B2_1520p31-20190314-S001-R001-B-042854.fts

Only less than 50 stars was detected

B2_1520p31-20190314-S001-R001-I-043239.fts

upper limit SN vs magnitude graph from USNO-B1 catalog

UT upper limit 2019-03-14 19:32:40 16.279 +/- 2.092 (3sigma) 15.555 +/- 2.097 (5sigma) 14.573 +/- 2.108 (10sigma)

B2_1520p31-20190314-S001-R001-R-043125.fts

upper limit SN vs magnitude graph from USNO-B1 catalog

UT upper limit 2019-03-14 19:31:26 16.442 +/- 2.774 (3sigma) 15.772 +/- 2.780 (5sigma) 14.862 +/- 2.792 (10sigma)

B2_1520p31-20190314-S001-R001-V-043011.fts