The Dark Energy Spectroscopic Instrument (DESI) will execute a nearly magnitude-limited survey of low redshift galaxies (0.05≤z≤0.4, median z≈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 ∼800 objects/deg2 for the BRIGHT and ∼600 objects/deg2 for the FAINT selections.A full characterization of the BGS selection can be found in Ruiz-Macias et al. (2020).
@article{arxiv.2010.11283,
title = {Preliminary Target Selection for the DESI Bright Galaxy Survey (BGS)},
author = {Omar Ruiz-Macias and Pauline Zarrouk and Shaun Cole and Peder Norberg and Carlton Baugh and David Brooks and Arjun Dey and Yutong Duan and Sarah Eftekharzadeh and Daniel J. Eisenstein and Jaime E. Forero-Romero and Enrique Gaztañaga and ChangHoon Hahn and Robert Kehoe and Martin Landriau and Dustin Lang and Michael E. Levi and John Lucey and Aaron M. Meisner and John Moustakas and Adam D. Myers and Nathalie Palanque-Delabrouille and Claire Poppett and Francisco Prada and Anand Raichoor and David J. Schlegel and Michael Schubnell and Gregory Tarlé and David H. Weinberg and M. J. Wilson and Christophe Yèche},
journal= {arXiv preprint arXiv:2010.11283},
year = {2020}
}