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Browsing by Author "Chitnis, V. R"

Browsing by Author "Chitnis, V. R"

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  • Search for TeV gamma-rays from Geminga pulsar 
    Singh, B. B; Chitnis, V. R; Bose, D; Rahman, M. A; Upadhya, S. S; Gothe, K. S; Nagesh, B. K; Purohit, P. N; Rao, S. K; Rao, K. K; Sharma, S. K; Sudersan, P. V; Venkateshmurthy, B. L; Vishwanath, P. R; Acharya, B. S (Elsevier, 2009-09)
    We present the results of observation of the Geminga pulsar carried out in the TeV energy band during the 6 year period spanning 2000–2006 using the Pachmarhi Array of Cherenkov Telescopes (PACT). A long stretch of data, ...
  • Short-timescale γ -Ray Variability in CTA 102 
    Shukla, A; Mannheim, K; Patel, S. R; Roy, J; Chitnis, V. R; Dorner, D; Rao, A. R; Anupama, G. C; Wendel, C (IOP Publishing, 2018-02)
    The fl at-spectrum radio quasar CTA 102 experienced a prolonged state of enhanced activity across the entire observed electromagnetic spectrum during 2016 – 2017, most pronounced during a major outburst between ...
  • Status of HAGAR, the high altitude gamma ray observatory at Hanle 
    Chitnis, V. R; Acharya, B. S; Bhat, P. N; Cowsik, R; Prabhu, T. P; Srinivasan, R; Srivatsan, R; Vishwanath, P. R (Tata Institute of Fundamental Research, 2005)
    A 7 telescope array is planned to be constructed at Hanle in the Himalayas at an altitude of about 4200m above mean sea level for detecting celestial gamma-rays. The atmospheric Cerenkov light pool created by the ...
  • Status of the Himalayan Gamma-Ray Observatory (HIGRO) and observation with HAGAR at very high energies 
    Britto, R. J; Acharya, B. S; Anupama, G. C; Bhatt, N; Bhattacharjee, P; Bhattacharya, S; Chitnis, V. R; Cowsik, R; Dorji, N; Duhan, S. K; Gothe, K. S; Kamath, P. U; Koul, R; Mahesh, P. K; Manoharan, J; Mitra, A; Nagesh, B. K; Parmar, N. K; Prabhu, T. P; Rannot, R. C; Rao, S. K; Saha, L; Saleem, F; Saxena, A. K; Sharma, S. K; Shukla, A; Singh, B. B; Srinivasan, R; Srinivasulu, G; Sudersanan, P. V; Tickoo, A. K; Tsewang, D; Upadhya, S. S; Vishwanath, P. R; Yadav, K. K (French Society of Astronomy and Astrophysics, 2011-12)
    High Altitude GAmma Ray (HAGAR) telescope array, which is the first stage of HImalayan Gamma Ray Observatory (HIGRO), has been successfully installed at Hanle in Himalayas and has been collecting science data since September, ...
  • A study of the performance parameters of the High Altitude Gamma Ray (HAGAR) telescope system at Ladakh in India 
    Saha, L; Chitnis, V. R; Vishwanath, P. R; Kale, S; Shukla, A; Acharya, B. S; Anupama, G. C; Bhattacharjee, P; Britto, R. J; Prabhu, T. P; Singh, B. B (Elsevier Science B.V., 2013-02)
    We present results of Monte Carlo simulations for the High Altitude Gamma Ray (HAGAR) telescope array which detects very high energy gamma rays from astronomical sources. This telescope array, located at Hanle at an altitude ...
  • TeV Gamma-ray flares from Mkn 421 detected by the pachmarhi array of Cverenkov Telescopes 
    Bhat, P. N; Acharya, B. S; Chitnis, V. R; Majumdar, P; Rahman, M. A; Singh, B. B; Vishwanath, P. R (Astronomical Society of India, 2002)
    Pachmarhi Array of Cverenkov Telescopes (PACT), based on wavefront sampling technique, has been used for detecting TeV gamma rays from galactic and extra-galactic ?-ray sources. The Blaar, Mkn 421 was one such extra-galactic ...
  • Towards new analysis of Gamma-Ray sources at HImalayan Gamma-Ray Observatory (HIGRO) in northern India 
    Britto, R. J; Acharya, B. S; Anupama, G. C; Bhatt, N; Bhattacharjee, P; Bhattacharya, S; Chitnis, V. R; Cowsik, R; Dorji, N; Duhan, S. K; Gothe, K. S; Kamath, P. U; Koul, R; Mahesh, P. K; Mitra, A; Nagesh, B. K; Parmar, N. K; Prabhu, T. P; Rannot, R. C; Rao, S. K; Saha, L; Saleem, F; Saxena, A. K; Sharma, S. K; Shukla, A; Singh, B. B; Srinivasan, R; Srinivasulu, G; Sudersanan, P. V; Tickoo, A. K; Tsewang, D; Upadhya, S. S; Vishwanath, P. R; Yadav, K. K (French Society of Astronomy and Astrophysics, 2010-12)
    The High Altitude GAmma-Ray (HAGAR) array is a wavefront sampling array of 7 telescopes, set-up at Hanle, at 4270 m a.s.l., in the Ladakh region of the Himalayas (North India). It constitutes the first phase of the HImalayan ...
  • Very high energy gamma rays from geminga pulsar 
    Vishwanath, P. R; Sripathi Acharya, B; Bhat, P. N; Chitnis, V. R (International Union of Pure and Applied Physics, 2005)
  • VHE gamma-ray observation of Crab Nebula with HAGAR telescope array 
    Singh, B. B; Britto, R. J; Chitnis, V. R; Shukla, A; Saha, L; Sinha, A; Acharya, B. S; Vishwanath, P. R; Anupama, G. C; Bhattacharjee, P; Gothe, K .S; Nagesh, B. K; Prabhu, T. P; Rao, S. K; Srinivasan, R; Upadhya, S. S (Springer, 2019-12)
    HAGAR is a system of seven Non-imaging Atmospheric Cherenkov Telescopes located at Hanle in the Ladakh region of the Indian Himalay as at an altitude of 4270 meters amsl . Since 2008, we have observed the Crab Nebula to ...
  • X-Ray variability of active galactic nuclei in the soft and hard X-Ray bands 
    Chitnis, V. R; Pendharkar, J. K; Bose, D; Agrawal, V. K; Rao, A. R; Misra, R (Institute of Physics, 2009-06)
    We investigate the X-ray variability characteristics of hard X-ray-selected active galactic nuclei (AGNs)—based on Swift/Burst Alert Telescope—in the soft X-ray band using the Rossi X-ray Timing Explorer/All-Sky Monitor ...

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