Mrk_501-20181116-S001-R001-B-184616.fts
No WCS


Mrk_501-20181116-S001-R001-I-185011.fts
Only less than 50 stars was detected


Mrk_501-20181116-S001-R001-R-184855.fts
Only less than 50 stars was detected


Mrk_501-20181116-S001-R001-V-184731.fts
Only less than 50 stars was detected