FRB20190117A-20221215-S001-R001-R-205549.fts
upper limit SN vs magnitude graph from USNO-B1 catalog
UT upper limit
2022-12-15 11:55:51.990
15.887 +/- 3.841 (3sigma)
15.105 +/- 3.854 (5sigma)
14.044 +/- 3.879 (10sigma)