49 citations · 90 across the 10 of their papers we have counts for
11 papers
Discovery of a Candidate 2 keV Cyclotron Resonance Scattering Feature in the HLX NGC 3583 X-1
Kiran M. Jayasurya, Aman Upadhyay, Vikram Rana
We present a broadband X-ray study of the transient hyperluminous X-ray source (HLX), 2SXPS J111416.1+481833, in the galaxy NGC 3583, using archival XMM-Newton, NuSTAR, Chandra dat…
Synchrotron radiation from NGC 470 HLX1 - a hidden hyperluminous accreting neutron star?
Tanuman Ghosh, Shiv Sethi, Gulab Chand Dewangan +3
We present the first broadband spectral analysis of NGC 470 HLX1, a hyperluminous X-ray source that exhibits significant flux variability over different epochs. We investigate the…
Probing spectral variability in NGC 4490 ULX-8 over 24 years of XMM-Newton, Chandra and Swift-XRT observations
Tarang Vashisht, Aru Beri, Tanuman Ghosh +2
We present a spectral variability study of the ultraluminous X-ray source NGC 4490 ULX-8 based on 14 Chandra, 6 XMM-Newton and 19 Swift-XRT observations obtained between 2000 and 2…
A Study of Spectral Variability between flaring and non-flaring state in M74 X-1
Aman Upadhyay, Tanuman Ghosh, Vikram Rana
We conducted an extensive long-term spectral and timing study of the ultraluminous X-ray source (ULX) M74 X-1, using data taken between 2001 and 2021 by Chandra and XMM-Newton X-ra…
Intriguing nature of AM Her type candidate CXOU J204734.8+300105
Rahul Sharma, Chetana Jain, Biswajit Paul +2
The detection and characterization of periodic X-ray signals are crucial for identifying new compact objects and studying the mechanisms powering their emission. We report on the t…
Energy dependence of Quasi-periodic oscillations in accreting X-ray pulsars
Hemanth Manikantan, Biswajit Paul, Rahul Sharma +2
We present the results from an investigation of the energy dependence of Quasi-Periodic Oscillations (QPOs) exhibited by accreting X-ray pulsars using data from archival \textit{XM…
Investigating the orbital evolution of the eccentric HMXB GX 3012 using long-term X-ray lightcurves
Hemanth Manikantan, Manish Kumar, Biswajit Paul +1
We report the orbital decay rate of the high mass X-ray binary GX 3012 from an analysis of its long-term X-ray light curves and pulsed flux histories from CGRO/BATSE, RXTE/ASM,…
A broadband X-ray study of the dwarf nova SS Cyg during quiescence and outburst
Anirban Dutta, Vikram Rana, Koji Mukai +1
We present a broadband X-ray study (\,0.3-50 keV) of the dwarf nova SS Cyg highlighting the changes in the accretion during two phases, the quiescence and the outburst states…
Super-Eddington accretion onto a stellar mass ultraluminous X-ray source NGC 4190 ULX1
Tanuman Ghosh, Vikram Rana
We present the results of high-quality XMM-NEWTON observations of a ULX in the galaxy NGC 4190. The detection of spectral cutoff in NGC 4190 ULX1 spectra rules out the interpretati…
Measuring the masses of Intermediate Polars with NuSTAR: V709 Cas, NY Lup and V1223 Sgr
A. W. Shaw, C. O. Heinke, K. Mukai +3
The X-ray spectra of intermediate polars can be modelled to give a direct measurement of white dwarf mass. Here we fit accretion column models to NuSTAR spectra of three intermedia…
Unambiguous Detection of Reflection in Magnetic Cataclysmic Variables: Joint NuSTAR-XMM-Newton Observations of Three Intermediate Polars
Koji Mukai, Vikram Rana, Federico Bernardini +1
In magnetic cataclysmic variables (CVs), X-ray emission regions are located close to the white dwarf surface, which is expected to reflect a significant fraction of intrinsic X-ray…