B2_1520p31-20190616-S001-R001-B-013404.fts

Only less than 50 stars was detected

B2_1520p31-20190616-S001-R001-I-013750.fts

upper limit SN vs magnitude graph from USNO-B1 catalog

UT upper limit 2019-06-16 16:37:52

B2_1520p31-20190616-S001-R001-R-013636.fts

upper limit SN vs magnitude graph from USNO-B1 catalog

UT upper limit 2019-06-16 16:36:37

B2_1520p31-20190616-S001-R001-V-013522.fts

Only less than 50 stars was detected