FRB20180916B-20221225-S001-R001-R-221229.fts

upper limit SN vs magnitude graph from USNO-B1 catalog

UT upper limit 2022-12-25 13:12:31.120 16.280 +/- 0.884 (3sigma) 15.626 +/- 0.886 (5sigma) 14.738 +/- 0.889 (10sigma)