Mrk_501-20201116-S001-R001-B-180507.fts
No WCS


Mrk_501-20201116-S001-R001-I-180856.fts
Only less than 50 stars was detected


Mrk_501-20201116-S001-R001-R-180740.fts
Only less than 50 stars was detected


Mrk_501-20201116-S001-R001-V-180625.fts
Only less than 50 stars was detected