[vsnet-grb-info 3785] GRB 060926: MASTER OT alert observation

[GCN Circulars]

TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  5619
SUBJECT: GRB 060926: MASTER  OT alert observation 
DATE:    06/09/26 21:14:12 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, G.Borisov, A.Sankovich, V.Vladimirov, P.Gritsyk

Sternberg Astronomical Institute, Moscow Union 'Optic'
MASTER  robotic system (http://observ.pereplet.ru)
responded to GRB060926 (Holland  et al., GCN Circ 5612).
The first image was started at 2006-09-26 16:49:57 UT, 76 s  after the GRB
time. The unfiltered image is calibrated relative to USNO A2.0 (0.8 R + 0.2 B).
We see OT (Holland  et al., GCN Circ 5612).
Our results:

   T-T_grb             exp_time           m (close to R)    S/N

  76 s - 106 s          30 s                   >17           5
  76 s - 360 s         5x30 s                  18+-0.3
  76 s - 820 s        10x30 s                  18.5+-0.3

Reduction is continued.
Images are available:
http://pereplet.sai.msu.ru/nauka/i12.jpg
http://pereplet.sai.msu.ru/nauka/i12a.jpg
http://pereplet.sai.msu.ru/nauka/i12b.jpg
Small part with OT
http://observ.pereplet.ru/images/GRB060926/GRB060926_5.jpg
http://observ.pereplet.ru/images/GRB060926/GRB060926_10.jpg
This work is supported by RFFI  04-02-16411 grant.
This message can be cited.
Mailto: lipunov at sai.msu.ru