[vsnet-grb-info 25657] GRB 200519A: iTelescope optical afterglow detection

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  27757
SUBJECT: GRB 200519A: iTelescope optical afterglow detection
DATE:    20/05/19 16:37:18 GMT
FROM:    Albert Kong at NTHU  <akhkong at gmail.com>

A.K.H. Kong (NTHU, Taiwan) reports

We observed the field of GRB 200519A (Sbarufatti et al. GCN 27756)
with the T31 0.5m telescope of iTelescope.Net in Siding Spring,
Australia. The observation was done with a luminance filter (400-700
nm) beginning at 2020-05-19 15:07:45 UT (about 3.8 hours after the
trigger) for 300 sec. The optical afterglow (Sbarufatti et al. GCN
27756) was detected with an estimated magnitude of 19.3+/-0.8 by
calibrating with the USNO UCAC5 catalogue.