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Accretion Flow Properties of EXO 1846-031 During its Multi-Peaked Outburst After Long Quiescence
Sujoy Kumar Nath, Dipak Debnath, Kaushik Chatterjee +3
We study the recent outburst of the black hole candidate EXO 1846-031 which went into an outburst in 2019 after almost 34 years in quiescence. We use archival data from Swift/XRT,…
Study of accretion flows around an ultraluminous X-ray source M82 X-1 using NuSTAR data
Santanu Mondal, Biswaraj Palit, Sandip K. Chakrabarti
We study the spectral properties and accretion flow behavior of an ultraluminous X-ray source M82\,X-1 using {\it NuSTAR} observations. We use the physical two component advective…
Flux and spectral variability of Mrk 421 during its moderate activity state using NuSTAR: Possible accretion disc contribution?
Santanu Mondal, Priyanka Rani, C. S. Stalin +2
The X-ray emission in BL Lac objects is believed to be dominated by synchrotron emission from their relativistic jets. However, when the jet emission is not strong, one could expec…
Transonic accretion and winds around Pseudo-Kerr black holes and comparison with general relativistic solutions
Abhrajit Bhattacharjee, Sandip K. Chakrabarti, Dipak Debnath
Spectral and timing properties of accretion flows on a black hole depend on their density and temperature distributions, which in turn come from the underlying dynamics. Thus, an a…
Spectral signature of mass outflow in Two Component Advective Flow Paradigm
Santanu Mondal, Sandip K. Chakrabarti
Outflows are common in many astrophysical systems. In the Two Component Advective Flow ({\fontfamily{qcr}\selectfont TCAF}) paradigm which is essentially a generalized Bondi flow i…
Accretion Properties of MAXI J1813-095 during its Failed Outburst in 2018
Arghajit Jana, Gaurava K. Jaisawal, Sachindra Naik +7
We present the results obtained from detailed timing and spectral studies of a black hole candidate MAXI~J1813-095 using {\it Swift}, {\it NICER}, and {\it NuSTAR} observations dur…