FRB20190417A-20221125-S001-R001-R-201304.fts
upper limit SN vs magnitude graph from USNO-B1 catalog
UT upper limit
2022-11-25 11:13:06.200
15.397 +/- 1.141 (3sigma)
14.805 +/- 1.143 (5sigma)
14.002 +/- 1.147 (10sigma)