[vsnet-grb-info 14416] GRB 140102A: AAO optical upper limits
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Tue Jan 14 23:33:44 JST 2014
TITLE: GCN CIRCULAR
NUMBER: 15730
SUBJECT: GRB 140102A: AAO optical upper limits
DATE: 14/01/14 14:33:36 GMT
FROM: Alina Volnova at SAI MSU <alinusss at gmail.com>
GRB 140102A: AAO optical upper limits
A. Volnova (IKI), R. Inasaridze (AAO), G. Inasaridze (AAO), V.
Zhuzhunadze (AAO), Yu. Krugly (IA KhNU), I. Molotov (KIAM), A. Pozanenko
(IKI) report on behalf of larger GRB follow-up collaboration:
We observed the field of GRB 140102A (Hagen et al., GCN 15653) with
AS-32 (0.7m) telescope of Abastumani Observatory on Jan. 5 and 6. We
obtained several unfiltered images of 120 s exposure during each
observational set. On stacked images in the enhanced XRT circle (Goad
et al., GCN 15657) we do not detect the optical afterglow.
The details of the photometry are the following:
Date T_start t-t0, exp., Uplim
(UT) mid, d s 3 sigma
2014-01-05 00:48:24 2.13972 38x120 22.5
2014-01-06 01:04:20 3.18687 32x120 22.3
The photometry is based on the SDSS reference stars from Xu (GCN 15655)
using gri -> R transformations by Lupton 2005:
N SDSS_id R(Lupton)
1 J140740.98+011949.8 17.59
2 J140742.47+012010.4 17.51
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