FRB20190417A-20221210-S001-R001-R-194540.fts
upper limit SN vs magnitude graph from USNO-B1 catalog
UT upper limit
2022-12-10 10:45:42.960
14.925 +/- 1.633 (3sigma)
14.362 +/- 1.636 (5sigma)
13.598 +/- 1.642 (10sigma)