Photometric Redshifts for the Dark Energy Survey and VISTA and Implications for Large Scale Structure

Details Photometric Redshifts for the Dark Energy Survey and VISTA and Implications for Large Scale Structure Photometric Redshifts for the Dark Energy Survey and VISTA and Implications for Large Scale Structure

2007-11-07

arxiv.org/abs/0711.1059v2

Mon.Not.Roy.Astron.Soc.386:1219-1233,2008

Astronomy and Astrophysics

Astrophysics

17 pages, 15 figures, Accepted for publication in MNRAS

Scientific paper

10.1111/j.1365-2966.2008.13095.x

We conduct a detailed analysis of the photometric redshift requirements for the proposed Dark Energy Survey (DES) using two sets of mock galaxy simulations and an artificial neural network code - ANNz. In particular, we examine how optical photometry in the DES grizY bands can be complemented with near infra-red photometry from the planned VISTA Hemisphere Survey (VHS) in the JHK_s bands. We find that the rms scatter on the photometric redshift estimate over 1

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