lasker
Author: E. Macaulay
Author: R. C. Wolf
Author: J. Asorey
Author: A. Avelino
Author: B. A. Bassett
Author: J. Calcino
Author: D. Carollo
Author: R. Casas
Author: P. Challis
Author: M. Childress
Author: A. Clocchiatti
Author: S. Crawford
Author: C. Frohmaier
Author: K. Glazebrook
Author: D. A. Goldstein
Author: M. L. Graham
Author: J. K. Hoormann
Author: K. Kuehn
Author: K. S. Mandel
Author: E. Morganson
Author: D. Muthukrishna
Author: P. Nugent
Author: M. Pursiainen
Author: N. E. Sommer
Author: E. Swann
Author: B. E. Tucker
Author: S. A. Uddin
Author: P. Wiseman ORCID iD
Author: J. Annis
Corporate Author: The Dark Energy Survey Collaboration

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