FRB20180916B-20221211-S001-R001-R-040621.fts

upper limit SN vs magnitude graph from USNO-B1 catalog

UT upper limit 2022-12-11 19:06:23.449 15.641 +/- 3.423 (3sigma) 14.893 +/- 3.434 (5sigma) 13.878 +/- 3.455 (10sigma)