FRB20180814A-20230102-S001-R001-R-214950.fts
upper limit SN vs magnitude graph from USNO-B1 catalog
UT upper limit
2023-01-02 12:49:52.259
16.180 +/- 0.741 (3sigma)
15.665 +/- 0.742 (5sigma)
14.966 +/- 0.744 (10sigma)