FRB20190417A-20221227-S001-R001-R-190027.fts

upper limit SN vs magnitude graph from USNO-B1 catalog

UT upper limit 2022-12-27 10:00:29.609 15.537 +/- 1.201 (3sigma) 14.957 +/- 1.203 (5sigma) 14.171 +/- 1.208 (10sigma)