NOAO >   Observing Info >   Approved Programs >   2020A-0399

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Program Information for 2020A-0399


PI: Alfredo Zenteno, NOIRLab, alfredo.zenteno@noirlab.edu
Address: CTIO, Juan Cisternas 1500, La Serena Chile

CoI: Regis Cartier, NOIRLab
CoI: Kathy Vivas, NOIRLab
CoI: Rodrigo Carrasco, NOIRLab
CoI: Marcelle Soares-Santos, Brandeis U.
CoI: Alex Drlica-Wagner, FNAL
CoI: Arjun Dey, NOIRLab
CoI: Scott Anderson, U. of Washington
CoI: W. Niel Brandt, Pennsylvania State U.
CoI: Jose L Nilo Castellon, Universidad de La Serena
CoI: Valeria Mesa, Universidad de La Serena
CoI: Hector Cuevas, Universidad de La Serena
CoI: Amelia Ramirez, Universidad de La Serena
CoI: Patricia Arevalo, Universidad de Valparaiso
CoI: Joseph Mohr, Ludwig-Maximilians-Universitat, Munich, Germany
CoI: Matthias Klein, Ludwig-Maximilians-Universitat, Munich, Germany
CoI: Sebastian Grandis, Ludwig-Maximilians-Universitat, Munich, Germany
CoI: Daniel Hernandez-Lang, Ludwig-Maximilians-Universitat, Munich, Germany
CoI: Andrea Merloni, Max Planck Institut fuer extraterrestrische Physik
CoI: M Salvato, Max Planck Institut fuer extraterrestrische Physik
CoI: Johan Comparat, Max Planck Institut fuer extraterrestrische Physik
CoI: Tom Dwelly, Max Planck Institut fuer extraterrestrische Physik
CoI: Nicola Napolitano, National Institute of Astrophysics, Napoli, Italy
CoI: Mario Radovich, National Institute of Astrophysics, Padova, Italy
CoI: Richard McMahon, University of Cambridge

Title: The DECam eROSITA Survey (DeROSITAS)

Abstract: The eROSITA X--ray telescope was launched on {bf July 13th, 2019}, and will soon arrive at L2. Once there, it will perform a 4 year all- sky survey, identifying $sim 10^5$ galaxy clusters more massive than 10$^{rm 14}$ M$_odot$ and $sim 3times 10^6$ AGN. We request 14 nights in 2020A to complete our DECam survey designed to provide optical imaging of the German eROSITA extragalactic sky. Reaching depths of $m^*+1$ for redshift $zsim1$ cluster red-sequence galaxies, these data will enable the optical confirmation and photometric redshift estimation of $sim 5times10^4$ clusters and identification of .5times10^6$ AGN. With a depth of $g=22.7$, $r=23.0$, $i=23.0$, $z=22.3$ at 10$sigma$, we will be able to identify the optical counterparts of the clusters and compute robust cluster redshifts. The completed DECam eROSITA Survey will reduce the uncertainties on the Dark Energy equation of state parameters to $sigma_wsimeq0.10$ for eROSITA clusters alone. With the proposed observations we will study (1) the cluster baryon content and its trends with mass and redshift and (2) the cluster galaxy populations, characterizing the faint end of the cluster luminosity function (at $m^*+2$) as a function of the cluster dynamical state as a function of redshift and mass up to $zsim0.9$. In addition, the proposed observations we will provide (1) targets for approved spectroscopic surveys of eROSITA sources (e.g., 4MOST and SDSS-V), (2) high quality templates for Gravitational Wave progenitor searches, and (3) an initial epoch for the LSST sky survey.

Program Type: Standard/Extragalactic

Scheduled Nights:
Run 1 (2020A):  CT-4m/DECam -- 10.5n on Feb 08 - Feb 10 2020, Feb 13 2020, Mar 04 2020, Mar 07 - Mar 08 2020, Mar 18 2020, Apr 03 - Apr 05 2020, May 07 2020, Jun 30 - Jul 01 2020, Jul 03 2020, Jul 05 2020, Jul 29 2020, Jul 31 2020
Run 2 (2020A):  CT-4m/DECam -- 8.5n on Feb 01 - Feb 04 2020, Feb 14 - Feb 15 2020, Feb 26 2020, Feb 28 2020, Mar 16 - Mar 17 2020, Apr 28 2020, Apr 30 2020, Jun 29 2020


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