FRB20190208A-20221222-S001-R001-R-181738.fts

upper limit SN vs magnitude graph from USNO-B1 catalog

UT upper limit 2022-12-22 09:17:40.158 16.000 +/- 1.134 (3sigma) 15.367 +/- 1.137 (5sigma) 14.507 +/- 1.141 (10sigma)