Monitoring of Transient Black Hole Candidates observed in the INTEGRAL survey

TL;DR

This paper presents the monitoring of transient black hole candidates during INTEGRAL survey observations, analyzing their time and spectral evolution to improve understanding of black hole outbursts.

Contribution

It provides the first detailed monitoring and analysis of the time and spectral evolution of seven transient black hole candidates observed by INTEGRAL.

Findings

Identification of 7 transient black hole outbursts

Analysis of spectral evolution during outbursts

Insights into black hole accretion processes

Abstract

The INTEGRAL/IBIS survey was performed collecting all the GPS and GCDE data together with all the available public data . The second catalogue, published in 2006 by Bird et al., is dominated by detection of 113 X-ray binaries, with 38 being high-mass and 67 low-mass. In most systems the compact object is a neutron star, but the sample also contains 4 confirmed Black Holes and 6 LMXB black hole candidates (BHC). There are also, in additional, 6 tentative associations as BHCs based simply on spectral and timing properties. In the sample of 12 sources (BHC and tentatively associated BHC) there are 7 transient sources that went into outbursts during the INTEGRAL survey observations. We present here the monitoring of the time and spectral evolution of these 7 outbursts.