23 citations · 65 across the 7 of their papers we have counts for
9 papers
Probing the QPO and spectro-temporal evolution of MAXI J1750-327 with XPoSat during its first detected outburst : Constraints on black-hole mass and spin
Meghamani Haldar, Biki Ram, Shubhrangshu Ghosh +3
We present a comprehensive timing and broadband spectral study of the newly discovered black hole low-mass X-ray binary candidate MAXI J1750-327 during its August 2026 outburst, us…
Newly born extragalactic millisecond pulsars as efficient emitters of PeV neutrinos
Rajat K. Dey, Animesh Basak, Sabyasachi Ray +1
The origins of the diffuse flux of cosmogenic PeV neutrinos detected in the IceCube experiment during 2010 - 2017 remain unidentified. A population of extragalactic newly born fast…
Exact relativistic Newtonian representation of gravitational static spacetime geometries
Shubhrangshu Ghosh, Tamal Sarkar, Arunava Bhadra
We construct a self-consistent relativistic Newtonian analogue corresponding to gravitational static spherical symmetric spacetime geometries, staring directly from a generalized s…
Spectral lags of flaring events in 303 from RXTE Observations
Tamal Sarkar, Samir K Sarkar, Arunava Bhadra
This work reports the first discovery of (negative) spectral lags in the X-ray emission below 10 keV from the gamma ray binary 303 during large flaring episodes usin…
Effects of dark energy and flat rotation curve on the gravitational time delay of particle with non-zero mass
Tamal Sarkar, Shubhrangshu Ghosh, Arunava Bhadra
The effects of several dark energy models on gravitational time delay of particles with non-zero mass are investigated and analytical expressions for the same are obtained at the f…
Newtonian analogue of static general relativistic spacetimes: An extension to naked singularities
Shubhrangshu Ghosh, Tamal Sarkar, Arunava Bhadra
We formulate a generic Newtonian like analogous potential for static spherically symmetric general relativistic (GR) spacetime, and subsequently derived proper Newtonian like analo…
Newtonian analogue of corresponding spacetime dynamics of rotating black holes: Implication on black hole accretion
Shubhrangshu Ghosh, Tamal Sarkar, Arunava Bhadra
Based on the conserved Hamiltonian for a test particle, we have formulated a Newtonian analogue of Kerr spacetime in the `low energy limit of the test particle motion' that, in pri…
Newtonian analogue of Schwarzschild de-Sitter spacetime: Influence on the local kinematics in galaxies
Tamal Sarkar, Shubhrangshu Ghosh, Arunava Bhadra
The late time accelerated expansion of the Universe demands that even in local galactic-scales it is desirable to study astrophysical phenomena, particularly relativistic accretion…
A Study of Computer-Based Simulations for Nano-Systems and their types
Tamal Sarkar, Samir Chandra Das, Ardhendu Mandal
In most of the cases, the experimental study of Nanotechnology involves high cost for Laboratory set-up and the experimentation processes were also slow. So, one cannot rely on exp…