GCN Circular 23302
Subject
GRB 180930A: TSHAO optical upper limit
Date
2018-10-03T17:10:51Z (7 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
E. Mazaeva (IKI), A. Kusakin (FAPHI), A. Pozanenko (IKI), I. Reva
(FAPHI), A. Volnova (IKI), M. Krugov (FAPHI) report on behalf of larger
GRB follow-up collaboration:
We observed the field of GRB 180930A (Tohuvavohu et al., GCN 23279)
with Zeiss-1000 1-m telescope of Tien Shan Astronomical Observatory
starting on September 30 (UT) 21:55:14, obtaining a total of 31*120 s
exposure in the Rc-band. Within enhanced XRT position (Osborne et al.,
GCN 23282) we do not detect any object. Preliminary photometry of the
field is following.
Date UT start t-T0 Filter Exp. OT Err. UL
(mid, days) (s)
2018-09-30 21:55:14 0.41030 R 31*120 n/d n/d 20.1
The photometry is based on several nearby USNO-B1.0 stars.