BL_Lacertae-20201218-S001-R001-B-173713.fts

Only less than 50 stars was detected

BL_Lacertae-20201218-S001-R001-I-173312.fts

relative photometry graph from USNO-B1 catalog

Date UT magnitude mag_erorr 2020-12-18 08:33:13 16.49 0.026

BL_Lacertae-20201218-S001-R001-R-173429.fts

relative photometry graph from USNO-B1 catalog

Date UT magnitude mag_erorr 2020-12-18 08:34:30 14.23 0.092

BL_Lacertae-20201218-S001-R001-V-173544.fts

Only less than 50 stars was detected