GCN Circular 16571
Subject
GRB 140709B: update of Khureltogot optical upper limit
Date
2014-07-10T16:35:49Z (10 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
A. Volnova (IKI), S. Schmalz (AIP), N. Tungalag (Research Center of
Astronomy and Geophysics MAS), I.Molotov (KIAM), A. Pozanenko (IKI)
report on behalf of larger GRB follow-up collaboration:
After receiving a full data set we report details of the observation of
the field of GRB 140709B (Swenson et al., GCN 16551) with ORI-40
telescope of Khureltogot observatory. We started observation on July 09
(UT) 15:31:51 and obtained 60 unfiltered images of 60 s exposure.
Within enhanced XRT error circle (Goad et al., GCN 16556) we do not
detect any new object neither in separate, nor in stacked images.
Details of a photometry is following
UT start t-T0,d Exp,s Filter Up_lim (3 sigma)
15:31:51 0.01334 5*60 None 18.9
15:31:51 0.01940 20*60 None 19.5
The photometry is based on SDSS star J094401.61+633253.8 assuming
R=16.010+/-0.013 (using gri -> R Lupton transformations).