FRB20190222A-20221228-S001-R001-R-194918.fts
upper limit SN vs magnitude graph from USNO-B1 catalog
UT upper limit
2022-12-28 10:49:21.018
15.802 +/- 1.670 (3sigma)
15.175 +/- 1.673 (5sigma)
14.324 +/- 1.680 (10sigma)