B2_1520p31-20210419-S001-R001-B-014346.fts

Only less than 50 stars was detected

B2_1520p31-20210419-S001-R001-I-014732.fts

upper limit SN vs magnitude graph from USNO-B1 catalog

UT upper limit 2021-04-19 16:47:32 15.976 +/- 2.821 (3sigma) 15.367 +/- 2.827 (5sigma) 14.541 +/- 2.837 (10sigma)

B2_1520p31-20210419-S001-R001-R-014616.fts

upper limit SN vs magnitude graph from USNO-B1 catalog

UT upper limit 2021-04-19 16:46:17 16.823 +/- 2.481 (3sigma) 16.069 +/- 2.488 (5sigma) 15.045 +/- 2.501 (10sigma)

B2_1520p31-20210419-S001-R001-V-014502.fts