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GCN Circular 4118

GRB051021.6: MASTER optical observation
2005-10-21T16:14:23Z (19 years ago)
Vladimir Lipunov at Moscow State U/Krylov Obs <>
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 ( responded to
  GRB051021.6  at 2002-10-21 15:39:37 under the bad weather conditions 
after sunset.

An automated response took the first image at 01h 28min  after the GRB 
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  14.0 m.
The reduction is continuing.
The JPG-image will be   available at  .
This work is supported by RFFI  04-02-16411 grant.
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