GCN Circular 21471
Subject
GRB 170810A: AbAO optical upper limit
Event
Date
2017-08-13T19:29:38Z (8 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
A. Volnova (IKI), A. Pozanenko (IKI), R. Inasaridze (AbAO), V. Ayvazian
(AbAO), O. Kvaratskhelia (AbAO), G. Inasaridze (AbAO), E. Mazaeva (IKI),
I. Molotov (KIAM) report on behalf of larger GRB follow-up collaboration:
We observed the field of the Swift GRB 170810A (Gibson et al., GCN 21450)
with AS-32 (0.7m) telescope of Abastumani Observatory starting on August, 11
(UT) 17:02:09. We obtained several unfiltered images of the field. Within
enhanced XRT error circle (Goad et al., GCN 21451) we do not detect the
afterglow (Rebolo et al, GCN 21449; Gibson et al., GCN 21450). Preliminary
photometry of the field is following
Date UT start t-T0 Filter Exp. OT Err UpLim (3
sigma)
(mid, days) (s)
2017-08-11 17:02:09 0.80915 CR 33*20 n/d n/d 18.2
Photometry is based on nearby SDSS stars (Lupton transformation)
SDSS id R_Lupton
J123141.98+033552.6 15.637 0.013
J123153.09+033552.7 14.800 0.012
J123154.00+033945.4 15.540 0.013