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Browsing Kodaikanal Observatory Bulletins (1905 - 1997 ) by Title

Browsing Kodaikanal Observatory Bulletins (1905 - 1997 ) by Title

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  • MAGSAT and Geodynamo 
    Singh, B. P (Indian Institute of Astrophysics, Bangalore, 1988)
    Accurate, uniform and global vector magnetic field data obtained by MAGSAT provided a high resolution model of the earth’s magnetic field. It became possible to separate the core and crustal parts in spherical harmonic ...
  • Measured Higher IR Irradiance on Solar Eclipse day 
    Lal, M; Bose, S; Ghosh, A. B (Indian Institute of Astrophysics, Bangalore, 1997)
    Direct solar irradiance between 1200 and 1700 nm have been measured using ground-based IR spectroradiometer during October 24, 1995, solar eclipse over Delhi (28.7 degree N, 77.2 degree E, 220 MSL), India. The irradiance ...
  • Measurement of Solar Magnetic Fields 
    Bhattacharyya, J. C; Balasubramaniam, K. S (Indian Institute of Astrophysics, Bangalore, 1986)
    The paper reviews several methods of estimation of solar magnetic fields so far employed. The possibility of measurement of the vector magnetic fields by using two dimensional detector arrays is discussed. A program for ...
  • Measurement of Water Vapour over Delhi during the Solar Eclipse - 1995 
    Bose, S; Lal, M; Ghosh, A. B (Indian Institute of Astrophysics, Bangalore, 1997)
    Ground-based IR spectroradiometer has been used for the measurements of water vapour over Delhi (28.7N, 77.2E, 220MSL) during October 24, 1995 solar eclipse. Water vapour variation has been measured during solar eclipse ...
  • Microwave Propagation and Troposphere: Eclipse Time Observation 
    Mishra, U; Sen, S; Sharma, S; Barbara, A. K; Devi, M (Indian Institute of Astrophysics, Bangalore, 1997)
    The effect of 24th October 1995 solar eclipse were studied on the reception of Latikor-Shillong and Nongpiur-Shillong links both operating at a frequency of 11GHz. The surface temperature, pressure and humidity were ...
  • A Model of the Generation Mechanism of Type II Solar Radio Bursts 
    Thejappa, G (Indian Institute of Astrophysics, Bangalore, 1986)
    The proposed model for the generation mechanism of type II solar radio bursts is based on the fact that a small fraction of ions is reflected from the shock front and tend to evolve into a 'ring' in the downstream region ...
  • Modelling of Plasma Structures in the Solar Atmosphere 
    Krishan, V (Indian Institute of Astrophysics, Bangalore, 1984)
    A maximal helicity principle is proposed to study the stability of plasma structures in the solar atmosphere. This principle derives from the statistical treatment of the magnetohydrodynamical turbulence. The steady state ...
  • Modelling of Solar Coronal Oscillations 
    Krishan, V (Indian Institute of Astrophysics, Bangalore, 1997)
    The study of coronal osciallations is important since these oscillations could be responsible for the heating of the solar corona. Coronal structures are ex[ected to undergo three types of oscillations - non-compressional ...
  • Motion of a particle in the background of a white hole 
    Kapoor, R. C (Indian Institute of Astrophysics, 1979-11)
    A study has been made of the motion of a test particle in the background of a white hole particularly from the view point of its visibility to an observer at infinity. It is shown that radial as well as non-radial photons ...
  • Multifrequency Vertical Incidence (A-1 Method) Absorption Measurements at Ahmedabad during Total Solar Eclipse October 1995 
    Lele, P. D; Jani, K. G; Patel, A. P (Indian Institute of Astrophysics, Bangalore, 1997)
    A vertical incidence multifrequency absorption experiment was conducted on 2.2, 2.5 and 2.8 MHz at Ahmedabad during TSE Oct. 24, 1995. From start of Eclipse a wave like structure starts and grows to maximum amplitude ...
  • Multipole structure of the heliomagnetic field and northsouth asymmetry in the heliospheric current sheet 
    Girish, T. E; Prabhakaran Nayar, S. R (Indian Institute of Astrophysics, Bangalore, 1988)
    North-South asymmetry in the heliospheric current sheet (HCS) defined as the difference in the maximum helioatitudinal extension of the HCS in the northern and southern heliospheres, can be classified into two different ...
  • Narrow Band Photometry in Emission Lines during the Total Solar Eclipse of October 24, 1995 
    Singh, J; Cowsik, R; Venkatakrishnan, P; Srinivasan, R; Chinnappan, V; Raju, K. P; Srikanth, R (Indian Institute of Astrophysics, Bangalore, 1997)
    To investigate the spatial variation of tempereture and density within coronal strucures, narrow band photometry in three coronal emission lines was done during this eclipse. The emission lines 6374 (FeX), 7892 (Fe XI) and ...
  • NCSTC programme on total solar eclipse 1995 
    Kamble, V. B (Indian Institute of Astrophysics, Bangalore, 1997)
    NCSTC and Vigyan Prasar jointly undertook a country wide programme on S & T popularization built around the total solar eclipse (TSE) of October 24, 1995. The main objective of the program was to polarize astronomy in ...
  • The Near Infrared Spectra of Wolf Rayet Stars 
    Bappu, M. K. V; Ganesh, K. S; Scaria, K. K (Indian Institute of Astrophysics, Bangalore, 1977)
    The near infrared spectra of three Wolf-Rayet stars of the carbon sequence and five of the nitrogen sequence have been studied. Wavelength identifications and intensity scans are presented to show the emission line ...
  • Neutrinos from SN 1987A 
    Sivaram, C (Indian Institute of Astrophysics, 1988)
  • New Instrumentation efforts in Solar studies 
    Bhattacharyya, J. C (Indian Institute of Astrophysics, Bangalore, 1988)
  • A new interpretation of the general displacement of the lines of the solar spectrum towards the red 
    Evershed, John (Indian Institute of Astrophysics, Bangalore, 1913-12-10)
  • New measures of radial motion in sunspots 
    Evershed, John (Indian Institute of Astrophysics, Bangalore, 1916-06-27)
  • A new method of measuring small displacements of spectrum liness 
    Evershed, John (Indian Institute of Astrophysics, Bangalore, 1913-07-29)
  • A new technique to study the variability of the Sun 
    Singh, J (Indian Institute of Astrophysics, Bangalore, 1988)
    A method has been developed to take the high resolution spectra in ionized calcium K line at different latitudes and integrated over visible 180/sup0/ longitude. These spectra have been analysed to study the variability ...

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