[vsnet-grb-info 12307] GRB 120819A: MASTER final limits

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  13691
SUBJECT: GRB 120819A: MASTER final limits 
DATE:    12/08/20 13:27:06 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs  <gcncirc at observ.inetcomm.ru>

E. Gorbovskoy, D.Denisenko, V. Lipunov, V.Kornilov, D.Kuvshinov, 
A.Belinski,N.Tyurina, N.Shatskiy, P.Balanutsa, D.Zimnukhov,
A.Kuznetsov, V.V.Chazov
Sternberg Astronomical Institute, Moscow State University

V.Yurkov, Yu.Sergienko, D.Varda, E.Sinyakov
Blagoveschensk Educational State University, Blagoveschensk


K.Ivanov, S.Yazev, N.M.Budnev, O.Gres, O.Chuvalaev, V.A.Poleshchuk
Irkutsk State University

A. Tlatov, A.V. Parhomenko, D. Dormidontov, V.Sennik
Kislovodsk Solar Station of the Pulkovo Observatory

V.Krushinski, I.Zalozhnih,  A. Popov
Ural Federal University, Kourovka

Hugo Levato and Carlos Saffe
Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE)

Claudio Mallamaci, Carlos Lopez and Federico Podest
Observatorio Astronomico Felix Aguilar (OAFA)


MASTER II  robotic telescope (MASTER-Net: http://observ.pereplet.ru) located in 
Blagoveschensk was pointed to the  GRB120819A (Beardmore et al., GCN 
13681) 25 sec after notice time and 115 sec after GRB time at 2012-08-19 
13:12:10.052 UT (Yurkov et. al, GCN 13682).

Unfiltered observations were carried out on high zenith distance (78 deg. 
at the observations beginning moment and above).
The unfiltered magnitude is calibrated relative to USNO B1.0 (0.8 R + 0.2 
B).
After the data processing  we have the following results:


             Start      Middle    Stop    T-Tgrb Coadd Exp.time  Limit
2012-08-19 13:12:10  13:12:20  13:12:30    125     1       20   16.5
2012-08-19 13:12:10  13:15:00  13:17:51    285     6      140   17.8
2012-08-19 13:19:08  13:39:35  14:00:02   1785    10     1800   18.5

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