FRB20180814A-20221208-S001-R001-R-004800.fts
upper limit SN vs magnitude graph from USNO-B1 catalog
UT upper limit
2022-12-08 15:48:02.640
15.151 +/- 1.992 (3sigma)
14.557 +/- 1.996 (5sigma)
13.751 +/- 2.004 (10sigma)