7 citations · 14 across the 19 of their papers we have counts for
19 papers
Detection of hard X-ray pulsations in non-ULX X-ray pulsar 3X J0042 in M31
Ketan Rikame, Biswajit Paul
We report the detection of hard X-ray pulsations from the M31 accreting non-ULX X-ray pulsar 3X J0042 (3XMM J004232.1+411314) using archival NuSTAR observations. The source has a s…
Probing accretion dynamics and spin evolution in the X-ray pulsar RX J0520.5-6932 during its 2024 Outburst
Rahul Sharma, Aru Beri, Biswajit Paul +3
After nearly a decade of quiescence, the transient Be/X-ray binary pulsar RX J0520.5-6932 underwent an outburst in 2024. We performed X-ray monitoring of the source with NICER and…
Thermonuclear X-ray bursts across the eclipse transitions in the LMXBs EXO 0748-676 and XTE J1710-281
Ketan Rikame, Biswajit Paul, Rahul Sharma +1
The primary radiation from thermonuclear X-ray bursts observed in the neutron star low-mass X-ray binary (LMXB) systems can interact with various parts of the binary system. This i…
Reprocessing of X-rays emission in Ultra-Luminous X-ray sources
Manish Kumar, Rahul Sharma, Biswajit Paul
With the discovery of pulsations in some of the ultra-luminous X-ray sources (ULXs), it is quite clear that most of the ULXs harbor either a neutron star or a stellar mass black ho…
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…
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…
Sidebands to mHz QPOs in 4U 162667 in the second spin-down state
Rahul Sharma, Chetana Jain, Biswajit Paul +1
We report results from an Target-of-Opportunity (ToO) observation of 4U 162667, performed on 2023 May 18, soon after the discovery of torque reversal to spin-down in…
Discovery of a new phase-transient cyclotron line in A0535+26: Constraints on the accretion geometry
Ashwin Devaraj, Biswajit Paul, Varun Bhalerao +1
In November 2020, A0535+26 underwent one of its brightest outbursts, reaching nearly 12 Crab in X-ray flux. Observed by \textit{Insight-HXMT}, \textit{NuSTAR}, \textit{NICER}, and…
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…
Probing the energy and luminosity-dependent spectro-timing properties of RX J0440.9+4431 with AstroSat
Rahul Sharma, Manoj Mandal, Sabyasachi Pal +3
The Be/X-ray binary pulsar RX J0440.9+4431 went through a giant outburst in December 2022 with a peak flux of 2.3 Crab in 15--50 keV. We studied the broad-band timing and spe…
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…
A comprehensive study of orbital evolution of LMC X-4: Existence of a second derivative of the orbital period
Chetana Jain, Rahul Sharma, Biswajit Paul
We report here results from pulse arrival time delay analysis of the eclipsing high mass X-ray binary pulsar LMC X-4 using observations made with the Rossi X-ray Timing Explorer, X…
Flares during Eclipses of High Mass X-ray Binary Systems Vela X-1, 4U 1700-37, and LMC X-4
Ketan Rikame, Biswajit Paul, Rahul Sharma +2
In eclipsing X-ray binary systems, the direct X-ray emission is blocked by the companion star during the eclipse. We observe only reprocessed emission that contains clues about the…
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}.…
into the phase-dependent cyclotron line feature in XTE J1946+274: An and -HXMT view
Ashwin Devaraj, Rahul Sharma, Shwetha Nagesh +1
XTE J1946+274 is a Be/X-ray binary with a 15.8s spin period and 172 d orbital period. Using data of the 1998 outburst, a cyclotron line around 37 keV was report…
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…
AstroSat observation of the magnetar SGR J18300645 during its first detected X-ray outburst
Rahul Sharma, Chetana Jain, Biswajit Paul +1
We present here timing and spectral analyses of SGR J18300645 based on an AstroSat observation carried out on 2020 October 16, about a week after the onset of its first detected…
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,…