GCN Circular 10576
Subject
INTEGRAL Alert n. 5995: MASTER-Net optical observations
Date
2010-04-04T15:26:04Z (15 years ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <gcncirc@observ.inetcomm.ru>
D.Kuvshinov, E. Gorbovskoy, V. Lipunov, V.Kornilov, A.Belinski,
N.Shatskiy, N.Tyurina, P.Balanutsa, V.V.Chazov, P.V.Kortunov, A.Kuznetsov, D.Zemnukhov,
M. Kornilov
Sternberg Astronomical Institute, Moscow State University
V.Yurkov, Yu.Sergienko, D.Varda, A.Garusina Blagoveschensk Educational State
University, Blagoveschensk
A. Tlatov, A.V. Parhomenko, D. Dormidontov
Kislovodsk Solar Station of the Pulkovo Observatory
V.Krushinski, I.Zalozhnih, T.Kopytova, A. Popov
Ural State University, Kourovka
K.Ivanov, S.Yazev, N.M.Budnev, E.Konstantinov, V.Lenok
Irkutsk State University
Two MASTER robotic telescopes (MASTER-Net: http://observ.pereplet.ru)
located at Vostryakovo (Moscow) and Tunka-Baykal was responted to the GRB
100403A (Integral alert 5995) 16 sec after Notice time and 35 s after the
GRB time and 36 sec after Notice time and 55 s
after the GRB time.
Baykal weather is bad. Moscow weather is good.
The Moscow result is:
T-T_grb Exp m_lim Band
36 30s 17 Unfiltered
The optical star HDE 245770 (~9m V) not saturated (companion of the X-ray
pulsar A0535+26).
It is interesting that both last INTEGRAL and Swift BAT alerts (GCN
10561, GCN 10573) are the result activity of the X-ray Pulsars with Be
stars ( A0535+26 and LS V +44 17).
By the way the X-ray pulasar A0535+26 is the NS with high magnetic field
~ 10^14 Gs (see very old paper Lipunov 1982, Soviet Astronomy, vol.
26, 537 or monograph: V.M. Lipunov, "Astrophysics of Neutron Stars",
Springer-Verlag, Berlin, New-York, 1992).
The message may be cited.
mailto: lipunov@sai.msu.ru