even more fine tuning, 1) NMAD of central 1500:2500,500:1500 pixels of DECam CCD instead of entire CCD for skyrms estimate, 2) photutil's daofind with SN=8 agrees with IDL's daofind with SN=10
even more fine tuning, 1) NMAD of central 1500:2500,500:1500 pixels of DECam CCD instead of entire CCD for skyrms estimate, 2) photutil's daofind with SN=8 agrees with IDL's daofind with SN=10

legacysurvey/legacypipe,legacysurvey/legacypipe