S. E. Shaw, M. Chernyakova, J. Rodriguez, R. Walter, P. Kretschmar, S. Mereghetti
Published 2004-09-10Version 1
The millisecond pulsar PSR B1259-63 and the Be star SS2883 are situated in a highly eccentric binary system, with orbital period ~3.4 years. We report on hard X-ray observations obtained with the INTEGRAL satellite close to the 2004 periastron passage. These are the first imaging observations of this system in the hard X-ray range (>20 keV) and allow the emission of PSR B1259-63 to be separated from that of a nearby unidentified variable source which may have contaminated previous hard X-ray observations of this system. Using the IBIS/ISGRI instrument we measured a flux of ~2--6 mCrab in the 20--200 keV range, with a power law spectrum of photon index of 1.3 +/- 0.5.
Comments: Accepted for publication in Astronomy and Astrophysics Letters. See paper for author affiliations
Journal: Astron.Astrophys. 426 (2004) L33-L36
INTEGRAL observations of the variability of OAO 1657-415
Spectroscopic Observations of the Delta Scorpii Binary during Its Recent Periastron Passage
Optical, near-infrared and hard X-ray observations of SAXJ1353.9+1820: a red quasar
