Mrk_501-20210411-S001-R001-B-032511.fts

Only less than 50 stars was detected

Mrk_501-20210411-S001-R001-I-032901.fts

relative photometry graph from USNO-B1 catalog

Date UT magnitude mag_erorr 2021-04-11 18:29:02 14.33 0.013

Mrk_501-20210411-S001-R001-R-032744.fts

relative photometry graph from USNO-B1 catalog

Date UT magnitude mag_erorr 2021-04-11 18:27:46 13.64 0.015

Mrk_501-20210411-S001-R001-V-032629.fts