FRB20190417A-20221231-S001-R001-R-185155.fts

upper limit SN vs magnitude graph from USNO-B1 catalog

UT upper limit 2022-12-31 09:51:57.710 14.965 +/- 1.663 (3sigma) 14.403 +/- 1.666 (5sigma) 13.639 +/- 1.672 (10sigma)