OJ_248-20181219-S001-R001-B-043153.fts

Only less than 50 stars was detected

OJ_248-20181219-S001-R001-I-042808.fts

upper limit SN vs magnitude graph from USNO-B1 catalog

UT upper limit 2018-12-19 19:28:10 16.045 +/- 1.169 (3sigma) 15.422 +/- 1.171 (5sigma) 14.576 +/- 1.176 (10sigma)

OJ_248-20181219-S001-R001-R-042923.fts

upper limit SN vs magnitude graph from USNO-B1 catalog

UT upper limit 2018-12-19 19:29:24 16.107 +/- 1.125 (3sigma) 15.448 +/- 1.128 (5sigma) 14.554 +/- 1.132 (10sigma)

OJ_248-20181219-S001-R001-V-043039.fts