Archival Collections: Recent submissions

  • Separate Results of Observations made with the Madras Meridian Circle in the year 1863 
    Pogson, N. R (Government Observatory, Madras, 1887)
  • Mean Positions of Stars observed with the Madras Meridian Circle in the year 1862 
    Pogson, N. R (Government Observatory, Madras, 1887)
  • Separate Results of Observations made with the Madras Meridian Circle in the year 1862 
    Pogson, N. R (Government Observatory, Madras, 1887)
  • Madras Observatory 
    Vagiswari, A; Birdie, C; Kameswara Rao, N (IIA Archives, 2006)
    Norman Robert Pogson was born at Nottingham, England on March 23, 1829. From an early age he showed great interest in astronomy. He was appointed as an astronomer in 1851 at the Bishops Observatory. He soon shifted to ...
  • Results of prominence obervations 
    Evershed, John; Evershed, M. A (Kodaikanal Observatory, Kodaikanal, 1917)
  • The spectrum of Sunspots 
    Evershed, John (Kodikanal Observatory, Kodaikanal, 1909)
  • The Microprocessor control of the Kavalur 234-cm optical telescope 
    Chinnappan, V; Bhattacharyya, J. C (Astronomical Society of India, 1985-06)
    This paper gives an introduction to the control system of the 234-cm optical telescope. The computer used in control is based on an INTEL 16 bit microprocessor. The VAX 11/780 system has a supervisory role in the control ...
  • Ca II K Emission in Canopus 
    Bappu, M. K. V; Mekkaden, M. V; Kameswara Rao, N (Astronomical Society of India, 1984-06)
    The Changes in the Ca II K line profile of the F0 supergiant Canopus have been studied from the high dispersion coude spectrograms obtained since 1975. The emission in the core of the line is variable in a timescale of few ...
  • Total Solar Eclipse of 1980 
    Bhattacharyya, J. C (Astronomical Society of India, 1978-03)
  • Discovery of a New Satellite of Uranus 
    Bhattacharyya, J. C; Kuppuswamy, K (Astronomical Society of India, 1977-03)
  • Future Trends in Stellar Spectroscopy 
    Bappu, M. K. V (Astronomical Society of India, 1974-03)
  • Fifteenth General Assembly of the I. A. U. 
    Bhattacharyya, J. C (Astronomical Society of India, 1973-09)
  • A Single-Cell Photopolarimeter 
    Jain, S. K; Bhattacharyya, J. C (Indian Institute of Astrophysics, Bangalore, 1987-02)
    A simple, single-cell photopolarimeter has been developed for use at the cassegrain focus of the 102 cm Ritchey-Chretien reflector at Kavalur. The design and performance of the instrument are discussed
  • Atmospheric Extinction at Kavalur Observatory during 1980-85 
    Shylaja, B. S; Bhattacharyya, J. C (Indian Institute of Astrophysics, Bangalore, 1986)
    From a series of photoelectric scanner observations during 1980-85, the atmospheric extinction at Kavalur has been analysed. The variation of this appears to follow lamda/sup-4/ law. There is a general increase in the ...
  • Line Profiles in an Expanding Spherical Medium 
    Peraiah, A; Srinivasa Rao, M; Varghese, B. A (Indian Institute of Astrophysics, Bangalore, 1986)
    We have applied the discrete space theory of radiative with the integral operator technique to calculate the spectral line profiles formed in a spherically symmetric expanding stellar atmospheres. We calculated the source ...
  • Relativistic effects on Radiative Transfer Equation: Order of Magnitude study 
    Peraiah, A (Indian Institute of Astrophysics, Banglore, 1986-05)
    We have analyzed how the high gas velocities which are observed in the objects such as the atmospheres of supergiant stars, novae, supernovae, accretion discs around high density objects (like black holes, neutron stars ...
  • Integral Operator Technique of Line Transfer 
    Peraiah, A (Indian Institute of Astrophysics, Bangalore, 1986-05)
    We present details of a new technique of obtaining a numerical solution of the radiative transfer equation in spherical symmetry in a polychromatic system. We employed the integral operators together with an interpolation ...
  • Discretization of the equation of Radiative Transfer with Compton Scattering 
    Peraiah, A (Indian Institute of Astrophysics, Bangalore, 1986-05)
    We have attempted to solve the equation of radiative transfer by including Compton and inverse Compton scattering. We expanded the specific intensity by Taylor series at about v/sup1/ = v/sub0/. The resulting equation has ...
  • P Cygni type profiles 
    Peraiah, A; Srinivasa Rao, M (Indian Institute of Astrophysics, Bangalore, 1985-11)
    We have presented a series of P Cygni type profiles of special lines computed by employing different velocity laws of expansion in a spherically atmosphere. A comparison has been made with those of Beals classification. ...
  • A Computer Controlled Microdensitometer 
    Ananth, A. V (Indian Institute of Astrophysics, Bangalore, 1985-11)
    The paper describes an interface as well as appliaction program developed for logging of digital data from a Carl Zeiss Microdensitometer on the TDC-316 Computer. This has been developed to meet certain requirements of ...

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