1 citations · 1 across the 6 of their papers we have counts for
7 papers
Degeneracy in Accretion Disk Spectra from Naked Singularities and Kerr Black Holes: Application to the AGN MCG-06-30-15
Vishva Patel, Sayantan Bhattacharya, Sudip Bhattacharyya +1
Theoretical studies suggest that gravitational collapse can form either a black hole or a visible (naked) singularity. Identifying observational signatures that distinguish these t…
A continuous transition from Type-C Quasi Periodic Oscillations to the Heartbeat state in the Black hole X-ray binary 4U 1630-47
Chintan Patel, Sayantan Bhattacharya, Karan Akbari +2
We present a timing analysis of the black hole X-ray binary (BHXRB) 4U 1630-47 using AstroSat observations from 10-19 March 2023, for the first time capturing a rare and rapid tran…
Spin period evolution and X-ray spectral characteristics of the SMC pulsar SXP 46.6
Aman Kaushik, Sayantan Bhattacharya, Sudip Bhattacharyya
We characterize the Small Magellanic Cloud (SMC) pulsar SXP 46.6 using NuSTAR observations conducted in 2017. The spin period (P) of this neutron star decreased from its discovered…
The X-ray Variability and Luminosity Function of High Mass X-ray Binaries in the Dwarf Starburst Galaxy IC 10
Breanna A. Binder, Rosalie Lazarus, Mina Thoresen +2
We present an analysis of 235 ks of Chandra observations obtained over 19 years of the nearby dwarf starburst galaxy IC 10 in order to study the X-ray variability and X…
What causes long outbursts of neutron star low-mass X-ray binaries?
Sayantan Bhattacharya, Sudip Bhattacharyya
Many neutron star low-mass X-ray binaries (NS LMXBs) with short orbital periods (~hours) cycle between outburst and quiescent phases, and thus provide an excellent way to study the…
Variability study of classical supergiant X-ray binary 4U 1907+09 using NuSTAR
Raj Kumar, Sayantan Bhattacharya, Sudip Bhattacharyya +1
We investigate the X-ray variability of the supergiant X-ray binary 4U 1907+09 using the new NuSTAR observation of 2024. The source had a relatively stable flux level during previo…