[vsnet-grb-info 13823] GRB 130822A: optical upper limits
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Fri Aug 30 22:20:11 JST 2013
TITLE: GCN CIRCULAR
NUMBER: 15137
SUBJECT: GRB 130822A: optical upper limits
DATE: 13/08/30 13:20:03 GMT
FROM: Alexei Pozanenko at IKI, Moscow <apozanen at iki.rssi.ru>
A. Volnova (IKI), R.Inasaridze (AAO), O. Kvaratskhelia (AAO), V.
Ayvazian(AAO), Yu. Krugly (IA KhNU), I. Slyusarev (IA KhNU), I. Molotov
(KIAM), V. Linkov (ISON), A. Pozanenko (IKI) report on behalf
of larger GRB follow-up collaboration:
We observed the field of Swift GRB 130822A (Kocevski et al., GCN 15112)
on Aug., 22 with AS-32 (0.7m) telescope of Abastumani Observatory,
SANTEL-400AN (0.4m) telescope of ISON-Kislovodsk observatory, and AZT-8
(0.7m) telescope of Institute of Astronomy, Kharkiv National University.
We obtained several unfiltered frames with exposures of 120 s (AS-32),
100 s and 60 s (SANTEL-400AN), and several frames with filter R with
exposure of 120 s (AZT-8). Within the enhanced XRT circle (Beardmore et
al., GCN 15117) we did not detect any source on stacked images.
The details of the photometry are the following:
Telescope t_start, UT filter exptime,s t-t0, mid, days uplim
AZT-8 21:39:21 R 55*120 0.28000 20.6
S-400 22:31:37 None 23*100 0.30332 19.3
AS-32 23:46:59 None 40*120 0.36513 21.9
The photometry is based on SDSS stars, R mag (R mag obtained via
transformations ugriz in BVRI (Lupton, 2005):
SDSS id R R_err
J015202.75-031421.9 12.80 0.012
J015134.64-031348.8 13.95 0.013
J015148.69-030854.9 14.62 0.013
More information about the vsnet-grb-info
mailing list