120 citations · 317 across the 11 of their papers we have counts for
9 papers · 1 filter
Astrometric excess noise in Gaia EDR3 and the search for X-ray binaries
P. Gandhi, D. A. H. Buckley, P. A. Charles +6
Astrometric noise (AEN) in excess of parallax and proper motion is a potential signature of orbital wobble of individual components in binary star systems. The combination of X-ray…
Astrometric excess noise in Gaia DR2 and the search for X-ray emitting binaries
Poshak Gandhi, David A. H. Buckley, Phil Charles +4
Astrometric noise in excess of parallax and proper motion could be a signature of orbital wobble of individual components in binary star systems. The combination of X-ray selection…
Estimation of the black hole spin in LMC X-1 using AstroSat
Sneha Prakash Mudambi, A. Rao, S. B. Gudennavar +2
LMC X-1, a persistent, rapidly rotating, extra-galactic, black hole X-ray binary (BHXB) discovered in 1969, has always been observed in its high soft state. Unlike many other BHXBs…
Orbital period dependent spatial scatter of Galactic Black Hole Transients
P. Gandhi, A. Rao, P. A. Charles +4
There remain significant uncertainties in the origin and evolution of black holes in binary systems, in particular regarding their birth sites and the influence of natal kicks. The…
A stochastic propagation model to the energy dependent rapid temporal behaviour of Cygnus X-1 as observed by AstroSat in the hard state
Bari Maqbool, M. Sneha Prakash, R. Misra +8
We report the results from analysis of six observations of Cygnus X-1 by Large Area X-ray Proportional Counters (LAXPC) and Soft X-ray Telescope (SXT) on-board AstroSat, when the s…
Effect of magnetic flux advection on the dynamics of shock in accretion flow around a rotating black hole
Biplob Sarkar, Anjali Rao
We investigate the dynamical behaviour of a magnetized, dissipative, accretion flow around a rapidly rotating black hole. We solve the magnetohydrodynamic equations and calculate t…
Gaia DR2 Distances and Peculiar Velocities for Galactic Black Hole Transients
Poshak Gandhi, Anjali Rao, Michael A. C. Johnson +2
We report on a first census of Galactic black hole X-ray binary (BHXRB) properties with the second data release (DR2) of {\em Gaia}, focusing on dynamically confirmed and strong ca…
Systematic Analysis of Low/Hard State RXTE Spectra of GX 339-4 to Constrain the Geometry of the System
Kalyani Bagri, Ranjeev Misra, Anjali Rao +2
One of the popular models for the low/hard state of Black Hole Binaries is that the standard accretion disk is truncated and the hot inner region produces via Comptonization, the h…
Why is IGR J17091-3624 so faint? Constraints on distance, mass, and spin from `phase-resolved' spectroscopy of the `heartbeat' oscillations
Anjali Rao, S. V. Vadawale
IGR J17091--3624 is a transient X-ray source and is believed to be a Galactic black hole candidate. Recently, it has received a considerable attention due to the detection of pecul…