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Browsing by Author "Tickoo, A. K"

Browsing by Author "Tickoo, A. K"

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  • Search for a TeV photon signal from the Crab pulsar 
    Sapru, M. L; Kaul, R. K; Bhat, C. L; Dhar, V. K; Rannot, R. C; Tickoo, A. K (Astronomical Society of India, 1996)
  • Search for pulsed Te V gamma- rays from Crab pulsar with the TACTIC Imaging gamma-ray Telescope 
    Rannot, R. C; Yadav, K. K; Dhar, V. K; Tickoo, A. K; Bhatt, N; Bhattacharyya, S; Chandra, P; Goyal, H. C; Kaul, C. L; Kaul, R. K; Kothari, M; Kotwal, S; Koul, R; Sahayanathan, S; Sapru, M. L; Sharma, M; Venugopal, K; Bhat, C. L (Astronomical Society of India, 2002-09)
    The TACTIC Imaging Element has observed Crab Nebula/pulsar for a total. of about 40 hours during Jan.- Mar. 2001. Preliminary results do not show any evidence of the 33 ms pulsations from the pulsar direction at an energy ...
  • A search for TeV photons from 4U0115 + 63 
    Rannot, R. C; Bhat, C. L; Senecha, V. K; Sapru, M. L; Tickoo, A. K; Kaul, R. K; Rawat, H. S (Astronomical Society of India, 1993)
    An analysis of 47 hours of data collected by the Gulmarg gamma-ray telescope during the period 1989 September 27-October 30, indicates absence of a statistically significant steady, persistent-pulsed or episodic pulsed ...
  • Sensitivity and energy resolution estimates of the TACTIC gamma-ray telescope - Inputs from simulation studies (II) 
    Koul, M. K; Rannot, R. C; Sapru, M. L; Sathyabama, N; Bhat, C. L; Tickoo, A. K; Razdan, A. K; Gandhi, V. N (Astronomical Society of India, 1999)
    The response of the recently-commissioned TACTIC imaging Cerenkov telescope to atmospheric Cerenkov pulses produced by cosmid gamma-ray and hadron-initiated extensive air-showers has been studied through Monte Carlo ...
  • Simulation and experimental studies of polarization properties of atmospheric Cerenkov pulses 
    Bhat, C. L; Rannot, R. C; Mohapatra, D. K; Gandhi, V. N; Tickoo, A. K; Kaul, R; Kaul, S. K; Kaul, S. R; Goyal, H. C; Bhatt, N (Astronomical Society of India, 1999)
    We present here preliminary results obtained form some simulation and experimental investigations on the polarization state of atmospheric Cerenkov events.
  • Site-selection studies at Gurushikar, Mt. Abu for project 'GRACE' 
    Sapru, M. L; Bhat, C. L; Kaul, M. K; Kaul, S. K; Kaul, S. R; Dhar, V. K; Kaul, R. K; Rannot, R. C; Tickoo, A. K (Astronomical Society of India, 1993)
    Holding the promise of yielding up to 1150 hrs of good-quality atmospheric Cerenkov data per calendar year, Gurushikar in Mt. Abu, Rajasthan, offers itself as a good observatory site for our proposed new gamma-ray astrophysics ...
  • Some representative Cerenkov light images recorded by 144-pixel SHALON gamma-ray telescope 
    Nikolsky, S. I; Sinitsyna, V. G; Acobian, A. M; Matizov, B; Vorobiov, S. P; Bhat, C. L; Tickoo, A. K; Rannot, R. C; Sapru, M. L; Razdan, H (Astronomical Society of India, 1993)
    The 144-pixel SHALON imaging telescope was deployed on the nights of 1993 January 20 and 21 to record Cerenkov images of sample cosmic-ray events coming from the direction of zenith. Here, in this preliminary work, we ...
  • A spectral-ratio based trigger generator for TACTIC vertex elements 
    Kaul, I. K; Kaul, S. R; Tickoo, A. K; Koul, R; Bhat, C. L (Astronomical Society of India, 2000)
    An unconventional hardware trigger-generator, based on an on-line estimation of the spectral-ratio of the Cerenkov radiation, has been developed for the three Vertex Elements of the TACTIC gamma-ray telescope array. The ...
  • Spot size of 17m-diameter MACE reflector in presence of surface inaccuracies 
    Koul, D. K; Koul, M. K; Tickoo, A. K; Bhat, C. L (Astronomical Society of India, 2002)
    The MACE (for Major Atmospheric Cerenkov Experiment), an imaging cerenkov telescope for gamma-ray astronomy investigations in the sub-TeV energy bracket, plans to use a 17 m-diameter high quality reflecter mounted with a ...
  • 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, ...
  • Threshold energy estimates of TACTIC array elements 
    Sapru, M. L; Satyabhama, N; Koul, M. K; Tickoo, A. K; Bhat, C. L (Astronomical Society of India, 2002)
    Using the CORSIKA-code based simulation studies, we present here results on the gamma-ray and the cosmic-ray proton trigger-thresholds for the Imaging-Element and the 3 Vertex-Elements of the TACTIC atmospheric Cerenkov ...
  • Threshold energy estimates of TACTIC gamma-ray telescope array-Inputs for simulations studies (I) 
    Sathyabama, N; Sapru, M. L; Bhat, C. L; Rannot, R. C; Razdan, A. K; Tickoo, A. K; Koul, M. K; Gandhi, V. N (Astronomical Society of India, 1999)
    Comprehensive simulation studies, using the CORSIKA air-shower code are in progress to predict and optimize the performance of the TACTIC gamma-ray telescope array. Preliminary results are presensted here on the gamma-ray ...
  • Towards absolute gain calibration of the TACTIC imaging element 
    Tickoo, A. K; Dhar, V. K; Venugopal, K; Yadav, K. K; Kaul, S. K; Koul, R; Kothari, M. K; Goyal, H. C; Chandra, P; Bhatt, N; Bhat, C. L (Astronomical Society of India, 2002)
    The imaging element of the 4-element TACTIC telescope array has been in operation at Mt. Abu since 1997, for carrying out detailed investigations of gamma-ray sources in the TeV energy range. In order to characterize the ...
  • 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 ...

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