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Browsing Publications of Astronomical Society of India by Title

Browsing Publications of Astronomical Society of India by Title

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  • The Galactic centre region 
    Roy, Subhashis (Astronomical Society of India, 2004-09)
    We have observed the central 450 region of the Galaxy at 620 MHz band of the Giant Metrewave Radio Telescope (GMRT) in radio continuum, and measured the polarisation properties of 64 small diameter background extragalactic ...
  • Galactic supernova remnants: an updated catalogue and some statistics 
    Green, D. A (Astronomical Society of India, 2004-12)
    A catalogue of 231 Galactic supernova remnants (SNRs) is presented, and the selection effects applicable to the identification of remnants at radio wavelengths are discussed. In addition to missing low surface brightness ...
  • The galaxy as the fundamental plane of the solar star-cluster 
    Ridsdale, A. C (Astronomical Society of India, 1916)
  • Galaxy formation 
    Padmanabhan, T; Subramanian, K (Astronomical Society of India, 1992)
    An attempt is made to develop a consistent theory describing galaxy formation. First, a discussion of the smooth universe is presented. The linear theory of perturbations is introduced, and its applications are described. ...
  • Galaxy interactions, and the starburst galaxies - AGN connection. 
    Jog, C. J (Astronomical Society of India, 1995)
    Starbursts and Active Galactic Nuclei (AGN) are observed to preferentially occur in interacting or barred field galaxies. Galaxy interactions cause gas infall from the galactic disks, which may lead to the triggering of a ...
  • Galaxy mergers and globular clusters 
    van den Bergh, S (Astronomical Society of Indian, 1986-03)
    It is found from an analysis of recent observations that field ellipticals contain about five times, and Virgo ellipticals about 10 times, as many globular clusters as would be expected if they had been formed by merger ...
  • Gamma astronomy from space and from ground 
    Fleury, P (Astronomical Society of India, 2002)
    Ground based observations has come of age with the advent of the Whipple imaging telescope 10 years ago. The decade that followed has been a period of consolidation, with several detectors of performance comparable to that ...
  • Gamma ray analysis in planetary mapping 
    Yadav, J. S; Arnold, J. R (Astronomical Society of India, 1993)
    n this work, we present ways to improve the analysis procedure for high resolution gamma ray planetary mapping. This study is aimed at providing better analysis procedures for the Gamma Ray Spectrometer (GRS) experiment ...
  • Gamma ray and hadron generated Cverenkov photon spectra at various observation altitudes 
    Rahman, M. A; Bhat, P. N; Acharya, B. S; Chitnis, V. R; Majumdar, P; Vishwanath, P. R (Astronomical Society of India, 2002)
    We have studied the propagation of Cverenkov photons generated by Very High Energy gamma-rays and hadrons in the atmosphere. Photon production height distributions derived from semi-empirical methods agree with those ...
  • Gamma ray astronomy : New Indian initiatives 
    Bhat, C. L (Astronomical Society of India, 2000)
    In this brief review, major new initiatives presently under implementation in India in the field of gamma-ray astronomy are discussed in the backdrop of the just-concluded exploratory phase in the field.
  • Gamma Ray Astronomy in the Forefront again? 
    Lavakare, P. J (Astronomical Society of India, 1973)
  • Gamma Ray Burst Data Analysis: Algorithms and Procedure 
    Sinha, S (Astronomical Society of India, 2003)
    In Gamma Ray Burst experiments it is very important to obtain realistic and accurate estimates of the Burst parameters, viz. the event trigger time, the duration, peak hardness ratio, peak fluxes and fluences in different ...
  • The Gamma Ray Burst experiment on the Indian SROSS C-2 satellite 
    Sinha, S; Sreekumar, P; Kasturirangan, K (Astronomical Society of India, 2001)
    The SROSS C-2 satellite launched by the ASLV carried aloft a CsI gamma ray burst detector. To date, 51 GRB events have been detected unambiguously with 22 being common with BATSE. The experiment with its 2 ms time resolution, ...
  • Gamma ray bursts at high energies : detection ranges and event rates 
    Shanthi, K; Kaul, C. L; Kaul, R. K; Tickoo, A. K; Bhat, C. L (Astronomical Society of India, 2002)
    The Gamma-Ray Burst (GRB) detection rates at energies ? 20GeV, have been estimated for the 3 atmospheric Cerenkov telescope systems of the GRACE project at Mt. Abu, under the assumption that the bursts have a cosmological ...
  • Gamma ray observations of polars 
    Bhat, C. L (Astronomical Society of India, 1990)
    Experimental evidence is reported for the discovery of an entirely new class of gamma-ray binary objects involving a magnetic white dwarf rather than a neutron star degenerate primary. These sources may have photon energies ...
  • Gamma ray production in SNR's -contribution from photomeson process 
    Bhattacharya, S; Kaul, R. K; Kaul, C. L; Bhat, C. L (Astronomical Society of India, 1999)
    We estimate the integral γ-ray fluxes above 10 MeV photon energy, likely to result from neutral pion decay, following photomeson interactions between ultra-high energy protons accelerated in Supernova Remnants (SNR) and ...
  • Gamma-hadron separation using Cverenkov photon density fluctuations 
    Chitnis, V. R; Bhat, P. N (Astronomical Society of India, 2002)
    In atmospheric Cverenkov technique gamma-rays are detected against abundant background produced by hadronic showers. In order to improve signal to noise ratio of the experiment, it is necessary to reject a significant ...
  • Gamma-ray astronomy activities in BARC - an introductory note 
    Razdan, H (Astronomical Society of India, 1997)
  • Gamma-ray astronomy activities in BARC - Past contributions and present challenges 
    Razdan, H; Bhat, C. L (Astronomical Society of India, 1997)
    It was in the early seventies that we made a modest start in the Nuclear Research Laboratory (NRL) of the Bhabha Atomic Research Centre (BARC) in the then-budding field of observational gamma-ray astronomy by setting up ...
  • The Gap in the H-R Diagram of Open Clusters with Special Reference to NGC 2169, NGC 1778 and Tr I 
    Sagar, R; Joshi, U. C (Astronomical Society of India, 1978-06)
    The colour-magnitude diagrams of the open clusters NGC 1778 and Tr I indicate the presence of gaps on the rising branches of the evolving main sequnces. The positions of these gaps are compared with those found in other ...

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