Mrk_501-20201128-S001-R001-B-173145.fts

No WCS

Mrk_501-20201128-S001-R001-I-173537.fts

No WCS

Mrk_501-20201128-S001-R001-R-173421.fts

No WCS

Mrk_501-20201128-S001-R001-V-173304.fts

Only less than 50 stars was detected