FRB20190117A-20221225-S001-R001-R-193138.fts
upper limit SN vs magnitude graph from USNO-B1 catalog
UT upper limit
2022-12-25 10:31:40.450
15.697 +/- 2.794 (3sigma)
14.881 +/- 2.804 (5sigma)
13.773 +/- 2.823 (10sigma)