[vsnet-grb-info 12134] GRB 120716A: optical observation in Maidanak observatory

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  13523
SUBJECT: GRB 120716A: optical observation in Maidanak observatory
DATE:    12/07/28 14:43:32 GMT
FROM:    Alexei Pozanenko at IKI, Moscow  <apozanen at iki.rssi.ru>

A. Pozanenko (IKI), A. Sergeev (Institute of Radio Astronomy NASU), A. 
Volnova (SAI MSU), O. Burhonov (UBAI), I. Molotov (KIAM) report on behalf of 
larger GRB follow-up collaboration:

We observed the region of the optical afterglow (Cenko et al., GCN 13489) 
of IPN localized GRB 120716A (Hurley et al., GCN 13487) with AZT-22 
telescope  of Maidanak observatory on Jul. 19 (UT) 17:57:06  and Jul. 21 
(UT) 18:46:16 under mean seeing  of about 0.6 arcsec.  Totally we obtained 8 
images of 600 s exposure in R  filter. In each particular image we clearly 
see the optical afterglow (Cenko et al., GCN 13489; Xu  et al., GCN 13490; 
Schady  et al., GCN 13492) in coordinates (J2000) 20:52:12.15 +09:35:54.2 
(uncertainty of 0.13 arcsec in both coordinates).

Preliminary photometry of the afterglow is based on USNO-B1.0 nearby stars:

T0+        Filter,     Exposure,   OT
(mid, d)                (s)

date            t_start (UT)    filter   exp,s    OT

2012-07-19  17:57:06      R      4*600  20.71+/-0.04
2012-07-21  18:46:16      R      4*600  21.01+/-0.04