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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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  • Active mirror alignment control system for the MACE telescope 
    Kulgod, S. V; Pious, L; Chadda, V. K; Kaul, S. R; Yadav, K. K.; Koul, R (Astronomical Society of India, 2002)
    The conceptual design of an active mirror contol system for the MACE telescope, being set up by the Bhabha Atomic Research Centre at Mt. Abu, is described. Preliminary results obtained from recent laboratory trials are ...
  • Additional note on the measurement of lunar mountains 
    Ghosh, S. C (Astronomical Society of India, 1912-04)
  • Adiabatic cooling and nonthermal spectrum of blazars 
    Sahayanathan, S; Bhattacharyya, S; Kaul, C. L; Bhat, C. L (Astronomical Society of India, 2001)
    Here we study the effect of adiabatic cooling on the non-thermal synchrotron spectra of blazars from radio to X-ray region resulting when blazars are in the flaring state.
  • Advanced mergers of galaxies: luminosity profiles and dynamics 
    Jog, C. J (Astronomical Society of India, 2005-06)
    We have analyzed the near-IR Ks-band data from the 2MASS archival database for a large sample of twenty-seven galaxies that show signs of interaction but have a single nucleus. Surprisingly, half of these advanced mergers ...
  • Advective flow paradigm of disks and outflows around black holes 
    Chakrabarti, S. K (Astronomical Society of India, 2002)
    For the past fifty years, accretion process is being studied initially on normal stars and later, on compact object, such as black holes and neutron stars. In this Review, I present the modern development of this subject ...
  • The age distribution of open clusters as a function of Trumpler's classification 
    Bhatt, B. C; Pandey, A. K; Mahra, H. S (Astronomical Society of Indian, 1989-03)
    The age distribution of open clusters is studied as a function of Trumpler's central concentration and range in brightness classes. For different Trumpler's classes within 1 kpc, it is shown that the observed distribution ...
  • Analysis of Ly α absorption lines in the vicinity of QSOs 
    Khare, P (Astronomical Society of India, 1996)
    Recent evidence suggesting that at least some of the Lyman alpha forest absorbers are not primordial and are indeed associated with galaxies is disucussed. Proximity effect, which deals with the change in the distribution ...
  • An Analysis of Proper Motion and Membership Probability in Open Clusters 
    Sagar, R (Astronomical Society of Indian, 1987-12)
    An analysis of the proper motion data and membership probability has been carried out for nine open clusters. The effects of observational errors on the parameters characterzing the frequency distributions of cluster and ...
  • Analysis of solar flare in CaII K on 1989 March 13 
    Joshi, A; Uddin, W (Astronomical Society of India, 1991)
    We report the CaII K observations of a major umbral solar flare of optical class 3B which occurred on 1989 March 13. Correlated optical, microwave, soft X-ray (SXR), sudden ionospheric disturbance observations and the ...
  • Analysis of the light variations of BS Aquarii 
    Kilambi, G. C (Astronomical Society of India, 1982-09)
    An analysis of UBV light variations of BS Aqr is presented. Intrinsic (U-B) and (B-V) values are used to derive the temperature and surface gravity. The mean values are Teff = 7600 + or - 100 K and log geff = 3.8 + or - ...
  • Analysis System for GRAPES-III Extensive Air Shower Data 
    John, A. V (Astronomical Society of India, 2003)
    GRAPES-III experiment [Tonwar S.C] consists of 271 scintillators of 1 m2. area each and a large area (560 m2) muon detector to record Extensive Air Showers (EAS) produced in the atmosphere by high energy cosmic rays (> 3 ...
  • Analytical studies of standing shocks in accretion flows around compact objects 
    Das, S (Astronomical Society of India, 2005-09)
    Shocks in advective flows around black holes have become es- sential ingredients in explaining wide variety of observed features. We first analytically study the properties of shocks in the special case when viscosity and ...
  • Analytical study of standing shocks around black hole 
    Das, S; Chakrabarti, S. K (Astronomical Society of India, 2002)
    Shocks from around black holes as the matter slows down by centifugal barrier. At the shocks, kinetic energy is converted into thermal energy and hard-X rays, outflows etc. are produced which are observed. We compute the ...
  • Angular resolution of Pachmarhi array of Cverenkov telescopes 
    Majumdar, P; Acharya, B. S; Bhat, P. N; Chitnis, V. R; Rahman, M. A; Singh, B. B; Vishwanath, P. R (Astronomical Society of India, 2002)
    Pachmarhi Array of Cverenkov Telescopes (PACT), consisting of a distributed array of 25 telescopes is used to sample the atmospheric Cverenkov Photon showers. The shower front is fitted to a plane and the direction of ...
  • Annual meeting 
    Lee, W. A (Astronomical Society of India, 1915)
  • Annual meeting 
    Demetrius, L., ed. (Astronomical Society of India, 1919)
  • Anomalous reddening law in the galactic giant H II region NGC 3603 
    Pandey, A. K; Ogura, K (Astronomical Society of India, 1998)
  • Another illustration of Einstein's theory 
    Deighton, Thos. (Astronomical Society of India, 1918)
  • Antimatter in Cosmic Rays 
    Daniel, R. R; Stephens, S. A (Astronomical Society of India, 1980-06)
    We have briefly reviewed the available information on the antimatter content in the universe deduced from astronomical observations and examined some of the theories relating to symmetric cosmology, in order to understand ...
  • Antiquity of the vedic calendar 
    Abhyankar, K. D (Astronomical Society of India, 1998-03)
    Taking guidance from Vedanga jyotis, it is found that in ancient India the sacrificial year started near the winter solstice. As the position of the winter solstice retrogrades by 1 degree in about 71 years due to the ...

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