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Browsing by Author "Dhiman, Vinit"

Browsing by Author "Dhiman, Vinit"

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  • Intra-night optical flux and polarization variability of BL Lacertae during its 2020–2021 high state 
    Bachev, Rumen; Tripathi, Tushar; Gupta, Alok C.; Kishore, Shubham; Gaur, Haritma; Dhiman, Vinit (Monthly Notices of the Royal Astronomical Society, 2023-06)
    In this work, we report the presence of rapid intra-night optical variations in both flux and polarization of the blazar BL Lacertae during its unprecedented 2020–2021 high state of brightness. The object showed significant ...
  • Multiband optical variability of the TeV blazar PG 1553 + 113 in 2019 
    Dhiman, Vinit; Gupta, Alok C. ,et.al.; Gaur, Haritma (Monthly Notices of the Royal Astronomical Society, 2023-02)
    We report the flux and spectral variability of PG 1553 + 113 on intra-night (IDV) to short-term time-scales using BVRI data collected over 91 nights from 28 February to 8 November 2019 employing 10 optical telescopes: ...
  • Multiband optical variability on diverse time-scales of the TeV blazar TXS 0506 + 056, the first cosmic neutrino source 
    Dhiman, Vinit; Gupta, Alok C.; Bachev, Rumen; Wiita, Paul J.; Cellone, Sergio A.; Strigachev, A.; Gaur, Haritma; Darriba, A.; Bisen, D. P.; Locatelli, G.; Mammana, L. A.; Semkov, E. (Monthly Notices of the Royal Astronomical Society, 2024-01)
    We report the first extensive optical flux and spectral variability study of the TeV blazar TXS 0506 + 056 on intranight to long-term time-scales using BVRI data collected over 220 nights between 2017 January 21 to 2022 ...
  • Optical and X-ray Studies of TeV Blazars 
    Dhiman, Vinit (ARIES, Nainital, 2023-10-10)
    Blazars consisting of BL Lacertae objects (BL Lacs; featureless compsite optical/UV spectra) and flat-spectrum radio quasars (FSRQs; promi nent emission lines in composite optical/UV spectra), are the active galactic ...
  • Optical intraday variability of the blazar S5 0716+714 
    Tripathi, Tushar; Gupta, Alok C.; Takey, Ali; Bachev, Rumen; Vince, Oliver; Strigachev, Anton; Kushwaha, Pankaj; Elhosseiny, E. G.; Wiita, Paul J.; Damljanovic, G.; Dhiman, Vinit; Fouad, A.; Gaur, Haritma; Gu, Minfeng; Hamed, G. E.; Kishore, Shubham; Kurtenkov, A.; Rastogi, Shantanu; Semkov, E.; Zead, I.; Zhang, Zhongli (Monthly Notices of the Royal Astronomical Society, 2024-01)
    We present an extensive recent multiband optical photometric observations of the blazar S5 0716+714 carried out over 53 nights with two telescopes in India, two in Bulgaria, one in Serbia, and one in Egypt during 2019 ...
  • X-Ray Intraday Variability of the TeV Blazar Markarian 421 with XMM-Newton 
    Noel, A Priyana, et.al.; Gaur, Haritma; Gupta, Alok C.; Dhiman, Vinit (The Astrophysical Journal Supplement Series, 2022-09)
    Highly variable Markarian 421 is a bright high–synchrotron energy peaked blazar showing a wide featureless nonthermal spectrum, making it a good candidate for our study of intraday flux and spectral variations over time. We ...

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