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Browsing Kodaikanal Observatory Bulletins (1905 - 1997 ) by Title

Browsing Kodaikanal Observatory Bulletins (1905 - 1997 ) by Title

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  • Anomalous Behaviour of 22.3 kHz NWC Signal during Total Solar Eclipse of October 24, 1995 
    De, B. K; Sarkar, S. K (Indian Institute of Astrophysics, Bangalore, 1997)
    The effect of total solar eclipse of October 24, 1995 on long distance VLF radio wave propagation of 22.3 kHz from North West Cape, Australia to Calcutta is being reported here. After the commencement of the total eclipse ...
  • Anomalous dispersion in the sun 
    Royds, T (Indian Institute of Astrophysics, Bangalore, 1915-10-29)
  • The apparent effect of planets on the distribution of prominences 
    Royds, T; Sitarama Ayyar, S (Indian Institute of Astrophysics, Bangalore, 1913-11-15)
  • Application of Spectroscopic Ellipsometry to Study the Effect of Annealing on Cadmium Sulphide Thin Films 
    Mathew, Sunny; Vijayakumar, K. P (Indian Institute of Astrophysics, Bangalore, 1991)
    Multiple angle spectroscopic ellipsometery (SE) has been used to study the variation in the layer structure due to annealing of CdS thin films prepared by spray pyrolysis technique. The samples were studied using visible ...
  • ASPEN Workshop on Supernova Physics 
    Ramadurai, S (Indian Institute of Astrophysics, 1988)
  • An Aspheric Grin Ray Trace Program for Thermal Analysis of Optical Systems 
    Sharma, D. K; Shyam, D; Sujatha, G (Indian Institute of Astrophysics, Bangalore, 1991)
    In this communication we describe a program which can ray trace through systems bounded by spherical/ aspheric surfaces together with the option to trace through media having graded index profile (GRIN) for one or more ...
  • The astronomical seeing at Kavalur. 
    Bappu, M. K. V; Mohin, S; Unnikrishnan, K. G (Indian Institute of Astrophysics, 1978)
    A summary of observing conditions at Kavalur Observatory is p0resented. These related to spectroscopic and photometric observations and to seeing as evaluated at the 102cm telescope. Nearly fifty percent of nights on which ...
  • Asymptotic Values of Some Scattering Parameters from Mie Theory 
    Shah, G. A (Indian Institute of Astrophysics, Bangalore, 1991)
    The scattering parameters such as extinction efficiency, albedo, asymmetry parameter, etc, have been studied on the basis of the Mie theory of scattering of electromagnetic radiation by a sphere as well as the classical ...
  • Atlas of H-Alpha Synoptic Charts for Solar Cycle 19 (1955 - 1964): Carrington Solar Rotations 1355 to 1486 
    Makarov, V. I; Sivaraman, K. R (Indian Institute of Astrophysics, Bangalore, 1986)
  • Atmospheric Characteristics at Trombay relating to the October 1995 Solar Eclipse 
    Sapra, B. K; Sunny, Faby; Kulkarni, P. B; Mahadevan, T. N; Pandit, G. G (Indian Institute of Astrophysics, Bangalore, 1997)
    A study was undertaken to examine the effect of a short-term reduction in the solar intensity on the characteristics of the atmospheric environment. Meteorological parameters, solar radiation variations, major pollutant ...
  • 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 ...
  • Automated Microdensitometer 
    Viswanath, C (Indian Institute of Astrophysics, Bangalore, 1980)
    An interface to a Carl Zeiss microdensitometer and the HCL's micro-computer MICRO 2200 has been built to digitize, log, and process the analog variable density information on photographic plates. The automated process ...
  • An Automated Spectrum Scanner 
    Bappu, M. K. V (Indian Institute of Astrophysics, Bangalore, 1977)
    A rapid-scan single channel spectrum in the Ebert-Fastie arrangement has been constructed and successfully used on the Kavalur 102-cm reflector. The special region 3000-11000 Armstrong is covered with appropriate dry-ice ...
  • Broad Band Photometry of Solar Corona during the Total Solar Eclipse of October 24, 1995 
    Bagare, S. P; Aleem, P. S. M; Singh, J; Saxena, A. K (Indian Institute of Astrophysics, Bangalore, 1997)
    A 30 cm coelostat, a red broad band filter, and a 15 cm objective providing an f/15 beam were used to obtain high resolution picture is recorded with its top around 2Ro, in the near north polar region. The nearest YOHKOH ...
  • Broad Band Photometry of the Solar Corona of 1983, June 11 
    Sivaraman, K. R; Singh, J; Kapoor, R. C; Kariyappa, R (Indian Institute of Astrophysics, Bangalore, 1985-11)
    The solar corona was photographed at an effective wavelength of 6300A during the total eclipse of 1983, June 11 at Indonesia. From the isophotes of the corona, the intensity distributions along the equator, poles, streamers ...
  • Ca II K Emission from the Solar Chromosphere 
    Sivaraman, K. R (Indian Institute of Astrophysics, Bangalore, 1986)
    The role of the Ca II K line as a reliable diagnostic of the chromospheric activity on the Sun is reviewed. The chromospheric structures seen in this line serve as good indicators of the photospheric magnetic structures ...
  • The cause of the so-called pole effect in the electric arc 
    Royds, T (Indian Institute of Astrophysics, Bangalore, 1916-12-02)
  • CCD Observations of the Total Solar Eclipse of October 24, 1995 
    Verma, V. K; Wahab Uddin; Gaur, V. P; Joshi, G. C; Bondal, K. R (Indian Institute of Astrophysics, Bangalore, 1997)
    The observations of the solar corona during the Total Solar Eclipse of October 24, 1995 were attempted in white light and in narrow band filters with peak wavelenghts centered at 5303 Armstrong (FeXIV) and at 6474 Armstrong ...
  • Colour photography of solar corona during the total solar eclipse of October 24, 1995 
    Gopalakrishna Reddy, M; Rama Rao, P. V. S; Krishna Rao, D. V (Indian Institute of Astrophysics, Bangalore, 1997)
    Very good color pictures of the solar corona of 24th October 1995 were taken by a team from Andra University, from Budge Budge, Calcutta. A total of 36 pictures recorded the various phases of the eclipse from the first to ...
  • Comoving frame calculations with Lorentz profiles in radially expanding media 
    Peraiah, A; Raghunath, G (Indian Institute of Astrophysics, 1979-11)
    A computationally simple method for solving the line transfer in comoving frame has been described for radially expanding spherical medium. We have assumed a radially increasing velocity distribution and a non-LTE (where ...

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