FRB20180916B-20221118-S001-R001-R-233121.fts

upper limit SN vs magnitude graph from USNO-B1 catalog

UT upper limit 2022-11-18 14:31:25.280 16.366 +/- 0.743 (3sigma) 15.741 +/- 0.744 (5sigma) 14.893 +/- 0.747 (10sigma)