Observational aspects of Outbursting Black Hole Sources - Evolution of Spectro-Temporal features and X-ray Variability

Abstract

We report on our attempt to understand the outbursting profile of Galactic Black Hole (GBH) sources, keeping in mind the evolution of temporal and spectral features during the outburst. We present results of evolution of Quasi-periodic Oscillations (QPOs), spectral states and possible connection with Jet ejections during the outburst phase. Further, we attempt to connect the observed X-ray variabilities (i.e., `class' / `structured' variabilities, similar to GRS 1915+105) with spectral states of BH sources. Towards these studies, we consider three Black Hole sources that have undergone single (XTE J1859+226), a few (IGR J17091-3624) and many (GX 339-4) outbursts since the start of RXTE era. Finally, we model the broadband energy spectra (3 - 150 keV) of different spectral states using RXTE and NuSTAR observations. Results are discussed in the context of two component advective flow model, while constraining the mass of the three BH sources.

arXiv commentAccepted for publication

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• AstroSat and MAXI view of the Black Hole binary 4U 1630-472 during 2016 and 2018 Outbursts
• IXPE and NICER view of Black hole X-ray binary 4U 1630-47: First significant detection of polarized emission in thermal state
• Constraining the mass of the black hole GX 339-4 using spectro-temporal analysis of multiple outbursts
• Broadband 'spectro-temporal' features of extragalactic black hole binaries LMC X-1 and LMC X-3: An AstroSat perspective
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• A Machine Learning approach for classification of accretion states of Black hole binaries
• A possible overall scenario for the outburst evolution of MAXI J1820+070 revealed by Insight-HXMT
• New insight into the hard X-ray emission influenced by the type-\uppercase\expandafter{\romannumeral1} bursts observed by Insight-HXMT during outburst of 4U 1636--536
• Multi-mission view of extragalactic black hole X-ray binaries LMC X-1 and LMC X-3: evolution of broadband spectral features