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20 April 2024

» arxiv » 2010.11283

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Preliminary Target Selection for the DESI Bright Galaxy Survey (BGS)
Omar Ruiz-Macias ; Pauline Zarrouk ; Shaun Cole ; Peder Norberg ; Carlton Baugh ; David Brooks ; Arjun Dey ; Yutong Duan ; Sarah Eftekharzadeh ; Daniel J. Eisenstein ; Jaime E. Forero-Romero ; Enrique Gaztañaga ; ChangHoon Hahn ; Robert Kehoe ; Martin Landriau ; Dustin Lang ; Michael E. Levi ; John Lucey ; Aaron M. Meisner ; John Moustakas ; Adam D. Myers ; Nathalie Palanque-Delabrouille ; Claire Poppett ; Francisco Prada ; Anand Raichoor ; David J. Schlegel ; Michael Schubnell ; Gregory Tarlé ; David H. Weinberg ; M. J. Wilson ; Christophe Yèche ;
Date:	21 Oct 2020
Abstract:	The Dark Energy Spectroscopic Instrument (DESI) will execute a nearly magnitude-limited survey of low redshift galaxies ($0.05 leq z leq 0.4$, median $z approx 0.2$). Clustering analyses of this Bright Galaxy Survey (BGS) will yield the most precise measurements to date of baryon acoustic oscillations and redshift-space distortions at low redshift. DESI BGS will comprise two target classes: (i) BRIGHT ($r<19.5$~mag), and (ii) FAINT ($19.5<r<20$~mag). Here we present a summary of the star-galaxy separation, and different photometric and geometrical masks, used in BGS to reduce the number of spurious targets. The selection results in a total density of $sim 800$ objects/deg$^2$ for the BRIGHT and $sim 600$ objects/deg$^2$ for the FAINT selections.A full characterization of the BGS selection can be found in Ruiz-Macias et al. (2020).
Source:	arXiv, 2010.11283
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