TITLE:   GCN CIRCULAR
NUMBER:  18064
SUBJECT: Swift Trigger 650221 / IGR J00291+5934: MASTER-IAC OT observations
DATE:    15/07/25 13:09:58 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov@xray.sai.msu.ru>

R. Rebolo, M. Serra, N. Lodieu, G. Israelian, L. Suarez-Andres
The Instituto de Astrofisica de Canarias


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

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

D.Buckley, S. Potter, A.Kniazev, M.Kotze
South African Astronomical Observatory


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

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

V.Krushinski, I.Zalozhnih
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-IAC  robotic telescope (MASTER-Net: http://observ.pereplet.ru) 
located in IAC Teide Observatory  (Tenerife) was pointed to the 
Swift Trigger 650221/IGR J00291+5934 (Barthelmy et al., GCN 18061)  30 sec 
after notice time and 88 sec after trigger time at 2015-07-25 02:13:33 UT.
On our first (20s 
exposure) coadd set we  clearly see IGR J00291+5934 Optical Counterpart 
with 17.40+-0.10 unfiltered MASTER instrumental magnitude. The limit is 
18.1. We have 131 images in two tube  up to 2015-07-25 05:43:08 UT.
The message may be cited.