SGR 1806-20
ATel #325; S. Molkov (IKI, Moscow), K. Hurley (USB), A. Lutovinov (IKI, Moscow), R. Sunyaev (IKI, Moscow and MPA, Garching)
on 30 Aug 2004; 18:28 UT
Distributed as an Instant Email Notice Request For Observations
Credential Certification: A.Lutovinov (aal@hea.iki.rssi.ru)
Subjects: X-ray, Gamma Ray, Soft Gamma-ray Repeater
The Soft Gamma-Ray Repeater SGR 1806-20 was observed
with INTEGRAL during the campaign of the Galactic Center
monitoring on 21-24 Aug, 2004. These observations
were preceded by the INTEGRAL Galactic Plan Scan
in which the source exhibited bursting activity (ATEL#324).
The source was in the field of view of the IBIS telescope
FOR ~120 ks and more than sixty bursts were detected
IN the ISGRI/IBIS low energy detection plane
(18-70 keV). A few of them were unusually
long (>1s) and some were extremely powerful (mean flux
up to 4 10^{-6} erg/s/cm2 in the 18-70 keV energy band).
In addition, the mean persistent flux of SGR 1806-20
was AT A level of ~5 mCrab in the energy range
18-60 keV, which is approximately a factor of 2 higher
than it was during autumn 2003 INTEGRAL observations.
The next observations of the region of SGR 1806-20
with INTEGRAL are scheduled for the period
18:30 Sept. 1, 2004 to 02:10 Sept. 2, 2004 (UT).
Simultaneous observations, especially
in soft X-rays, are encouraged.
