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Browsing by Subject "Gamma rays"

Browsing by Subject "Gamma rays"

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  • Conversion of Neutron Stars to Strange Stars as the Central Engine of Gamma-Ray Bursts 
    Bombaci, I; Datta, B (The American Astronomical Society, 2000-02)
    We study the conversion of a neutron star to a strange star as a possible energy source for gamma-ray bursts. We use different recent models for the equation of state of neutron star matter and strange quark matter. We ...
  • EGRET gamma-ray sources : Observations and physics 
    Mukherjee, R (Astronomical Society of India, 2002)
    High energy astronomy above 30 MeV received a significant impetus from the observations of EGRET (Energetic Gamma-Ray Experiment Telescope) on board the Compton Gamma Ray Observatory (CGRO). Until June 2000, when CGRO was ...
  • GRB 051028: an intrinsically faint gamma-ray burst at high redshift? 
    Castro-Tirado, A. J; Jelínek, M; Pandey, S. B; McBreen, S; de Jong, J; Sahu, D. K; Ferrero, P; Caballero, J. A; Gorosabel, J; Kann, D. A; Klose, S; de Ugarte Postigo, A; Anupama, G. C; Gry, C; Guziy, S; Srividya, S; Valdivielso, L; Vanniarajan, S; Henden, A. A (EDP Sciences, 2006-12)
    We present multiwavelength observations of the gamma-ray burst GRB 051028 detected by HETE-2 in order to derive its afterglow emission parameters and to determine the reason for its optical faintness when compared to other ...
  • Hard X-rays and gamma rays from the Be star LSI +61-303 
    Apparao, K. M. V (Astronomical Society of India, 2000)
    The hard x-ray flux resulting from inverse Compton scattering of photons from the Be star by the high energy electrons responsible for the radio emission, is calculated and compared with observation.
  • Optical observations of GRB 060124 afterglow: a case for an injection break 
    Misra, K; Bhattacharya, D; Sahu, D. K; Sagar, R; Anupama, G. C; Castro-Tirado, A. J; Guziy, S. S; Bhatt, B. C (EDP Sciences, 2007-03)
    Aims.We present broad band optical afterglow observations of a long duration GRB 060124 using the 1.04-m Sampurnanand Telescope at ARIES, Nainital and the 2.01-m HCT at IAO, Hanle, including the earliest ground-based ...
  • 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)
  • Solar coronal rotation determined by X-ray bright points in Hinode/XRT and Yohkoh/SXT full-disc images 
    Kariyappa, R (EDP Sciences, 2008-09)
    Aims. Our aim is to identify and trace the X-ray bright points (XBPs) over the disc and use them as tracers to determine the coronal rotation. This investigation will help to clarify and understand several issues: (i) ...

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