FRB20181128A-20221218-S001-R001-R-004630.fts
upper limit SN vs magnitude graph from USNO-B1 catalog
UT upper limit
2022-12-18 15:46:32.429
16.958 +/- 0.751 (3sigma)
16.334 +/- 0.752 (5sigma)
15.486 +/- 0.755 (10sigma)