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Browsing by Author "Narayanan, R. S"

Browsing by Author "Narayanan, R. S"

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  • Correlation between magnetic shear and magnetic tension in a solar active region 
    Venkatakrishnan, P; Narayanan, R. S; Prasad, N. D. N (Kluwer Academic Publishers, 1993-04)
    The difference between the magnetic tension and magnetic shear was calculated for four vector magnetograms of NOAA AR 4474. It was seen that this difference between the two independent angular measures of magnetic stress ...
  • Expedition to Mauritius for observing supernova 1987A 
    Babu, G. S. D; Bhatnagar, A. K; Narayanan, R. S (Astronomical Society of India, 1991)
    A two-member expedition to the island country of Mauritius was organized in February/March 1988 to observe the supernova 1987A photometrically. The only occasion when one complete set of observations of SN 1987A could be ...
  • The Kodaikanal solar vector magnetograph - Laboratory evaluation of the polarimeter 
    Venkatakrishnan, P; Narayanan, R. S (Astronomical Society of India, 1991)
    Laboratory experiments performance to evaluate the sensitivity of the polarimeter of the Kodaikanal vector magnetograph. The polarimeter does not produce significant cross talk and has a sensitivity of about 1 percent polarization
  • A personal-computer-based imaging Stokes polarimeter for solar observations 
    Ananth, A. V; Venkatakrishnan, P; Narayanan, R. S; Bhattacharyya, J. C (Springer, 1994-05)
    For measurements of vector magnetic field over solar active regions, a Stokes polarimeter for studying the polarization profiles on selected spectral lines is described. This paper gives details of the relevant charged ...

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