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Browsing by Author "Srinivasan, R"

Browsing by Author "Srinivasan, R"

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  • Data analysis method for the search of point sources of gamma rays with the HAGAR telescope array 
    Britto, R. J; Acharya, B. S; Anupama, G. C; Bhattacharjee, P; Chitnis, V. R; Cowsik, R; Dorji, N; Duhan, S. K; Gothe, K. S; Kamath, P. U; Mahesh, P. K; Manoharan, J; Nagesh, B. K; Parmar, N. K; Prabhu, T. P; 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; Tsewang, D; Upadhya, S. S; Vishwanath, P. R (French Society of Astronomy and Astrophysics, 2011-12)
    The High Altitude GAmma-Ray (HAGAR) experiment is the highest altitude atmospheric Cherenkov sampling array, set up at 4300 m amsl in the Himalayas (Northern India). It constitutes 7 telescopes, each one with seven 90 ...
  • Development of CCD camera systems at IIA 
    Naidu, B. N; Shankar, S. M; Srinivasan, R; Ravi, K; Nathan, S (Astronomical Society of India, 1998)
  • Fast Photometry Uisng CCD 
    Srinivasan, R; Muralishankar, S; Rajamohan, R (Indian Institute of Astrophysics, Bangalore, 1991)
    Observations of certain objects which exhibit fast changes in their light output seems to be of great interest in optical astronomy. Important informations can be obtained on their internal structures of the stars through ...
  • Fiber-fed echelle spectrometer of the 2.34 meter Vainu Bappu Telescope 
    Kameswara Rao, N; Sriram, S; Gabriel, F; Prasad, B. R; Samson, J. P. A; Jayakumar, K; Srinivasan, R; Mahesh, P. K; Giridhar, S (Anita Publications, 2004-12)
    The optical design and performance of high resolution fiber-fed echelle spectrometer for the 2.34 meter Vainu Bappu Telescope (VBT) is described. An optical fiber of core 100 J-Lm and length 45 meter is used to link the ...
  • FPGA Based ASM implementation for CCD Camera Controller 
    Srinivasan, R; Anupama, K; Suneeta; Saha, S. K; Rao, A (MacMillan Publishers Ind. Ltd, 2009)
    A general purpose CCD controller that can address any CCD, has been developed at the Indian Institute of Astrophysics. It is based on a Digital Signal Processor (DSP) chip, Motorola DSP 56002 for implementing essential ...
  • Gamma-ray source observations with the HAGAR telescope system at Hanle in the Himalayas 
    Britto, R. J; Acharya, B. S; Chitnis, V. R; Cowsik, R; Dorji, N; Duhan, S. K; Gothe, K. S; Kamath, P. U; Mahesh, P. K; Nagesh, B. K; Naidu, A; Parmar, N. K; Prabhu, T. P; 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; Tsewang, D; Upadhya, S. S; Vishwanath, P. R (Societe Francaise d’Astronomie et dAstrophysique, 2009-11)
    We have observed Crab nebula using the recently commissioned wavefront sampling high alti- tude (4270 m) array, HAGAR, at Hanle in the Ladakh region of the Himalayas. Regular source observations have begun with the ...
  • High altitude gamma ray observatory at Hanle 
    Sripathi Acharya, B; Cowsik, R; Bhat, P. N; Chitnis, V. R; Vishwanath, P. R; Prabhu, T. P; Srinivasan, R (International Union of Pure and Applied Physics, 2003-07)
    We have carried out Monte Carlo simulations to study the nature of Cherenkov light pool generated by γ -ray and proton primaries for the altitude of Hanle(4515m amsl) in the Himalayas, the site of proposed HAGAR experiment. ...
  • The Himalayan gamma ­ ray observatory at Hanle 
    Koul, R; Kaul, R. K; Mitra, A. K; Rannot, R. C; Acharya, B. S; Chitnis, V. R; Cowsik, R; Prabhu, T. P; Srinivasan, R; Srivatsan, R; Vishwanath, P (Tata Institute of Fundamental Research, 2005)
    A new gamma ray observatory comprising a large stereo imaging cherenkov telescope and an array of wave front sampling telescopes is being set up at the high altitude astronomical site at Hanle in the Ladakh region of ...
  • Image data acquisition system for large-format CCDs 
    Ananth, A. V; Srinivasan, R; Srinivasulu, G (SPIE, 1994-06)
    This paper describes the operation and performance of an IBM- PC/AT based image data acquisition system for large format CCDs. The system currently under development can handle image data from CCDs with pixel organization ...
  • Indian Astronomical Observatory, Hanle 
    Cowsik, R; Srinivasan, R; Prabhu, T (Astronomical Society of the Pacific, 2002)
    The Indian Institute of Astrophysics (IIA) Bangalore has established the Indian Astronomical Observatory (IAO) at an altitude of 4500 m above mean sea level atop Mt. Saraswati, Hanle, Changthang Ladakh, India. The birth ...
  • Indian Institute of Astrophysics Annual Report: 2005-06 
    Sastri, J. H; Srinivasan, R; Hasan, S. S (Indian Institute of Astrophysics, 2006)
  • Intensity oscillation in the corona as observed during the Total Solar Eclipse of 29 March 2006 
    Singh, J; Hasan, S. S; Gupta, G. R; Banerjee, D; Muneer, S; Raju, K. P; Bagare, S. P; Srinivasan, R (Springer, 2009-11)
    We obtained the images of the eastern part of the solar corona in the Fe xiv 530.3 nm (green) and Fe x 637.4 nm (red) coronal emission lines during the total solar eclipse of 29 March 2006 at Manavgat, Antalya, Turkey. ...
  • An introduction to the Indian Astronomical Observatory, Hanle 
    Cowsik, R; Srinivasan, R; Prabhu, T. P (Astronomical Society of India, 2002)
    Situated in the high-altitude cold desert of Changthang Ladakh bordering Himachal Pradesh and Tibet, Indian Astronomical Observatory, Hanle (32o46m46sN, 78o57'51''E; 4500 m above msl), provides excellent opportunities for ...
  • A modular cryostat for large format and mosaic CCDs 
    Nagaraja Naidu, B; Srinivasan, R; Sagay Nathan, K (Astronomical Society of India, 2001)
    With a growing requirement for wide field imaging, the era of mosaic CCDs is gaining importance in astronomical imaging. Large volume cryostats are needed to house large format and mosaic CCDs. A modular CCD cryostat has ...
  • Narrow Band Photometry in Emission Lines during the Total Solar Eclipse of October 24, 1995 
    Singh, J; Cowsik, R; Venkatakrishnan, P; Srinivasan, R; Chinnappan, V; Raju, K. P; Srikanth, R (Indian Institute of Astrophysics, Bangalore, 1997)
    To investigate the spatial variation of tempereture and density within coronal strucures, narrow band photometry in three coronal emission lines was done during this eclipse. The emission lines 6374 (FeX), 7892 (Fe XI) and ...
  • A New Digital Display System for the 1-meter Telescope at Vainu Bappu Observatory 
    Srinivasan, R; Naidu, B. N (Astronomical Society of the Pacific, 1997-01)
    The Carl-Zeiss 1-meter telescope at Vainu Bappu Observatory uses synchro transmitters as angular transducers in a 3-stage geared train for the two axes coordinate display system. Synchro receivers are used in the console ...
  • Object-oriented programming approach to CCD data acquisition and image processing 
    Naidu, B. N; Srinivasan, R; Muralishankar, S (SPIE-The International Society for Optical Engineering, 1997-10)
    In the recent past both the CCD camera controller hardware and software have witnessed a dynamic change to keep pace with the astronomer's imaging requirements. Conventional data acquisition software is based on menu driven ...
  • Observations with the High Altitude GAmma Ray (HAGAR) telescope array in the Indian Himalayas 
    Britto, R. J; Acharya, B. S; Anupama, G. C; Bhatt, N; Bhattacharjee, P; Bhattacharya, S. 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; Vishwanath, P. R; Yadav, K. K (French Society of Astronomy and Astrophysics, 2010-12)
    For several decades, it was thought that astrophysical sources emit high energy photons within the energy range of the gamma-ray region of the lectromagnetic spectrum also. These photons originate from interactions of high ...
  • Observations with the High Altitude GAmma-Ray (HAGAR) telescope array in the Indian Himalayas 
    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; Manoharan, J; 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 (Copernicus Publications, 2011-11)
    The High Altitude GAmma-Ray (HAGAR) array is a wavefront sampling array of 7 telescopes, set-up at Hanle, at 4270 m amsl, in the Ladakh region of the Himalayas (Northern India). It constitutes the first phase of the HImalayan ...
  • A PC/AT based image data acquisition processing system for CCD cameras 
    Ananth, A. V; Srinivasan, R; Srinivasulu, G (Council of Scientific and Industrial Research, 1991-08)

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