The DECam eROSITA Survey (DeROSITAS)

The DECam eROSITA Survey (DeROSITAS) [1]

2019-2020:

DeROSITAS is an optical followup [2] survey designed to fill the entire eROSITA-DE sky to griz magnitude of 22.7 (23.5), 23.2 (24.0), 23.3 (24.0), 22.5 (23.2) AB magnitudes at 10(5) sigmas. If those were taken under dark conditions at the zenith (teff [3] =1) the exposure times would be tg = 25s, tr = 75s, ti = 180s, and tz = 170s.

out-of-date (2017):

DeROSITAS is an optical followup [2] survey designed to fill the entire eROSITA-DE sky to griz magnitude of 22.7 (23.5), 23.0 (23.8), 22.4 (23.2), 21.9 (22.7) AB magnitudes at 10(5) sigmas. This is equivalent to tg = 90s, tr = 160s, ti = 110s, and tz = 140s exposure times in grey to bright conditions. If those were taken under dark conditions at the zenith (teff =1) the exposure times would be tg = 25s, tr = 75s, ti = 70s, and tz = 90s.

Here we describe the program progress (coverage and depth). Those plots were created using a (local) search in the DECam database.

The sky (and the current coverage as 20210906) in g,r,i, and z are:

Other Surveys:

Pan-STARR [4] depths: grizy < 23.3, 23.2, 23.1, 22.3, 21.3 (3pi stack 5 sigma)

VST-ATLAS [5] depths are similar to SDSS.

We can cover 1000 deg2 in 2.5n (check out this excel ETC [6]).

Links
[1] http://www.ctio.noao.edu/noao/content/derositas
[2] https://www.noao.edu/noaoprop/abstract.mpl?2018A-0386
[3] https://www.osti.gov/biblio/1250877/
[4] https://panstarrs.stsci.edu
[5] http://astro.dur.ac.uk/Cosmology/vstatlas/
[6] http://www.ctio.noao.edu/noao/sites/default/files/people/azenteno/DECam_ETC-ARW7_eROSITA_mstarPlus1_z0.8.xls