FRB20190117A-20221227-S001-R001-R-190354.fts
upper limit SN vs magnitude graph from USNO-B1 catalog
UT upper limit
2022-12-27 10:03:56.850
16.283 +/- 1.513 (3sigma)
15.610 +/- 1.517 (5sigma)
14.696 +/- 1.523 (10sigma)