Data Release 9 of the DESI Legacy Imaging Surveys
ORAL
Abstract
The Dark Energy Spectroscopic Instrument (DESI) will soon begin a redshift survey of more than 30 million galaxies and quasars to constrain the Universe's expansion history over most of cosmic time. The DESI collaboration is using a combination of optical and infrared imaging to select targets for spectroscopic follow-up. In the optical, DESI targeting relies on $g$, $r$ and $z$-band images from the Dark Energy Camera Legacy Survey, the Mayall $z$-band Legacy Survey and the Beijing-Arizona Sky Survey, which are collectively known as the DESI Legacy Surveys (www.legacysurvey.org). These imaging data sets are combined with infrared imaging from the Wide-field Infrared Survey Explorer (WISE) satellite to produce an extremely rich inference-based catalog of sources in the sky. I will present an overview of Data Release 9 (DR9) of the Legacy Surveys, the final Data Release that will be considered for use in DESI target selection. Beyond DESI targeting, the Legacy Surveys have been, and will continue to be, a rich resource for scientific discovery in their own right.
*ADM was supported by the U.S. Department of Energy, Office of Science, Office of High Energy Physics, under Award Number DE-SC0019022. See also http://www.legacysurvey.org/acknowledgment/.
–