INTEGRAL observations of the Small Magellanic Cloud
arXiv:0709.0633 · doi:10.1111/j.1365-2966.2007.12423.x
Abstract
The first INTEGRAL observations of the Small Magellanic Cloud (carried out in 2003) are reported in which two sources are clearly detected. The first source, SMC X-1, shows a hard X-ray eclipse and measurements of its pulse period indicate a continuation of the long-term spin-up now covering ~30 years. The second source is likely to be a high mass X-ray binary, and shows a potential periodicity of 6.8s in the IBIS lightcurve. An exact X-ray or optical counterpart cannot be designated, but a number of proposed counterparts are discussed. One of these possible counterparts shows a strong coherent optical modulation at ~2.7d, which, together with the measured hard X-ray pulse period, would lead to this INTEGRAL source being classified as the fourth known high mass Roche lobe overflow system.
Accepted for publication in MNRAS
References in corpus (12)
- A UBVR CCD Survey of the Magellanic Clouds
- The 3rd IBIS/ISGRI soft gamma-ray survey catalog
- The INTEGRAL/IBIS Scientific Data Analysis
- Optical properties of SMC X-ray binaries
- On Be Star Candidates and Possible Blue Pre-Main Sequence Objects in the Small Magellanic Cloud
- Quasi-Periodic Occultation by a Precessing Accretion Disk and Other Variabilities of SMC X-1
- Old Stellar Populations of the Small Magellanic Cloud
- X-ray observations of Be/X-ray binaries in the SMC
- Long-term Properties of Accretion Disks in X-ray Binaries: I. the variable third period in SMC X-1
- RXTE Observations of the X-ray Pulsar XTE J1855-026 - a Possible New Supergiant System
- BeppoSAX observations of the accretion-powered X-ray pulsar SMC X-1
- X-ray bright sources in the Chandra Small Magellanic Cloud Wing Survey - detection of two new pulsars
Cited by in corpus (10)
- High-Mass X-ray binaries in the Small Magellanic Cloud
- Advances in Understanding High-Mass X-ray Binaries with INTEGRAL and Future Directions
- XMM-Newton observations of the Small Magellanic Cloud: Be/X-ray binary pulsars active between October 2006 and June 2007
- The X-ray properties of Be/X-ray pulsars in quiescence
- Exploring the Small Magellanic Cloud to the Faintest X-ray Fluxes: Source Catalog, Timing and Spectral Analysis
- The Chandra Small Magellanic Cloud Wing Survey - the search for X-ray Binaries
- Optical and X-ray variability of two Small Magellanic Cloud X-ray binary pulsars - SXP46.6 and SXP6.85
- Analysis of RXTE-PCA Observations of SMC X-1
- INTEGRAL deep observations of the Small Magellanic Cloud
- Deep Chandra Survey of the Small Magellanic Cloud. II. Timing Analysis of X-ray Pulsars