# OzDES multi-object fibre spectroscopy for the Dark Energy Survey: Results and second data release

Abstract : We present a description of the Australian Dark Energy Survey (OzDES) and summarise the results from its six years of operations. Using the 2dF fibre positioner and AAOmega spectrograph on the 3.9-metre Anglo-Australian Telescope, OzDES has monitored 771 AGN, classified hundreds of supernovae, and obtained redshifts for thousands of galaxies that hosted a transient within the 10 deep fields of the Dark Energy Survey. We also present the second OzDES data release, containing the redshifts of almost 30,000 sources, some as faint as $r_{\mathrm AB}=24$ mag, and 375,000 individual spectra. These data, in combination with the time-series photometry from the Dark Energy Survey, will be used to measure the expansion history of the Universe out to $z\sim1.2$ and the masses of hundreds of black holes out to $z\sim4$. OzDES is a template for future surveys that combine simultaneous monitoring of targets with wide-field imaging cameras and wide-field multi-object spectrographs.
Document type :
Journal articles
Domain :

https://hal.archives-ouvertes.fr/hal-02870838
Contributor : Inspire Hep <>
Submitted on : Tuesday, June 16, 2020 - 10:46:29 PM
Last modification on : Wednesday, July 1, 2020 - 8:22:12 PM

### Citation

C. Lidman, B.E. Tucker, T.M. Davis, S.A. Uddin, J. Asorey, et al.. OzDES multi-object fibre spectroscopy for the Dark Energy Survey: Results and second data release. Mon.Not.Roy.Astron.Soc., 2020, 496 (1), pp.19-35. ⟨10.1093/mnras/staa1341⟩. ⟨hal-02870838⟩

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