Bhattacharyya, J. C; Balakrishnan, T. K(Pergamon Press Ltd, 1967)
From the height variation of electron densities during a solar flare, ultra violet and X-ray contribution of ionization process has been estimated. The results thus obtained are in conformity with direct measurements of ...
Narayan, A. L; Ananthasubrahmanyam, C. K(Calcutta University Press, 1940-10)
The experimental errors inherent in photographic photometry are discussed and a direct reading spectrophotometer for the visible especially adapted to the study of line, contour and absorption and fluorescence spectra is ...
Giridhar, S; Bhattacharyya, J. C; Kutty, K. N(Tata Institute of Fundamental Research, 1988)
Need for application of Image processing techniques in astronomical studies in optical wavelengths and special advantages accruing thereby are discussed. The paper describes various image processing facilities that are ...
Gokhale, M. H(Indian Institute of Astrophysics, 1979-11)
From the topology of the two families of flux tubes in the shock-transition model of the solar cycle we predict the general nature of the differential rotation of: (i) sunspots and the small scale emission features in ...
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 ...
Giridhar, S; Bappu, M. K. V(Indian Institute of Astrophysics, 1978)
It is shown that the violet edges normally seen in Wolf-Rayet stars around 5800Å are principally due to displaced C IV absorption. The diffuse interstellar bands are seldom of comparable strength and can be seen separately ...
Gokhale, M. H(Indian Institute of Astrophysics, 1979-11)
Justification is given for comparing the consequences of the shock transition model of the solar magnetic cycle with important observed properties of the solar activity cycle without waiting for the basic postulates of the ...