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The dark energy survey 5-yr photometrically identified type Ia supernovae

Publication ,  Journal Article
Möller, A; Smith, M; Sako, M; Sullivan, M; Vincenzi, M; Wiseman, P; Armstrong, P; Asorey, J; Brout, D; Carollo, D; Davis, TM; Frohmaier, C ...
Published in: Monthly Notices of the Royal Astronomical Society
August 1, 2022

As part of the cosmology analysis using Type Ia Supernovae (SN Ia) in the Dark Energy Survey (DES), we present photometrically identified SN Ia samples using multiband light curves and host galaxy redshifts. For this analysis, we use the photometric classification framework SuperNNovatrained on realistic DES-like simulations. For reliable classification, we process the DES SN programme (DES-SN) data and introduce improvements to the classifier architecture, obtaining classification accuracies of more than 98 per cent on simulations. This is the first SN classification to make use of ensemble methods, resulting in more robust samples. Using photometry, host galaxy redshifts, and a classification probability requirement, we identify 1863 SNe Ia from which we select 1484 cosmology-grade SNe Ia spanning the redshift range of 0.07 < z < 1.14. We find good agreement between the light-curve properties of the photometrically selected sample and simulations. Additionally, we create similar SN Ia samples using two types of Bayesian Neural Network classifiers that provide uncertainties on the classification probabilities. We test the feasibility of using these uncertainties as indicators for out-of-distribution candidates and model confidence. Finally, we discuss the implications of photometric samples and classification methods for future surveys such as Vera C. Rubin Observatory Legacy Survey of Space and Time.

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Published In

Monthly Notices of the Royal Astronomical Society

DOI

EISSN

1365-2966

ISSN

0035-8711

Publication Date

August 1, 2022

Volume

514

Issue

4

Start / End Page

5159 / 5177

Related Subject Headings

  • Astronomy & Astrophysics
  • 5109 Space sciences
  • 5107 Particle and high energy physics
  • 5101 Astronomical sciences
  • 0201 Astronomical and Space Sciences
 

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Möller, A., Smith, M., Sako, M., Sullivan, M., Vincenzi, M., Wiseman, P., … Varga, T. N. (2022). The dark energy survey 5-yr photometrically identified type Ia supernovae. Monthly Notices of the Royal Astronomical Society, 514(4), 5159–5177. https://doi.org/10.1093/mnras/stac1691
Möller, A., M. Smith, M. Sako, M. Sullivan, M. Vincenzi, P. Wiseman, P. Armstrong, et al. “The dark energy survey 5-yr photometrically identified type Ia supernovae.” Monthly Notices of the Royal Astronomical Society 514, no. 4 (August 1, 2022): 5159–77. https://doi.org/10.1093/mnras/stac1691.
Möller A, Smith M, Sako M, Sullivan M, Vincenzi M, Wiseman P, et al. The dark energy survey 5-yr photometrically identified type Ia supernovae. Monthly Notices of the Royal Astronomical Society. 2022 Aug 1;514(4):5159–77.
Möller, A., et al. “The dark energy survey 5-yr photometrically identified type Ia supernovae.” Monthly Notices of the Royal Astronomical Society, vol. 514, no. 4, Aug. 2022, pp. 5159–77. Scopus, doi:10.1093/mnras/stac1691.
Möller A, Smith M, Sako M, Sullivan M, Vincenzi M, Wiseman P, Armstrong P, Asorey J, Brout D, Carollo D, Davis TM, Frohmaier C, Galbany L, Glazebrook K, Kelsey L, Kessler R, Lewis GF, Lidman C, Malik U, Nichol RC, Scolnic D, Tucker BE, Abbott TMC, Aguena M, Allam S, Annis J, Bertin E, Bocquet S, Brooks D, Burke DL, Carnero Rosell A, Carrasco Kind M, Carretero J, Castander FJ, Conselice C, Costanzi M, Crocce M, Da Costa LN, De Vicente J, Desai S, Diehl HT, Doel P, Everett S, Ferrero I, Finley DA, Flaugher B, Friedel D, Frieman J, García-Bellido J, Gerdes DW, Gruen D, Gruendl RA, Gschwend J, Gutierrez G, Herner K, Hinton SR, Hollowood DL, Honscheid K, James DJ, Kuehn K, Kuropatkin N, Lahav O, March M, Marshall JL, Menanteau F, Miquel R, Morgan R, Palmese A, Paz-Chinchón F, Pieres A, Plazas Malagón AA, Romer AK, Roodman A, Sanchez E, Scarpine V, Schubnell M, Serrano S, Sevilla-Noarbe I, Suchyta E, Tarle G, Thomas D, To C, Varga TN. The dark energy survey 5-yr photometrically identified type Ia supernovae. Monthly Notices of the Royal Astronomical Society. 2022 Aug 1;514(4):5159–5177.
Journal cover image

Published In

Monthly Notices of the Royal Astronomical Society

DOI

EISSN

1365-2966

ISSN

0035-8711

Publication Date

August 1, 2022

Volume

514

Issue

4

Start / End Page

5159 / 5177

Related Subject Headings

  • Astronomy & Astrophysics
  • 5109 Space sciences
  • 5107 Particle and high energy physics
  • 5101 Astronomical sciences
  • 0201 Astronomical and Space Sciences