FRB20190117A-20221231-S001-R001-R-185527.fts

upper limit SN vs magnitude graph from USNO-B1 catalog

UT upper limit 2022-12-31 09:55:29.530 15.799 +/- 2.019 (3sigma) 15.137 +/- 2.024 (5sigma) 14.239 +/- 2.033 (10sigma)