[vsnet-grb-info 13602] GRB 130625A: MASTER afterglow limit

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  14929
SUBJECT: GRB 130625A: MASTER afterglow limit
DATE:    13/06/26 06:31:35 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs  <gcncirc at observ.inetcomm.ru>

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

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


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


A. Tlatov, A.V. Parhomenko, D. Dormidontov, V.Senik
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  GRB130625A 23177 sec s after 
notice time and 23214 sec after GRB time at 2013-06-25 13:27:34.231 UT. On 
our first (180s exposure) set we haven`t found optical transient  within 
Swift error-box (D. Grupe et al. GCN 14923).
The 5-sigma upper limit has been about 17.5 mag

On coadd images  images we received the following limits


  T_start  T_finish  T_mid      t_mid-t_grb  Exptime   Filter   Limit  Coadd
---------------------------------------------------------------------------
13:27:34  14:17:44  13:52:39   24719 s      2700 s       R      19.0     15
13:31:38  14:17:44  13:54:41   24841 s      2520 s       W      19.5     14

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