FRB20190222A-20221214-S001-R001-R-215501.fts

upper limit SN vs magnitude graph from USNO-B1 catalog

UT upper limit 2022-12-14 12:55:03.740 15.818 +/- 2.048 (3sigma) 15.164 +/- 2.053 (5sigma) 14.276 +/- 2.062 (10sigma)