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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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  • GMRT study of extremely faint dwarf irregular galaxies 
    Begum, A; Chengalur, J. N (Astronomical Society of India, 2004-09)
    We present results of deep, high velocity resolution (~1.6 km s-1) Giant Metrewave Radio Telescope (GMRT) HI 21 cm-line observations of a sample of extremely faint (MB > -12.5) dwarf irregular galaxies. unlike previous ...
  • GONG instrument and science 
    Harvey, J; The GONG Team (Astronomical Society of India, 1998-09)
    The Global Oscillation Network Group (GONG) is an international project to study the solar interior using helioseismology. The major goal is to accurately measure those modes of solar acoustic oscillations that have global ...
  • GONG p-mode frequency changes with solar activity 
    Bhatnagar, A; Jain, K; Tripathy, S. C (Astronomical Society of India, 2000)
    In this paper, we present a correlation study of nine solar activity indices with p-mode frequency shifts obtained from the GONG data. It is found that the two are closely correlated and a linear relationship exits. Further, ...
  • GONG site evaluation program at Udaipur Solar Observatory 
    Ambastha, A; Bhatnagar, A; Jain, R; Srivastava, N; Gupta, S; Sharma, R; Agrawal, G (Astronomical Society of India, 1991)
    The Global Oscillations Network Group (GONG) project to study the internal structure and dynamic of the sun is discussed. The GONG project will measure waves that penetrate throughout the sun's core. Power spectra of the ...
  • Gravitational collapse of inhomogeneous dust: Naked singularities, black hole formation and Hawking evaporation 
    Unnikrishnan, C. S (Astronomical Society of India, 1993)
    There are several examples of existence of naked singularities in models of spherically symmetric gravitational collapse and they are considered to be counter-examples to the Cosmic Censorship (CCC). In fact, there were ...
  • Gravitational Interactions Between Galaxies 
    Alladin, S. M (Astronomical Society of India, 1975-03)
  • A gravitational lens probe of galaxy-scale dark matter? 
    Sunita Nair (Astronomical Society of India, 1993)
    We present a model for an observed gravitationally lensed system, MG2016+112. We assume that there are two galaxies acting as lenses (as suggested by the observations), each with a diffuse dark matter halo. It is shown ...
  • Gravitational wave astronomy: Recent advances 
    Dhurandhar, S. V (Astronomical Society of India, 2002-09)
    Several groundbased gravitational wave (GW) laser interferometric projects have completed construction and are currently involved in conducting engineering runs. The spacebased NASA-ESA mission, LISA is expected to be ...
  • Gravitational Wave Astronomy:Probing Physics and Unravelling Astrophysics 
    Iyer, B. R (Astronomical Society of India, 2002-09)
    Kilometer scale Laser Interferometer Gravitational Wave Detectors like LIGO (vntGO) are expected to go online in 2002 (2003). Space interferometers like LISA are scheduled for 2011. In this talk the possible science payoffs ...
  • GRB 000301C with peculiar afterglow emission 
    Sagar, R; Mohan, V; Pandey, S. B; Pandey, A. K; Stalin, C. S; Castro-Tirado, A. J (Astronomical Society of India, 2000)
    The CCD magnitudes in Johnson V and Cousins R and I photometric passbands are determined for GRB 000301C afterglow starting ~ 1.5 day after the γ - ray burst. In fact we provide the earliest optical observations for this ...
  • GRB 000926 and its optical afterglow : Another possible evidence for non-isotropic emission 
    Sagar, R; Pandey, S. B; Mohan, V; Bhattacharya, D; Castro-Tirado, A. J (Astronomical Society of India, 2001)
    The CCD Johnson BV and Cousins RI photomertric magnitudes are determined for 20 stars in the field of GRB 000926. They are used to calibrate the present R as well as published BVRI photometric magnitudes of the GRB 000926 ...
  • The Great Star Map 
    Chatwood, A. B (Astronomical Society of India, 1915)
  • Grinding a 16-inch speculum by hand 
    Buchanan, W. E (Astronomical Society of India, 1911-03)
  • Ground Based Microwave Radiometric Technique in Remote Sensing 
    Rangarajan, K. E; Varghese, B. A (Astronomical Society of India, 2003)
    As an important tool of atmospheric remote sensing, microwave radiometers are used for temperature profiling and vapor and liquid column measurements. In addition, ice water path can be retrieved using radiometer observations. ...
  • Ground-based - γ ray astronomy : Present status and future prospects 
    Bhat, C. L (Astronomical Society of India, 1997)
    In this article, we review the observational scene in ground based γ-ray astronomy as it has changed from a rather ambiguous exploratory-phase in the eighties to a more unequivocal consolidation–phase in the recent times. ...
  • Ground-based detection of cosmic gamma-ray bursts through atmospheric scintillation technique - A feasibility study 
    Bhat, C. L; Tickoo, A. K; Koul, R; Dhar, V. K; Shanthi, K (Astronomical Society of India, 1999)
    A ground-based experiment is proposed for detecting cosmic gamma-ray bursts. The underlying detection strategy and some salient features of the instrument are discussed in this paper.
  • Ground-based Very High Energy Gamma-Ray Astronomy at Pachmarhi 
    Acharya, B. S; Bhat, P. N; D'Souza, A. I; Francis, J; Gothe, K. S; John, A. V; Joshi, S. R; Krishnaswamy, M. R; Mehta, S; Nagesh, B. K; Pereira, M. P; Purohit, P. N; Rao, K. S; Rao, M. V. S; Satyanarayana, G. P; Sudershanan, P. V; Upadhyaya, S. S; Venkateshamurthy, B. L; Vishwanath, P. R (Astronomical Society of India, 1996)
  • The growth of publications of the Astronomical Society of India 
    Gupta, S. K; Sinha, K (Astronomical Society of India, 1991)
  • Growth of the Centre of Advanced Study in Astronomy at the Osmania University 
    Abhyankar, K. D (Astronomical Society of India, 1997)
    After giving a brief historical introduction, the 48-inch telescope project is traced through its different phases of site survey, construction of the dome and installation of the telescope. Then follows a review of the ...
  • GSC 2701-2527, A New Multiperiodic High-Amplitude Delta Scuti Variable 
    Kjurkchieva, D. P; Dimitrov, D. P; Ibryamov, S. I.; Srinivasa Rao, M (Astronomical Society of India, 2013-06)
    Our BVI photometric observations reveal that GSC 2701-2527 is a high amplitude ᵟ Scuti star with quite low temperature. The frequency analysis exhibits that it is multiperiodic pulsator. The obtained period ratio f1/ ...

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