OzDES multifibre spectroscopy for the Dark Energy Survey: First-year operation and results

Fang Yuan, C. Lidman, T. M. Davis, M. Childress, F. B. Abdalla, M. Banerji, E. Buckley-Geer, A. Carnero Rosell, D. Carollo, F. J. Castander, C. B. D'Andrea, H. T. Diehl, C. E. Cunha, R. J. Foley, J. Frieman, K. Glazebrook, J. Gschwend, S. Hinton, S. Jouvel, R. KesslerA. G. Kim, A. L. King, K. Kuehn, S. Kuhlmann, G. F. Lewis, H. Lin, P. Martini, R. G. McMahon, J. Mould, R. C. Nichol, R. P. Norris, C. R. O'Neill, F. Ostrovski, A. Papadopoulos, D. Parkinson, S. Reed, A. K. Romer, P. J. Rooney, E. Rozo, E. S. Rykoff, M. Sako, R. Scalzo, B. P. Schmidt, D. Scolnic, N. Seymour, R. Sharp, F. Sobreira, M. Sullivan, R. C. Thomas, D. Tucker, S. A. Uddin, R. H. Wechsler, W. Wester, H. Wilcox, B. Zhang, T. Abbott, S. Allam, A. H. Bauer, A. Benoit-Lévy, E. Bertin, D. Brooks, D. L. Burke, M. Carrasco Kind, R. Covarrubias, M. Crocce, L. N. da Costa, D. L. DePoy, S. Desai, P. Doel, T. F. Eifler, A. E. Evrard, A. Fausti Neto, B. Flaugher, P. Fosalba, E. Gaztanaga, D. Gerdes, D. Gruen, R. A. Gruendl, K. Honscheid, D. James, N. Kuropatkin, O. Lahav, T. S. Li, M. A.G. Maia, M. Makler, J. Marshall, C. J. Miller, R. Miquel, R. Ogando, A. A. Plazas, A. Roodman, E. Sanchez, V. Scarpine, M. Schubnell, I. Sevilla-Noarbe, R. C. Smith, M. Soares-Santos, E. Suchyta, M. E.C. Swanson, G. Tarle, J. Thaler, A. R. Walker

Research output: Contribution to journalArticle

47 Scopus citations

Abstract

The Australian Dark Energy Survey (OzDES) is a five-year, 100-night, spectroscopic survey on the Anglo-Australian Telescope, whose primary aim is to measure redshifts of approximately 2500 Type Ia supernovae host galaxies over the redshift range 0.1 < z < 1.2, and derive reverberation-mapped black hole masses for approximately 500 active galactic nuclei and quasars over 0.3 < z < 4.5. This treasure trove of data forms a major part of the spectroscopic follow-up for the Dark Energy Survey for which we are also targeting cluster galaxies, radio galaxies, strong lenses, and unidentified transients, as well as measuring luminous red galaxies and emission line galaxies to help calibrate photometric redshifts. Here,we present an overview of the OzDES programme and our first-year results. Between 2012 December and 2013 December, we observed over 10 000 objects and measured more than 6 000 redshifts. Our strategy of retargeting faint objects across many observing runs has allowed us to measure redshifts for galaxies as faint as mr = 25 mag.We outline our target selection and observing strategy, quantify the redshift success rate for different types of targets, and discuss the implications for our main science goals. Finally, we highlight a few interesting objects as examples of the fortuitous yet not totally unexpected discoveries that can come from such a large spectroscopic survey.

Original languageEnglish (US)
Pages (from-to)3047-3063
Number of pages17
JournalMonthly Notices of the Royal Astronomical Society
Volume452
Issue number3
DOIs
StatePublished - Oct 27 2015

Keywords

  • Cosmology: observations
  • Galaxies: active
  • Supernovae: general
  • Surveys
  • Techniques: spectroscopic

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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    Yuan, F., Lidman, C., Davis, T. M., Childress, M., Abdalla, F. B., Banerji, M., Buckley-Geer, E., Carnero Rosell, A., Carollo, D., Castander, F. J., D'Andrea, C. B., Diehl, H. T., Cunha, C. E., Foley, R. J., Frieman, J., Glazebrook, K., Gschwend, J., Hinton, S., Jouvel, S., ... Walker, A. R. (2015). OzDES multifibre spectroscopy for the Dark Energy Survey: First-year operation and results. Monthly Notices of the Royal Astronomical Society, 452(3), 3047-3063. https://doi.org/10.1093/mnras/stv1507