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Browsing by Author "Gosain, S"

Browsing by Author "Gosain, S"

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  • Magnetic and velocity fields over active regions 
    Gosain, S; Choudhary, D. B (Astronomical Society of India, 2002-09)
    In order to understand the nature of dynamics over an active region (AR) , it is necessary to study the velocity and magnetic fields simultaneously. We present the preliminary results from our analysis of spectropolari ...
  • A New Technique for Solar Imaging Spectro-polarimetry using Shack-Hartmann and Fabry-Perot 
    Gosain, S; Sankarasubramanian, K; Venkatakrishnan, P; Bayanna, A. R (Astronomical Society of the Pacific, 2012-12)
    A new technique for solar imaging spectro-polarimetry is presented. Using the combination of a Shack-Hartmann (SH) and a Fabry-Pérot (FP) interferometer, high-cadence spectroscopic observations can be obtained at discrete ...
  • Rapid disappearance of penumbra-like features near a flaring polarity inversion line: the hinode observations 
    Ravindra, B; Gosain, S (Hindawi Publishing Corporation, 2012-03)
    We present the observations of penumbra like features (PLFs) near a polarity inversion line (PIL) of flaring region. The PIL is located at the moat boundary of active region (NOAA 10960). The PLFs appear similar to sunspot ...
  • Three Dimensional Structure of Active Regions 
    Choudhary, D. P; Gosain, S (Astronomical Society of India, 2002-09)
    We present the preliminary results of the modeling of the three dimensional structure of the magnetic field above the aclive regions observed with Advanced Stokes polarimeter and Dick Dunn telescope at National ...
  • White Light and Emission Line Polarization of Solar Corona during TSE of June 21, 2001 
    Ambastha, A; Gosain, S (Astronomical Society of India, 2003)
    Coronal intensity and polarization maps have been obtained for the total solar eclipse (TSE) o o of June 21, 2001, observed from Lusaka, Zambia (location: 28 17.5E 15 24.5S, Alt. 1300 mtr) at broadband H 6563Å (FWHM 80Å), ...

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