X-ray Observations of INTEGRAL Discovered Cataclysmic Variable IGR J17195-4100

TL;DR

This paper analyzes X-ray data of the new Intermediate Polar IGR J17195-4100, revealing its spin and orbital periods, spectral characteristics, and accretion geometry, indicating a likely disc-less accretion system.

Contribution

It reports the discovery of the spin and orbital periods and characterizes the spectral and variability features of IGR J17195-4100, providing new insights into its accretion structure.

Findings

Detected a 1053.7 s spin period in X-rays.

Identified a 3.52-hour orbital period.

Spectral analysis shows multi-temperature plasma with soft excess.

Abstract

We present analysis of archival X-ray data obtained with the XMM-Newton and Suzaku for a new Intermediate Polar identified as a counterpart of an INTEGRAL discovered gamma-ray source, IGR J17195-4100. We report a new period of 1053.7\pm12.2 s in X-rays. A new binary orbital period of 3.52+1.43-0.80 h is strongly indicated in the power spectrum of the time series. An ephemeris of the new period proposed as the spin period of the system has also been obtained. The various peaks detected in the power spectrum suggest a probable disc-less accretion system. The soft X-rays (<3 keV) dominate the variability seen in the X-ray light curves. The spin modulation shows energy dependence suggesting the possibility of a variable partial covering accretion column. The averaged spectral data obtained with XMM-Newton EPIC cameras show a multi temperature spectra with a soft excess. The latter can be attributed to the varying coverage of accretion curtains.