GCN Circular 18193
Subject
GRB 150819A: Mondy and TSHAO optical upper limits
Date
2015-08-21T23:11:50Z (10 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
E. Mazaeva (IKI), E. Klunko (ISTP), I. Reva (Fesenkov Astrophysical
Institute), A. Kusakin (Fesenkov Astrophysical Institute), A. Volnova
(IKI), I. Korobtsev (ISTP), A. Pozanenko (IKI) report on behalf of
larger GRB follow-up collaboration:
We observed the field of the Swift GRB 150819A (Ukwatta et al., GCN
18163) with AZT-33IK telescope of Sayan observatory (Mondy) and
Zeiss-1000 (West) 1-m telescope of Tien Shan Astronomical Observatory.
We obtained several images in R-filter in each telescope. We do not
detect any source within enhanced XRT error circle (Evans et al., GCN
18167).
Upper limits of the field are following
Date UT start t-T0 Filter Exp. UL(3 sigma) Telescope
(mid, days) (s)
2015-08-19 19:06:09 0.78197 R 30*120 22.7 AZT-33IK
2015-08-19 21:57:51 0.89889 R 10*300 19.4 Zeiss-1000
Photometry is based on USNO-B1.0 stars:
USNO-B.1_id R2
0997-0042082 17.56
0997-0042080 18.70