FRB20190222A-20221226-S001-R001-R-195535.fts

upper limit SN vs magnitude graph from USNO-B1 catalog

UT upper limit 2022-12-26 10:55:38.020 15.557 +/- 2.029 (3sigma) 14.896 +/- 2.034 (5sigma) 13.998 +/- 2.044 (10sigma)