GCN Circular 4988
Subject
GRB(?)060421:MASTER optical limit
Date
2006-04-21T11:50:19Z (20 years ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <gcncirc@observ.inetcomm.ru>
V. Lipunov, V.Kornilov, N.Tyurina, A.Belinski, D.Kuvshinov, E.Gorbovskoy,
A.Krylov, G.Borisov, A.Sankovich, V.Vladimirov, P.Gritsyk, S.Korobkin
Sternberg Astronomical Institute, Moscow Union 'Optic'
MASTER robotic system (http://observ.pereplet.ru) responded
to GRB060421 (GRB_TIME is 2006-04-21 00:39:23.33, M. R. Goad et al.
GCN4985).
Unfortunaly 2 minutes before notice time roof closed roboticaly due to
meteo alert "cloudy". The first image was at 2006-04-21 00:48:45 UT,
562 s after the GRB time.
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 16.8 (s/n=3)
at Swift XRT position (Mike Goad, Kim Page GCN4987).
This work is supported by RFFI 04-02-16411 grant.
This message can be cited.
Mailto: lipunov@sai.msu.ru