FRB20180814A-20221218-S001-R001-R-004320.fts
upper limit SN vs magnitude graph from USNO-B1 catalog
UT upper limit
2022-12-18 15:43:22.289
16.612 +/- 0.714 (3sigma)
16.076 +/- 0.715 (5sigma)
15.349 +/- 0.717 (10sigma)