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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…
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}.…