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OzDES multifibre spectroscopy for the Dark Energy Survey: 3-yr results and first data release

Publication ,  Journal Article
Childress, MJ; Lidman, C; Davis, TM; Tucker, BE; Asorey, J; Yuan, F; Abbott, TMC; Abdalla, FB; Allam, S; Annis, J; Banerji, M; Benoit-Lévy, A ...
Published in: Monthly Notices of the Royal Astronomical Society
November 1, 2017

We present results for the first three years of OzDES, a six year programme to obtain redshifts for objects in the Dark Energy Survey (DES) supernova fields using the 2dF fibre positioner and AAOmega spectrograph on the Anglo-Australian Telescope. OzDES is a multi-object spectroscopic survey targeting multiple types of targets at multiple epochs over a multiyear baseline and is one of the first multi-object spectroscopic surveys to dynamically include transients into the target list soon after their discovery. At the end of three years, OzDES has spectroscopically confirmed almost 100 supernovae, and has measured redshifts for 17 000 objects, including the redshifts of 2566 supernova hosts. We examine how our ability to measure redshifts for targets of various types depends on signal-to-noise ratio (S/N), magnitude and exposure time, finding that our redshift success rate increases significantly at a S/N of 2-3 per 1-Å bin. We also find that the change in S/N with exposure time closely matches the Poisson limit for stacked exposures as long as 10 h. We use these results to predict the redshift yield of the full OzDES survey, as well as the potential yields of future surveys on other facilities such as (i.e. the 4-m Multi-Object Spectroscopic Telescope, the Subaru Prime Focus Spectrograph and the Maunakea Spectroscopic Explorer). This work marks the first OzDES data release, comprising 14 693 redshifts. OzDES is on target to obtain over 30 000 redshifts over the 6-yr duration of the survey, including a yield of approximately 5700 supernova host-galaxy redshifts.

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Published In

Monthly Notices of the Royal Astronomical Society

DOI

EISSN

1365-2966

ISSN

0035-8711

Publication Date

November 1, 2017

Volume

472

Issue

1

Start / End Page

273 / 288

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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Childress, M. J., Lidman, C., Davis, T. M., Tucker, B. E., Asorey, J., Yuan, F., … Wester, W. (2017). OzDES multifibre spectroscopy for the Dark Energy Survey: 3-yr results and first data release. Monthly Notices of the Royal Astronomical Society, 472(1), 273–288. https://doi.org/10.1093/mnras/stx1872
Childress, M. J., C. Lidman, T. M. Davis, B. E. Tucker, J. Asorey, F. Yuan, T. M. C. Abbott, et al. “OzDES multifibre spectroscopy for the Dark Energy Survey: 3-yr results and first data release.” Monthly Notices of the Royal Astronomical Society 472, no. 1 (November 1, 2017): 273–88. https://doi.org/10.1093/mnras/stx1872.
Childress MJ, Lidman C, Davis TM, Tucker BE, Asorey J, Yuan F, et al. OzDES multifibre spectroscopy for the Dark Energy Survey: 3-yr results and first data release. Monthly Notices of the Royal Astronomical Society. 2017 Nov 1;472(1):273–88.
Childress, M. J., et al. “OzDES multifibre spectroscopy for the Dark Energy Survey: 3-yr results and first data release.” Monthly Notices of the Royal Astronomical Society, vol. 472, no. 1, Nov. 2017, pp. 273–88. Scopus, doi:10.1093/mnras/stx1872.
Childress MJ, Lidman C, Davis TM, Tucker BE, Asorey J, Yuan F, Abbott TMC, Abdalla FB, Allam S, Annis J, Banerji M, Benoit-Lévy A, Bernard SR, Bertin E, Brooks D, Buckley-Geer E, Burke DL, Carnero Rosell A, Carollo D, Carrasco Kind M, Carretero J, Castander FJ, Cunha CE, da Costa LN, D’Andrea CB, Doel P, Eifler TF, Evrard AE, Flaugher B, Foley RJ, Fosalba P, Frieman J, García-Bellido J, Glazebrook K, Goldstein DA, Gruen D, Gruendl RA, Gschwend J, Gupta RR, Gutierrez G, Hinton SR, Hoormann JK, James DJ, Kessler R, Kim AG, King AL, Kovacs E, Kuehn K, Kuhlmann S, Kuropatkin N, Lagattuta DJ, Lewis GF, Li TS, Lima M, Lin H, Macaulay E, Maia MAG, Marriner J, March M, Marshall JL, Martini P, McMahon RG, Menanteau F, Miquel R, Moller A, Morganson E, Mould J, Mudd D, Muthukrishna D, Nichol RC, Nord B, Ogando RLC, Ostrovski F, Parkinson D, Plazas AA, Reed SL, Reil K, Romer AK, Rykoff ES, Sako M, Sanchez E, Scarpine V, Schindler R, Schubnell M, Scolnic D, Sevilla-Noarbe I, Seymour N, Sharp R, Smith M, Soares-Santos M, Sobreira F, Sommer NE, Spinka H, Suchyta E, Sullivan M, Swanson MEC, Tarle G, Uddin SA, Walker AR, Wester W. OzDES multifibre spectroscopy for the Dark Energy Survey: 3-yr results and first data release. Monthly Notices of the Royal Astronomical Society. 2017 Nov 1;472(1):273–288.
Journal cover image

Published In

Monthly Notices of the Royal Astronomical Society

DOI

EISSN

1365-2966

ISSN

0035-8711

Publication Date

November 1, 2017

Volume

472

Issue

1

Start / End Page

273 / 288

Related Subject Headings

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