[HTML][HTML] Accretion flow dynamics during the evolution of timing and spectral properties of GX 339-4 during its 2010–11 outburst
A Nandi, D Debnath, S Mandal… - Astronomy & …, 2012 - aanda.org
Context. The Galactic transient black hole candidate (BHC) GX 339-4 exhibited several
outbursts at regular intervals of about two to three years in the Rossi X-ray Timing Explorer (RXTE…
outbursts at regular intervals of about two to three years in the Rossi X-ray Timing Explorer (RXTE…
[HTML][HTML] Evolution of the quasi-periodic oscillation frequency in GRO J1655-40–Implications for accretion disk dynamics
Context. Low and intermediate frequency quasi-periodic oscillations (QPOs) are thought to
be due to oscillations of Comptonizing regions or hot blobs embedded in Keplerian disks. …
be due to oscillations of Comptonizing regions or hot blobs embedded in Keplerian disks. …
IXPE and NICER view of black hole X-ray binary 4U 1630–47: First significant detection of polarized emission in thermal state
…, KM Jayasurya, VK Agrawal, A Nandi - Monthly Notices of the …, 2023 - academic.oup.com
We present a detailed spectro-polarimetric study of black hole X-ray binary 4U 1630−47
during its 2022 outburst with IXPE and NICER observations. The source is observed in disc …
during its 2022 outburst with IXPE and NICER observations. The source is observed in disc …
[HTML][HTML] Properties of the propagating shock wave in the accretion flow around GX 339-4 in the 2010 outburst
D Debnath, SK Chakrabarti, A Nandi - Astronomy & Astrophysics, 2010 - aanda.org
Context. The black hole candidate GX 339-4 exhibited an X-ray outburst in January 2010,
which is still continuing. We here discuss the timing and the spectral properties of the outburst …
which is still continuing. We here discuss the timing and the spectral properties of the outburst …
AstroSat view of MAXI J1535−571: broad-band spectro-temporal features
…, TB Katoch, S Mandal, A Nandi - Monthly Notices of …, 2019 - academic.oup.com
We present the results of Target of Opportunity (ToO) observations made with AstroSat of
the newly discovered black hole binary MAXI J1535−571. We detect prominent C-type quasi-…
the newly discovered black hole binary MAXI J1535−571. We detect prominent C-type quasi-…
Evolution of the temporal and the spectral properties in 2010 and 2011 outbursts of H 1743-322
D Debnath, SK Chakrabarti, A Nandi - Advances in Space Research, 2013 - Elsevier
The Galactic black hole candidate H 1743-322 exhibited two X-ray outbursts in rapid succession:
one in August 2010 and the other in April 2011. We analyze archival data of this object …
one in August 2010 and the other in April 2011. We analyze archival data of this object …
AstroSat and MAXI view of the black hole binary 4U 1630−472 during 2016 and 2018 outbursts
…, T Katoch, HM Antia, S Mandal, A Nandi - Monthly Notices of …, 2020 - academic.oup.com
We present an in-depth spectral and timing analysis of the black hole binary 4U 1630−472
during 2016 and 2018 outbursts as observed by AstroSat and MAXI. The extensive coverage …
during 2016 and 2018 outbursts as observed by AstroSat and MAXI. The extensive coverage …
Wideband study of the brightest black hole X-ray binary 4U 1543− 47 in the 2021 outburst: signature of disc-wind regulated accretion
…, S Mandal, GR Bhuvana, A Nandi - Monthly Notices of the …, 2023 - academic.oup.com
A comprehensive wideband spectral analysis of the brightest black hole X-ray binary 4U
1543−47 during its 2021 outburst is carried out for the first time using NICER, NuSTAR, and …
1543−47 during its 2021 outburst is carried out for the first time using NICER, NuSTAR, and …
Wide-band view of high-frequency quasi-periodic oscillations of GRS 1915+105 in 'softer' variability classes observed with AstroSat
We present a comprehensive temporal and spectral analysis of the ‘softer’ variability classes
(ie θ, β, δ, ρ, κ, ω and γ) of the source GRS 1915+105 observed by AstroSat during the 2016…
(ie θ, β, δ, ρ, κ, ω and γ) of the source GRS 1915+105 observed by AstroSat during the 2016…
Periodic mass loss from viscous accretion flows around black holes
S Das, I Chattopadhyay, A Nandi… - Monthly Notices of the …, 2014 - academic.oup.com
We investigate the behaviour of low angular momentum viscous accretion flows around black
holes using smooth particle hydrodynamics method. Earlier, it has been observed that in a …
holes using smooth particle hydrodynamics method. Earlier, it has been observed that in a …