FRB20190117A-20221226-S001-R001-R-191018.fts
upper limit SN vs magnitude graph from USNO-B1 catalog
UT upper limit
2022-12-26 10:10:20.460
15.782 +/- 2.169 (3sigma)
15.090 +/- 2.175 (5sigma)
14.150 +/- 2.186 (10sigma)