Welcome to the Digital Repository of Indian Institute of Astrophysics

This digital repository of Indian Institute of Astrophysics (IIAP), Bangalore, India is developed to capture, organize disseminate and preserve the research publications of IIAP. It also includes the in-house technical reports and annual reports in addition to various other grey literatures created within the institute.You can search, browse and access full text of these publications from the repository.

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  • Complex energy-dependent behaviour of quasiperiodic oscillations observed in GRS 1915+105 
    Sharma, Vaibhav; Misra, R; Jithesh, V; Chaudhary, Shivani; Jirawala, Khushi; Yadav, J. S; Jain, Pankaj; Juris, N. J (American Astronomical Society, 2026-09-10)
    We present complex energy-resolved properties of quasiperiodic oscillations (QPOs) in the black hole X-ray binary GRS 1915+105 using an observation from the LAXPC instrument onboard AstroSat. Power density spectra (PDSs) ...
  • Cosmic chance superpositions: Largest catalog of quasar-galaxy pairs at a projected separation of D ≲ 20 kpc 
    Guha, Labanya Kumar; Srianand, R; Dutta, Rajeshwari (American Astronomical Society, 2026-09-10)
    We present the largest catalogue to date of Galaxies On Top Of Quasars (GOTOQs)---systems where the sight line to a background quasar passes directly through or very close to a foreground galaxy. Using ~1.1 million quasar ...
  • Local patch analysis of ACT DR6 convergence map using morphological statistics 
    Bashir, Masroor; Nidharssan, S; Pravabati, C; Fazlu, Rahman; Goyal, Priya; Appleby, S; Park, C (American Physical Society, 2026-09-15)
    We perform a comprehensive hierarchical, multiscale morphological analysis to search for anomalous behavior in the large-scale matter distribution, using the convergence map from the Atacama Cosmology Telescope Data Release ...
  • Radiation-driven evolution and gas kinematics of the bright-rimmed cloud SFO 25 
    Porel, Puja; Archana Soam; Vacca, William D; Karoly, Janik (Oxford University Press on behalf of Royal Astronomical Society, 2026-09)
    Bright-rimmed clouds (BRCs) are valuable laboratories for investigating how ionizing radiation from massive stars reshapes molecular clouds and influences star formation. We present a kinematic and dynamical study of the ...
  • UOCS XX: Ultraviolet signatures of binary evolution in the open cluster Berkeley 21 
    Panthi, Anju; Deshmukh, Sanmesh; Chand, Komal; Vaidya, Kaushar (Oxford University Press on behalf of Royal Astronomical Society, 2026-09)
    We present a multiwavelength study of the intermediate-age (∼2.1 Gyr) open cluster Berkeley 21 using ultraviolet observations from AstroSat/UVIT together with archival optical and infrared data. A machine learning-based ...

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