GCN Circular 22870
Subject
GRB 180626A: TSHAO optical upper limit
Date
2018-06-29T16:09:33Z (6 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
E. Mazaeva (IKI), A. Pozanenko (IKI), A. Kusakin (FAPHI), I. Reva
(FAPHI), A. Volnova (IKI), M. Krugov (FAPHI) report on behalf of larger
GRB follow-up collaboration:
We observed the field of GRB 180626A (Evans et al., GCN 22850; Gotz et
al., GCN 22851) with Zeiss-1000 1-m telescope of Tien Shan
Astronomical Observatory starting on June 26 (UT) 16:26:21. We obtained
several images in R-filter. The optical afterglow (Evans et al., GCN
22850; Martone et al. GCN 22854; Troja et al. GCN 22855; Watson et al.
GCN 22859) is not detected in a stacked image. Preliminary photometry
of the field is following.
Date UT start t-T0 Filter Exp. OT Err. UL
(mid, days) (s)
2018-06-26 16:26:21 0.41918 R 99*120 n/d n/d 21.5
The photometry is based on several nearby SDSS-DR10 stars.
Ref.stars
SDSS-DR9_id R(Lupton)
J161422.32+144433.2 15.113
J161357.84+144752.0 13.989
J161440.94+144745.0 13.136