FRB20190117A-20221116-S001-R001-R-225256.fts
upper limit SN vs magnitude graph from USNO-B1 catalog
UT upper limit
2022-11-16 13:52:58.929
16.398 +/- 2.952 (3sigma)
15.577 +/- 2.962 (5sigma)
14.464 +/- 2.982 (10sigma)