Preliminary Target Selection for the DESI Bright Galaxy Survey (BGS)

DOI: 
10.3847/2515-5172/abc25a
Publication date: 
03/10/2020
Main author: 
Ruiz-Macias, Omar
IAA authors: 
Prada, Francisco
Authors: 
Ruiz-Macias, Omar;Zarrouk, Pauline;Cole, Shaun;Norberg, Peder;Baugh, Carlton;Brooks, David;Dey, Arjun;Duan, Yutong;Eftekharzadeh, Sarah;Eisenstein, Daniel J.;Forero-Romero, Jaime E.;Gaztañaga, Enrique;Hahn, ChangHoon;Kehoe, Robert;Landriau, Martin;Lang, Dustin;Levi, Michael E.;Lucey, John;Meisner, Aaron M.;Moustakas, John;Myers, Adam D.;Palanque-Delabrouille, Nathalie;Poppett, Claire;Prada, Francisco;Raichoor, Anand;Schlegel, David J.;Schubnell, Michael;Tarlé, Gregory;Weinberg, David H.;Wilson, M. J.;Yèche, Christophe
Journal: 
Research Notes of the American Astronomical Society
Refereed: 
No
Publication type: 
Note
Volume: 
4
Pages: 
187
Abstract: 
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 &lt; 19.5 mag), and (ii) FAINT (19.5 &lt; r &lt; 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 deg<SUP>-2</SUP> for the BRIGHT and ∼600 objects deg<SUP>-2</SUP> for the FAINT selections. A full characterization of the BGS selection can be found in Ruiz-Macias et al.
Database: 
ADS
URL: 
https://ui.adsabs.harvard.edu/#abs/2020RNAAS...4..187R/abstract
ADS Bibcode: 
2020RNAAS...4..187R
Keywords: 
Galaxies;Redshift surveys;Observational cosmology;Large-scale structure of the universe;Catalogs;573;1378;1146;902;205;Astrophysics - Astrophysics of Galaxies