E-resources
Peer reviewed
Open access
-
Zhou, Rongpu; Dey, Biprateep; Newman, Jeffrey A.; Eisenstein, Daniel J.; Dawson, K.; Bailey, S.; Berti, A.; Guy, J.; Lan, Ting-Wen; Zou, H.; Aguilar, J.; Ahlen, S.; Alam, Shadab; Brooks, D.; de la Macorra, A.; Dey, A.; Dhungana, G.; Fanning, K.; Font-Ribera, A.; Gontcho, S. Gontcho A.; Honscheid, K.; Ishak, Mustapha; Kisner, T.; Kovács, A.; Kremin, A.; Landriau, M.; Levi, Michael E.; Magneville, C.; Manera, Marc; Martini, P.; Meisner, Aaron M.; Miquel, R.; Moustakas, J.; Myers, Adam D.; Nie, Jundan; Palanque-Delabrouille, N.; Percival, W. J.; Poppett, C.; Prada, F.; Raichoor, A.; Ross, A. J.; Schlafly, E.; Schlegel, D.; Schubnell, M.; Tarlé, Gregory; Weaver, B. A.; Wechsler, R. H.; Yéche, Christophe; Zhou, Zhimin
The Astronomical journal, 02/2023, Volume: 165, Issue: 2Journal Article
Abstract The Dark Energy Spectroscopic Instrument (DESI) is carrying out a five-year survey that aims to measure the redshifts of tens of millions of galaxies and quasars, including 8 million luminous red galaxies (LRGs) in the redshift range 0.4 < z ≲ 1.0. Here we present the selection of the DESI LRG sample and assess its spectroscopic performance using data from Survey Validation (SV) and the first two months of the Main Survey. The DESI LRG sample, selected using g , r , z , and W 1 photometry from the DESI Legacy Imaging Surveys, is highly robust against imaging systematics. The sample has a target density of 605 deg −2 and a comoving number density of 5 × 10 −4 h 3 Mpc −3 in 0.4 < z < 0.8; this is a significantly higher density than previous LRG surveys (such as SDSS, BOSS, and eBOSS) while also extending to z ∼ 1. After applying a bright star veto mask developed for the sample, 98.9% of the observed LRG targets yield confident redshifts (with a catastrophic failure rate of 0.2% in the confident redshifts), and only 0.5% of the LRG targets are stellar contamination. The LRG redshift efficiency varies with source brightness and effective exposure time, and we present a simple model that accurately characterizes this dependence. In the appendices, we describe the extended LRG samples observed during SV.
Author
![loading ... loading ...](themes/default/img/ajax-loading.gif)
Shelf entry
Permalink
- URL:
Impact factor
Access to the JCR database is permitted only to users from Slovenia. Your current IP address is not on the list of IP addresses with access permission, and authentication with the relevant AAI accout is required.
Year | Impact factor | Edition | Category | Classification | ||||
---|---|---|---|---|---|---|---|---|
JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
Select the library membership card:
If the library membership card is not in the list,
add a new one.
DRS, in which the journal is indexed
Database name | Field | Year |
---|
Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
---|
Source: Personal bibliographies
and: SICRIS
The material is available in full text. If you wish to order the material anyway, click the Continue button.