Outburst from EXO 2030+375 detected with INTEGRAL
ATel #367; D. Gotz (IASF, Milano), J. A. Zurita Heras (ISDC, Geneva), C. Winkler (ESTEC), N. Gehrels (NASA/GSFC), S. Martinez-Nunez (Valencia), A. Bazzano (IASF, Roma), Alexander Lutovinov (IKI, Moscow)
on 15 Dec 2004; 12:09 UT
Distributed as an Instant Email Notice Transients
Credential Certification: Nami Mowlavi (Nami.Mowlavi@obs.unige.ch)
Subjects: X-ray, Gamma Ray, Binary, Neutron Star, Pulsar
The HMXB pulsar EXO2030+375 was observed by INTEGRAL in a galactic plane
scan on December 14, 2004 from 10:46:43 to 14:29:08 UTC. The 20-60 keV
flux averaged on single pointings of 2200 sec increased from 93 to 214 mCrab.
EXO 2030+375 was in the JEMX FOV during one pointing and was detected with
average fluxes of 45 and 69 mCrab in the 3-10 kev and 10-31 keV bands.
At 11:46:25 UTC the source did show a 450 s long outburst detected by
the INTEGRAL Burst Alert System. Its pulse peak spectrum was characterized
by a power-law with photon index 3.2+/-0.4 and a flux of 5E-9 erg/cm2/s
in the 20-40 keV band corresponding to about 0.6 Crab. The 42 s characteristic
pulsations are clearly detected.
In the last pointing, the source was still brightening, reaching the
highest level ever observed by INTEGRAL. INTEGRAL will reobserve the
source on December 17.
