Rossi X-ray Timing Explorer Observations of the X-ray Pulsar EXO 1722-363 - a Candidate Eclipsing Supergiant System
arXiv:astro-ph/0507259 · doi:10.1086/444610
Abstract
Observations made of the X-ray pulsar EXO 1722-363 using the Proportional Counter Array and All Sky Monitor on board the Rossi X-ray Timing Explorer reveal the orbital period of this system to be 9.741 +/- 0.004 d from periodic changes in the source flux. The detection of eclipses, together with the values of the pulse and orbital periods, suggest that this source consists of a neutron star accreting from the stellar wind of an early spectral type supergiant companion. Pulse timing measurements were also obtained but do not strongly constrain the system parameters. The X-ray spectra can be well fitted with a model consisting of a power law with a high energy cutoff and, for some spectra, a blackbody component with a temperature of approximately 0.85 keV.
arXiv commentAccepted for publication in The Astrophysical Journal. 27 pages including 10 figures
References in corpus (6)
- Observations of Accreting Pulsars
- First Results from the All-Sky Monitor on the Rossi X-ray Timing Explorer
- Origin of the Soft Excess in X-ray Pulsars
- RXTE Measurement of the Diffuse X-ray Emission From the Galactic Ridge: Implications for the Energetics of the Interstellar Medium
- A Hard X-ray survey of the Galactic Center with INTEGRAL/IBIS. Catalog of sources
- Nature of the Soft Spectral Component in the X-ray Pulsars SMC X-1 and LMC X-4
Cited by in corpus (9)
- High-Mass X-ray Binaries in the Milky Way: A closer look with INTEGRAL
- The ephemeris, orbital decay, and masses of 10 eclipsing HMXBs
- A Systematic Search for Periodicities in RXTE/ASM Data
- Unveiling the nature of INTEGRAL objects through optical spectroscopy. VII. Identification of 20 Galactic and extragalactic hard X-ray sources
- An Extended and More Sensitive Search for Periodicities in RXTE/ASM X-ray Light Curves
- Spectral classification of the mass donors in the high-mass X-ray binaries EXO 1722-363 and OAO 1657-415
- The Orbit of the Eclipsing X-ray Pulsar EXO 1722-363
- Periodicity from X-ray sources within the inner Galactic disk
- Concerning the occurrence of bow shocks around high-mass X-ray binaries