scholarly journals Evidence for two-component flows around the black hole candidate XTE J1550−564 from spectral features during its 1998-1999 outburst

2010 ◽  
Author(s):  
Broja G. Dutta ◽  
Sandip K. Chakrabarti
Keyword(s):  
Black Hole ◽  
Spectral Features ◽  
Black Hole Candidate ◽  
Two Component

scholarly journals Inference on accretion flow properties of XTE J1752-223 during its 2009-10 outburst

2020 ◽  
Vol 493 (2) ◽  
pp. 2452-2462 ◽  
Author(s):  
Kaushik Chatterjee ◽  
Dipak Debnath ◽  
Debjit Chatterjee ◽  
Arghajit Jana ◽  
Sandip K Chakrabarti
Keyword(s):  
Black Hole ◽  
Spectral Analysis ◽  
Low Frequency ◽  
Power Law Model ◽  
Flow Properties ◽  
Advective Flow ◽  
Black Hole Candidate ◽  
Two Component ◽  
Timing Properties ◽  
Spectral States

ABSTRACT Spectral and timing properties of the stellar-mass black hole candidate XTE J1752-223 during its 2009-10 outburst are studied using RXTE PCA data in the 2.5–25 keV energy range. Low frequency quasi-periodic oscillations are seen during outburst. The spectral analysis is done using two types of models: one is the combined disc blackbody plus power-law model and the other is Transonic flow solution based Two Component Advective Flow (TCAF) model. Light-curve profiles and evolution of hardness ratios are studied using MAXI GSC and Swift BAT data. Based on the evolution of the temporal and the spectral properties, we find that the object evolved through the following spectral states: hard, hard-intermediate, and soft-intermediate/soft. From the TCAF model fitted spectral analysis, we also estimate the probable mass of the black hole in the range of 8.1−11.9 M⊙, and more precisely, the mass appears to be 10 ± 1.9 M⊙.

scholarly journals Properties of Faint X-ray Activity of XTE J1908+094 in 2019

Galaxies ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 25
Author(s):  
Debjit Chatterjee ◽  
Arghajit Jana ◽  
Kaushik Chatterjee ◽  
Riya Bhowmick ◽  
Sujoy Kumar Nath ◽  
...  
Keyword(s):  
Black Hole ◽  
Temporal Analysis ◽  
Power Density Spectrum ◽  
Periodic Oscillations ◽  
Telescope Array ◽  
Density Spectrum ◽  
X Ray ◽  
Black Hole Candidate ◽  
Short Period ◽  
Spectral State

We study the properties of the faint X-ray activity of Galactic transient black hole candidate XTE J1908+094 during its 2019 outburst. Here, we report the results of detailed spectral and temporal analysis during this outburst using observations from Nuclear Spectroscopic Telescope Array (NuSTAR). We have not observed any quasi-periodic-oscillations (QPOs) in the power density spectrum (PDS). The spectral study suggests that the source remained in the softer (more precisely, in the soft–intermediate) spectral state during this short period of X-ray activity. We notice a faint but broad Fe Kα emission line at around 6.5 keV. We also estimate the probable mass of the black hole to be 6.5−0.7+0.5M⊙, with 90% confidence.

scholarly journals Spectrum of Two-Component Flows around a Supermassive Black Hole: An Application to M87

2008 ◽  
Vol 689 (1) ◽  
pp. L17-L20 ◽  
Author(s):  
Samir Mandal ◽  
Sandip K. Chakrabarti
Keyword(s):  
Black Hole ◽  
Supermassive Black Hole ◽  
Two Component

scholarly journals XMM-Newton and INTEGRAL observations of the black hole candidate XTE J1817-330

2007 ◽  
Vol 473 (2) ◽  
pp. 561-568 ◽  
Author(s):  
G. Sala ◽  
J. Greiner ◽  
M. Ajello ◽  
E. Bottacini ◽  
F. Haberl
Keyword(s):  
Black Hole ◽  
Black Hole Candidate

scholarly journals The reflection component in the average and heartbeat spectra of the black hole candidate IGR J17091-3642 during the 2016 outburst

2018 ◽  
Vol 478 (4) ◽  
pp. 4837-4850 ◽  
Author(s):  
Yanan Wang ◽  
Mariano Méndez ◽  
Diego Altamirano ◽  
James Court ◽  
Aru Beri ◽  
...  
Keyword(s):  
Black Hole ◽  
Black Hole Candidate ◽  
Reflection Component

scholarly journals INSIGHT-HXMT Observations of the New Black Hole Candidate MAXI J1535−571: Timing Analysis

2018 ◽  
Vol 866 (2) ◽  
pp. 122 ◽  
Author(s):  
Y. Huang ◽  
J. L. Qu ◽  
S. N. Zhang ◽  
Q. C. Bu ◽  
Y. P. Chen ◽  
...  
Keyword(s):  
Black Hole ◽  
Timing Analysis ◽  
Black Hole Candidate

scholarly journals UNDERSTANDING GALACTIC BLACK HOLE CANDIDATE GRS 1915+105

2002 ◽  
pp. 2279-2288 ◽  
Author(s):  
SANDIP K. CHAKRABARTI ◽  
S.G. MANICKAM ◽  
A. NANDI ◽  
A.R. RAO
Keyword(s):  
Black Hole ◽  
Black Hole Candidate ◽  
Galactic Black Hole

scholarly journals Repeated short-term spectral softening in the low/hard state of the Galactic black hole candidate Swift J1753.5-0127

2015 ◽  
Vol 67 (1) ◽  
pp. 11-11 ◽  
Author(s):  
A. Yoshikawa ◽  
S. Yamada ◽  
S. Nakahira ◽  
M. Matsuoka ◽  
H. Negoro ◽  
...  
Keyword(s):  
Black Hole ◽  
Short Term ◽  
Black Hole Candidate ◽  
Galactic Black Hole ◽  
Hard State
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