FRB20180916B-20221121-S001-R001-R-222255.fts

upper limit SN vs magnitude graph from USNO-B1 catalog

UT upper limit 2022-11-21 13:22:57.210 15.074 +/- 2.573 (3sigma) 14.355 +/- 2.580 (5sigma) 13.380 +/- 2.595 (10sigma)