[vsnet-grb-info 7925] GRB 090528B: MASTER-II Kourovka optical limit

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  9468
SUBJECT: GRB 090528B: MASTER-II Kourovka  optical limit 
DATE:    09/06/01 08:30:40 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs  <gcncirc at observ.inetcomm.ru>

V.Krushinski, I.Zalognikh, A.Popov, T.Kopytova
Ural State University, Kourovka

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

K.Ivanov, S.Yazev
Irkutsk State University

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




MASTER II robotic telescope (MASTER-Net: http://observ.pereplet.ru, 
2x500mm,2 x 4 square degrees, 2 x 16Mpx Apogee CCD) located
at Kourovka Observatory has  observed  FERMI error box

GRB_RA:          313.740d {+20h 54m 58s} (J2000)
GRB_DEC:         +32.350d {+32d 21' 00"} (J2000)

1.18 degres error box radius (Trigg Number 265206153)

starting after sunset (19:18:23.275, ~7 hours after GRB time) with 180s 
exposure in R and V filters simultaniuosly at ~60 degrees zenit distance.


Robot do not detect OT with limit:
  R>19.0 V>18.1

Our images cover 30% last 1 sigma error box (A. von Kienlin, GCN Circ 
9447)


The R-image is available at


http://observ.pereplet.ru/images/GRB090528B/grb090528B.jpeg

The black circle is A. von Kienlin, GCN Circ 9447 error box.
The message may be cited.

mailto: lipunov at sai.msu.ru