FRB20190209A-20221226-S001-R001-R-030811.fts
upper limit SN vs magnitude graph from USNO-B1 catalog
UT upper limit
2022-12-26 18:08:13.019
16.224 +/- 1.471 (3sigma)
15.640 +/- 1.474 (5sigma)
14.848 +/- 1.479 (10sigma)