OJ_248-20181221-S001-R001-B-053141.fts

Only less than 50 stars was detected

OJ_248-20181221-S001-R001-I-052750.fts

upper limit SN vs magnitude graph from USNO-B1 catalog

UT upper limit 2018-12-21 20:27:50 16.533 +/- 1.098 (3sigma) 15.813 +/- 1.101 (5sigma) 14.835 +/- 1.106 (10sigma)

OJ_248-20181221-S001-R001-R-052911.fts

upper limit SN vs magnitude graph from USNO-B1 catalog

UT upper limit 2018-12-21 20:29:12 16.589 +/- 0.994 (3sigma) 15.964 +/- 0.996 (5sigma) 15.116 +/- 0.999 (10sigma)

OJ_248-20181221-S001-R001-V-053027.fts