Mrk_501-20210415-S001-R001-B-034609.fts

Only less than 50 stars was detected

Mrk_501-20210415-S001-R001-I-034959.fts

relative photometry graph from USNO-B1 catalog

Date UT magnitude mag_erorr 2021-04-15 18:50:00 14.52 0.018

Mrk_501-20210415-S001-R001-R-034843.fts

relative photometry graph from USNO-B1 catalog

Date UT magnitude mag_erorr 2021-04-15 18:48:44 13.68 0.018

Mrk_501-20210415-S001-R001-V-034728.fts