GCN Circular 25862
Subject
GRB 190926A: AbAO upper optical limit
Date
2019-09-29T10:55:59Z (5 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
S. Belkin (IKI), A. Pozanenko (IKI), R. Ya. Inasaridze (AbAO,
Samtskhe-Javakheti State University), E. Mazaeva (IKI), A. Volnova
(IKI), V. R. Ayvazian (AbAO, Samtskhe-Javakheti State University),
G.V. Kapanadze (AbAO, Samtskhe-Javakheti State University), I. Molotov
(KIAM) report on behalf of larger IKI GRB follow-up collaboration:
We observed GRB 190926A (Melandri et al., GCN 25848) with AS-32 (0.7m)
telescope of Abastumani Observatory starting on Sep. 27 (UT) 01:16:46.
We obtained several 60 s exposures in R-filter. We do not detect any
source within enhanced Swift-XRT position (Goad et al., GCN 25850) in
the stacked image. Photometry of the field is following
Date UT start t-T0 Filter Exp. OT Err. UL
(mid, days) (s)
2019-09-27 01:16:46 0.6493 R 21*60 n/d n/d 20.8
Photometry is based on nearby USNO-B1.0 star (R2 magnitude):
USNO-B1.0_id R2
1496-0169403 18.52
The non detection in an agreement with previously reported results
(Lipunov et al., GCN #25849, Zheng & Filippenko, GCN # 25852, Oates &
Melandri, GCN #25853, Adachi et al., GCN #25854; Kann et al., GCN #25856).