446 citations
- Center for Excellence in Basic SciencesIN83 papers
- Tata Institute of Fundamental ResearchIN70 papers
- Inter-University Centre for Astronomy and AstrophysicsIN28 papers
- Bhabha Atomic Research CentreIN16 papers
- Centre National de la Recherche ScientifiqueFR15 papers
- Raman Research InstituteIN13 papers
- Indian Institute of Science BangaloreIN12 papers
- Aryabhatta Research Institute of Observational SciencesIN11 papers
- Homi Bhabha National InstituteIN11 papers
- Indian Institute of Technology BombayIN11 papers
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- Manipal University Jaipur10 papers
34 papers · 1 filter
A NICER and AstroSat view of the neutron star low-mass X-ray binary 1A 1246-588
Vaidehi Poojyam, Vikas Mistry, Yash Bhargava +2
Neutron star (NS) low-mass X-ray binary (LMXB) systems depict a variety of X-ray spectral and timing features, which can be useful to probe the accretion-ejection mechanism in the…
AstroSat timing and spectral analysis of the accretion-powered millisecond X-ray pulsar IGR J17591--2342
Akshay Singh, Andrea Sanna, Sudip Bhattacharyya +5
IGR J17591--2342, a transient accretion-powered millisecond X-ray pulsar, was discovered during its 2018 outburst. Here, we present a timing and spectral analysis of the source usi…
Discovery of evolving low-frequency QPOs in hard X-rays ( keV) observed in black hole Swift J1727.8-1613 with
Anuj Nandi, Santabrata Das, Seshadri Majumder +3
We report the first detection of evolving Low-Frequency Quasi-periodic Oscillation (LFQPO) frequencies in hard X-rays upto keV with during `unusual' outburst…
AstroSat Observation of X-ray Dips and State Transition in the Black Hole Candidate MAXI J1803-298
Arghajit Jana, Sachindra Naik, Gaurava K. Jaisawal +3
We present the results obtained from broadband X-ray timing and spectral analysis of black hole candidate MAXI J1803-298 using an AstroSat observation on May 11-12, 2021. Four peri…
Detection of nearly periodic spin period reversals in Vela X-1 on long time-scales: inkling of solar-like cycle in the donor star?
Amar Deo Chandra, Jayashree Roy, P. C. Agrawal +1
We explore the long-term evolution of the spin period of the High Mass X-ray Binary (HMXB) pulsar Vela X-1 over a period of 46 yr. Our analysis indicates nearly periodic variations…
Studies of Cepheus X-4 during 2018 outburst observed with AstroSat
Kallol Mukerjee, H. M. Antia
We present timing and spectral results of 2018 outburst of Cepheus X-4, observed twice by AstroSat at luminosity of erg s and erg…