Birendra Chhotaray

About

My research is mostly dedicated to investigating the transfer-accretion-ejection in Neutron Star X-ray Binaries through a multi-wavelength approach, probing matter under extreme gravity and magnetism. I am also actively involved in studying Active Galactic Nuclei (AGNs) and Black Hole X-ray Binaries (BHXRBs).

1. Accretion Physics & B-Field Probes in Strongly Magnetized Neutron Star Systems
2. Precessing and Warping in Circumstellar Disc of Be-type Stars
3. Geometric Mapping of the Circumstellar Be Disc using combining Optical polarimetry and High-Resolution Echelle Spectroscopy
4. Searching Rare Relativistic Outflows & Jet Launching from Strongly Magnetized Neutron Stars in Binary Systems
5. Thermonuclear Burst and Accretion Disc Interaction
6. Changing-Look AGNs

Employment

• Indian Institute of Astrophysics Post Doctoral Fellow
  2026 - Present
• Physical Research Laboratory Post Doctoral Fellow
  2024 - 2026

Education

• Physical Research Laboratory PhD
  2019 - 2024
• Indian Institute of Technology Gandhinagar PhD
  2019 - 2024
• Utkal University MSc
  2016 - 2018

Projects & Funding

Projects & funding information is unavailable.

Publications (19)

• Probing burst–disc interaction and disc reflection in SAX J1808.4−3658 with NICER, XMM–Newton, and NuSTAR
  Monthly Notices of the Royal Astronomical Society 2026 DOI: 10.1093/mnras/stag624
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• X-ray and radio view of the Be/X-ray binary pulsar 1A 1118−61 during the 2026 giant outburst
  Monthly Notices of the Royal Astronomical Society 2026 DOI: 10.1093/mnras/stag1452
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• Discovery of Changing-look Behavior in AGN NGC 3822: A Long-term Multiwavelength Study
  The Astrophysical Journal 2025 DOI: 10.3847/1538-4357/ae10ae
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• Discovery of Changing-Look behavior in AGN NGC 3822: A long-term multiwavelength study
  arXiv e-prints 2025 DOI: 10.48550/arXiv.2510.05599
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• Relativistic X-ray reflection and thermonuclear burst from accreting millisecond X-ray pulsar SRGA J144459.2–604207
  Monthly Notices of the Royal Astronomical Society 2025 DOI: 10.1093/mnras/staf1207
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• Broad-band study of the SMC pulsar RX J0032.9−7348 during its X-ray brightening in 2024
  Monthly Notices of the Royal Astronomical Society 2025 DOI: 10.1093/mnras/staf723
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• Long-term X-ray temporal and spectral study of a Seyfert galaxy Mrk 6
  Monthly Notices of the Royal Astronomical Society 2024 DOI: 10.1093/mnras/stae299
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• Long-term Study of the First Galactic Ultraluminous X-Ray Source Swift J0243.6+6124 Using NICER
  The Astrophysical Journal 2024 DOI: 10.3847/1538-4357/ad235d
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• Optical Spectroscopy of 1A 0535+262 Before, During, and After the 2020 Giant X-ray Outburst
  Bulletin de la Société Royale des Sciences de Liège 2024 DOI: 10.25518/0037-9565.11829
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• Optical and X-ray studies of the Be/X-ray binary IGR J06074+2205
  Monthly Notices of the Royal Astronomical Society 2024 DOI: 10.1093/mnras/stae2282
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