[vsnet-grb-info 2029] GRB050805a: MASTER optical candidat

[GCN Circulars]

TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3868
SUBJECT: GRB050805a: MASTER optical candidat 
DATE:    05/08/25 02:15:24 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs  <gcncirc at observ.inetcomm.ru>

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

Sternberg Astronomical Institute, Moscow Union "Optic"

       MASTER (http://observ.pereplet.ru) responded to GRB 050824 (Swift 
trigger  151905). The first image  was 764 sec after
SWIFT  GRB050824 detection    under the
     not very good weather condition. 
We see OT J. Gorosabel (GCN 3865) with m = 17.5 (unfiltered close to R, 
exp.  45 sec) on 2-3 sigma level. 
On summ of 9 images from 19.5 up to 28.5 minut after GRB Time (23 12 16.00 
UT) m= 18.0 on 5 sigma.

      UT                 After GRB time          m
     23 25 00               764s               17.9
     23 31 44        19.5min - 28.5 min        18.3
     23 31 44        19.5min - 37.75 min       18.8

The JPG-image of the summ   will be  available at
http://observ.pereplet.ru/images/GRB050824/1.jpg  .

The reduction is continuing.
This work is supported by RFFI  04-02-16411 grant.
This message can be cited.
Mailto: lipunov at sai.msu.ru