GCN Circular 21393
Subject
GRB 170728B: BOOTES-2/TELMA optical detection during the extended gamma-ray phase
Date
2017-07-30T17:00:39Z (7 years ago)
From
Alberto Castro-Tirado at Inst.de Astro. de Andalucia <ajct@iaa.es>
A. J. Castro-Tirado (IAA-CSIC Granada & ISA-UMA M��laga), A.
Gonz��lez-Rodr��guez, Y. Hu, R. Cunniffe, J. C. Tello, B.-B. Zhang
(IAA-CSIC Granada), A. Castell��n, I. Carrasco (UMA M��laga), M. Jel��nek
(ASU-CAS Ondrejov), S. Guziy (Nikolaev Univ.), S. B. Pandey (ARIES
Nainital), S. Jeong (SKKU Seoul), M. D. Caballero-Garc��a (ASU-CAS
Prague), M. Wildi (Vermes Obs.) and P. Kub��nek (IP-ASCR Prague), on
behalf of a larger collaboration, report:
Following the detection of GRB 170728B by Swift (Cenko et al. GCNC
21371), the TELMA 0.6m robotic telescope at the BOOTES-2 astronomical
station at IHSM/UMA-CSIC in M��laga (Spain) pointed to the GRB location
26 sec after the notice time and 40 sec after trigger time, i.e. at
23:03:59 UT on July 28.
The first exposures (3 sec, unfiltered) were taken simultaneously to the
extended gamma-ray emission phase (Stanbro et al. GCNC 21383, Ukwatta et
al. GCNC 21384), confirming the optical transient within the Swift/XRT
error box (D'Elia et al., GCNC 21376) being coincident with the optical
afterglow position (D'Avanzo et al. GCN 21373) with magnitudes in the
range reported by Lipunov et al. (GCNC et al. 21391) starting 2 sec
after. A detailed analysis is ongoing.
This message can be quoted.
[GCN OPS NOTE(31jul17): Per author's request, the date was corrected
from "July 2" to "July 28"]