The DECam eROSITA Survey (DeROSITAS)

2019-2020:  
DeROSITAS is an optical followup 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 =1) the exposure times  would be tg = 25s, tr = 75s, ti = 180s, and tz = 170s. 
 
out-of-date (2017): 
DeROSITAS is an optical followup 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 depths: grizy < 23.3, 23.2, 23.1, 22.3, 21.3 (3pi stack 5 sigma)

VST-ATLAS depths are similar to SDSS.

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