FRB20190117A-20221209-S001-R001-R-193756.fts
upper limit SN vs magnitude graph from USNO-B1 catalog
UT upper limit
2022-12-09 10:37:58.100
15.485 +/- 3.469 (3sigma)
14.693 +/- 3.481 (5sigma)
13.617 +/- 3.505 (10sigma)