FRB20190117A-20221210-S001-R001-R-195003.fts
upper limit SN vs magnitude graph from USNO-B1 catalog
UT upper limit
2022-12-10 10:50:05.549
15.736 +/- 2.292 (3sigma)
15.017 +/- 2.299 (5sigma)
14.040 +/- 2.311 (10sigma)