[vsnet-grb-info 5457] GRB 071122: MASTER optical observation

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  7129
SUBJECT: GRB 071122: MASTER optical observation 
DATE:    07/11/22 18:55:13 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs  <gcncirc at observ.inetcomm.ru>

V. Lipunov, V.Kornilov, D.Kuvshinov, N.Tyurina, A.Belinski, E.Gorbovskoy,
A.Krylov, N.Shatskiy, A.Sankovich, G.Borisov, V.Vladimirov,
  P.Gritsyk, V.Vibornov, A.Kuznetsov
Sternberg Astronomical Institute, Moscow Union 'Optic'

A. Tlatov, I.Golubov
Kislovodsk Solar Station of the Pulkovo observatory

Krushinski V., I.Zalozhnih
Ural State University


MASTER  robotic system (http://observ.pereplet.ru) responded to 
GRB 071122.1 (GRB_TIME is 2007-11-22 01:23:25.62, M. Stamatikos et al., 
GCN Circ N 7121).
The first image was at 2007-11-22 01:25:57 UT, 69 s after the GCN notice 
time and  151 s  after the GRB time.
These observations were affected by proximity to the full moon.
The unfiltered image is calibrated relative to USNO A2.0 (0.8 R + 0.2 B).
The robot not find OT-candidate in error box brighter then  15.6 (s/n=10).

Individual images have limiting magnitudes about 16.
We set  the following specific limits for S. B. Cenko (GCN Circ 7125) 
OT position.

start UT    t_start-t_GRB   mean t_GRB    t_exp(s)      mlim   Coadd?
--------------------------------------------------------------------
01:25:57.6            151 s         166 s      30      16.0      N
01:25:57.6            151 s         266 s    5x30      16.8      Y
01:30:06.6       6 min 42 s   14 min 53 s   20x30      17.7      Y
01:34:15.9      11 min 00 s   15 min 02 s   10x30      17.2      Y
01:42:40.3      19 min 15 s   23 min 15 s   10x30      17.2      Y
01:50:59.5      27 min 35 s   31 min 38 s   10x30      17.2      Y

The reduction is continuing.

The delay of the given telegram is connected with participation and
successful end of national Russia football teem on a selection cycle
EURO' 08. Our collective is especially grateful to national Croatia-teem
for the help during the difficult moment!

The reduction is continuing.

This message can be cited.
Mailto: lipunov at sai.msu.ru