1 research outputs found
Hard Spectra of X-Ray Pulsars from INTEGRAL Data
We present spectra for 34 accretion-powered X-ray and one millisecond pulsars
that were within the field of view of the INTEGRAL observatory over two years
(December 2002 - January 2005) of its in-orbit operation and that were detected
by its instruments at a statistically significant level (> 8 sigma in the
energy range 18--60 keV). There are seven recently discovered objects of this
class among the pulsars studied: 2RXP J130159.6-635806, IGR/AX J16320-4751, IGR
J16358-4726, AX J163904-4642, IGR J16465-4507, SAX/IGR J18027-2017 and AX
J1841.0-0535. We have also obtained hard X-ray (> 20 keV) spectra for the
accretion-powered pulsars A 0114+650, RX J0146.9+6121, AX J1820.5-1434, AX
J1841.0-0535 and the millisecond pulsar XTE J1807-294 for the first time. We
analyze the evolution of spectral parameters as a function of the intensity of
the sources and compare these with the results of previous studies.Comment: 33 pages, 2 figures Astronomy Letters, 31, pp. 729 (2005