[vsnet-grb-info 16237] GRB 150301B: MASTER early OT detection
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Mon Mar 2 05:51:48 JST 2015
TITLE: GCN CIRCULAR
NUMBER: 17518
SUBJECT: GRB 150301B: MASTER early OT detection
DATE: 15/03/01 20:51:41 GMT
FROM: Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov at xray.sai.msu.ru>
D.Buckley, S. Potter, A.Kniazev, M.Kotze
South African Astronomical Observatory
E. Gorbovskoy, V. Lipunov, V.Kornilov,
N.Tyurina, P.Balanutsa, A.Kuznetsov, V.V.Chazov, D.Kuvshinov,
Lomonosov Moscow State University,
Sternberg Astronomical Institute, Moscow State University
V.Yurkov, Yu.Sergienko, D.Varda, E.Sinyakov
Blagoveschensk Educational State University, Blagoveschensk
A. Tlatov, A.V. Parhomenko, D. Dormidontov, V.Sennik
Kislovodsk Solar Station of the Pulkovo Observatory
V.Krushinsky, I.Zalozhnih, A. Popov
Ural Federal University, Yekaterinburg, 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 SAAO was pointed to the GRB150301.82 (Lien et al, GCN 17515)
60 sec after notice time
and 79 sec after trigger time at 2015-03-01 19:39:23 UT in two
polarizations. On our first (10s
exposure) set we found 1 optical transient within SWIFT error-box (ra=05
56 37 dec=-57 58 35 r=0.050000).
T_start RA DEC Exp unfiltered
s magnitude
2015-03-01 19:39:23 79.0 05h 56m 39.94s -57d 58m 10.0s 15.3
The error is about 0.5 arcsec. This position is coincidet with UVOT data.
We detected OT before maximum brightness.
The 5-sigma upper limit has been about 16.8 mag . The telegram is
generated automatically.
We have number of the images after maximum in two polarizations. The
reduction is continuated.
The message may be cited.
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