Detection of X-ray periodicity from a new eclipsing polar candidate XGPS-I J183251-100106
C. Y. Hui (1), K. A. Seo (1), C. P. Hu (2), L. C. C. Lin (3), Y., Chou (2) ((1) Chungnam National University, (2) National Central University,, (3) China Medical University)
TL;DR
This paper identifies a 1.5-hour X-ray periodicity in the source XGPS-I J183251-100106, suggesting it is an eclipsing polar-type magnetic cataclysmic variable with a thermal bremsstrahlung spectrum.
Contribution
It reports the discovery of X-ray periodicity and spectral characteristics confirming the source as a new eclipsing polar candidate.
Findings
Detected a 1.5-hour X-ray periodicity.
Spectrum modeled with thermal bremsstrahlung at ~50 keV.
Indications of an eclipsing polar-type system.
Abstract
We report the results from a detailed analysis of an archival XMM-Newton observation of the X-ray source XGPS-I J183251-100106, which has been suggested as a promising magnetic cataclysmic variable candidate based on its optical properties. A single periodic signal of 1.5 hrs is detected from all EPIC cameras on board XMM-Newton. The phase-averaged X-ray spectrum can be well-modeled with a thermal bremsstrahlung of a temperature kT~50 keV. Both X-ray spectral and temporal behavior of this system suggest it as a eclipsing cataclysmic variable of AM Herculis (or polar) type.
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