FRB20190117A-20221219-S001-R001-R-191821.fts

upper limit SN vs magnitude graph from USNO-B1 catalog

UT upper limit 2022-12-19 10:18:23.289 16.255 +/- 1.995 (3sigma) 15.554 +/- 2.000 (5sigma) 14.603 +/- 2.010 (10sigma)