FRB20181030A-20221226-S001-R001-R-040046.fts
upper limit SN vs magnitude graph from USNO-B1 catalog
UT upper limit
2022-12-26 19:00:47.929
17.002 +/- 1.367 (3sigma)
16.476 +/- 1.369 (5sigma)
15.763 +/- 1.373 (10sigma)