Mrk_501-20210424-S001-R001-B-022908.fts

Only less than 50 stars was detected

Mrk_501-20210424-S001-R001-I-023304.fts

relative photometry graph from USNO-B1 catalog

Date UT magnitude mag_erorr 2021-04-24 17:33:05 14.55 0.015

Mrk_501-20210424-S001-R001-R-023147.fts

relative photometry graph from USNO-B1 catalog

Date UT magnitude mag_erorr 2021-04-24 17:31:48 13.69 0.020

Mrk_501-20210424-S001-R001-V-023031.fts

Only less than 50 stars was detected