FRB20190209A-20221224-S001-R001-R-043253.fts

upper limit SN vs magnitude graph from USNO-B1 catalog

UT upper limit 2022-12-24 19:32:57.350 16.237 +/- 1.286 (3sigma) 15.657 +/- 1.288 (5sigma) 14.869 +/- 1.293 (10sigma)