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The First X-Ray Polarimetry of an Eclipsing Low-Mass X-Ray Binary: Serendipitous IXPE Observation of AX J1745.6-2901
Romana Mikušincová, Lorenzo Marra, Hemanth Manikantan +38
We present the first X-ray polarimetric measurement of the neutron star low-mass X-ray binary system AX J1745.6-2901 conducted by the Imaging X-ray Polarimetry Explorer (IXPE) sate…
XMM-Newton view of pulsating iron fluorescent emission from Centaurus X3
Kinjal Roy, Hemanth Manikantan, Biswajit Paul
Cen X-3 is a bright, high-mass X-ray binary pulsar. We present a pulse phase-resolved X-ray spectral analysis of data from an archival XMM-Newton observation of Cen X-3 taken durin…
Unveiling the intensity-dependent wake structure of Vela X-1 using MAXI/GSC
Abhisek Tamang, Kinjal Roy, Hemanth Manikantan +2
Context. Vela X-1 is among the earliest discovered high-mass X-ray binary (HMXB) pulsars. In such systems, the companion's stellar wind is strongly affected by ionisation from X-ra…
Studying the X-ray absorption characteristics of Centaurus X-3 using nearly 14 years of MAXI/GSC data
Ajith Balu, Kinjal Roy, Hemanth Manikantan +2
Centaurus X-3 is a persistent high-mass X-ray binary with the long-term light curve from the source exhibiting orbit-to-orbit intensity variations with no apparent superorbital per…
Luminosity dependence of the multiple cyclotron lines in 4U 011563
Kinjal Roy, Hemanth Manikantan, Biswajit Paul
The Be X-ray binary 4U 011563 underwent a giant outburst in 2023 with the X-ray luminosity of the source reaching 10 erg s. During the outburst, two target of oppo…
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…
Detection of a cyclotron line in the Be X-ray pulsar IGR J060742205
Kinjal Roy, Rahul Sharma, Hemanth Manikantan +1
IGR J0607.4+2205 is a transient Be X-ray binary discovered two decades ago. IGR J0607.4+2205 underwent an outburst in 2023 during which it was observed twice with \textit{NuSTAR}.…
Studying the variability of fluorescence emission and the presence of clumpy wind in HMXB GX 3012 using XMM-Newton
Kinjal Roy, Hemanth Manikantan, Biswajit Paul
We present the results from an analysis of data from an \textit{XMM-Newton} observation of the accreting high mass X-ray binary pulsar GX 3012. Spectral analysis in the non-flar…
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,…
An investigation of the "10 keV feature" in the spectra of Accretion Powered X-ray Pulsars with NuSTAR
Hemanth Manikantan, Biswajit Paul, Vikram Rana
Some of the accreting X-ray pulsars are reported to exhibit a peculiar spectral feature at 10 keV, known as the "10 keV feature". The feature has been characterized as either…
Changes in the distribution of circum-binary material around the HMXB GX 301-2 during a rapid spin-up episode of the neutron star
Hemanth Manikantan, Biswajit Paul, Kinjal Roy +1
Some accretion powered X-ray pulsars with supergiant companion stars undergo occasional rapid spin-up episodes that last for weeks to a few months. We explore the changes in the ac…