GCN Circular 15237
Subject
GRB 130831A: Maidanak optical observations, possible emerging Supernova
Event
Date
2013-09-21T12:04:06Z (12 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
A. Pozanenko (IKI), A. Volnova (IKI), B. Hafizov (UBAI), O. Burhonov
(UBAI) report on behalf of larger GRB follow-up collaboration:
We continue observation of the afterglow (Hagen et al., GCN 15139;
Guidorzi et al., GCN 15140) of the Swift GRB 130831A (Hagen et al., GCN
15139) with AZT-22 telescope equipped with SNUCAM at Maidanak
observatory. A preliminary photometry of combined images obtained on
Sep. 16 is following:
T_start T0+ Filter, Exposure, OT
(UT) (mid, d) (s)
2013-09-16T19:00:13 16.28 R 14x300 22.77 +/- 0.07
The photometry is based on SDSS stars (see GCN 15190).
This is brighter than we obtained on Sep. 9 (23.11 +/- 0.06) and on
Sep. 15 (22.87 +/- 0.08). We suggest the observed re-brightening is an
emerging Supernova associated with GRB 130831A.
A preliminary lc of the afterglow+SN of GRB 130831A can be found in
http://grb.rssi.ru/GRB130831A/grb130831A_lc_preliminary.PNG