[vsnet-grb-info 15377] GRB 140801A: AAO optical observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  16667
SUBJECT: GRB 140801A: AAO optical observations
DATE:    14/08/04 01:38:25 GMT
FROM:    Alexei Pozanenko at IKI, Moscow  <apozanen at iki.rssi.ru>

A. Volnova (IKI), R. Inasaridze (AAO), Molotov (KIAM), A. Pozanenko (IKI) 
report on behalf of larger GRB follow-up collaboration:

We observed the field of GRB 140801A (Pelassa, GCN 16658)  with AS-32 (0.7m) 
telescope of Abastumani Observatory starting on Aug. 02 (UT) 21:54:52. We 
obtained several unfiltered frames under  of 60 s under average FWHM of 2.0 
arcsec. The optical afterglow (Gorbovskoy et al., GCN 16653; Xu et al., GCN 
16656, Masi, GCN 16659)  is well detected on the stacked image.

Details of a photometry of the  GRB 140801A are following:

date       UT start        t-T0           Filter    Exp.    OT        err
                                (mid, days)            (s)

2014-08-02 21:54:52  1.14962      None    26*60   22.13    0.18

The photometry is based on the USNO-B1 star ((J2000) 02:56:16.58 +30:57:02.1 
assuming R = 16.06) suggested by Moskvitin et al.,  (GCN 16663). Our 
photometry does not contradict un-broken decay of a light curve of GRB 
140801A (Kann et al., GCN 16666).