FRB20190117A-20221125-S001-R001-R-201730.fts
upper limit SN vs magnitude graph from USNO-B1 catalog
UT upper limit
2022-11-25 11:17:32.270
16.230 +/- 1.366 (3sigma)
15.569 +/- 1.369 (5sigma)
14.671 +/- 1.375 (10sigma)