FRB20190222A-20221227-S001-R001-R-194118.fts
upper limit SN vs magnitude graph from USNO-B1 catalog
UT upper limit
2022-12-27 10:41:20.989
16.116 +/- 1.434 (3sigma)
15.487 +/- 1.437 (5sigma)
14.632 +/- 1.443 (10sigma)