TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  4119
SUBJECT: GRB051021.63 
DATE:    05/10/21 16:39:09 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs  <gcncirc@observ.inetcomm.ru>

V. Lipunov, V.Kornilov, D.Kuvshinov, N.Tyurina, A.Belinski, E.Gorbovskoy,
A.Krylov, G.Borisov, A.Sankovich, V.Vladimirov

Sternberg Astronomical Institute, Moscow Union 'Optic'
MASTER  robotic system (http://observ.pereplet.ru) responded to 
GRB051021.63 (Swift triger 53550) at 2005-10-21 15:03:09.46
An automated response took the first image at 2005-10-21 16:14:29 UT, 01:11:19.54  after the GRB time
The unfiltered image is calibrateds relative to USNO A2.0 (0.8 R + 0.2 B).
The robot not find OT-candidate in error box.
Our upper limit is about  16.3 m.
The previouse circular number 4118 was about HETE Alert 3947.
The reduction is continuing.

The JPG-image will be   available at
http://observ.pereplet.ru/images/GRB051021.63/1.jpg  .
This work is supported by RFFI  04-02-16411 grant.
This message can be cited.
Mailto: lipunov@sai.msu.ru