FRB20190117A-20221230-S001-R001-R-190952.fts
upper limit SN vs magnitude graph from USNO-B1 catalog
UT upper limit
2022-12-30 10:09:54.179
16.103 +/- 2.079 (3sigma)
15.392 +/- 2.084 (5sigma)
14.427 +/- 2.095 (10sigma)