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Browsing by Author "Bhatnagar, A"

Browsing by Author "Bhatnagar, A"

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  • Temporal variations of solar p-mode frequencies on time scales of 27 days 
    Tripathy, S. C; Jain, K; Bhatnagar, A (Astronomical Society of India, 2002-09)
    We have studied variations in the frequencies of intermediate degree solar oscillation modes on a time cadence of 18 and 27 days. We report that the p-modes adjust to changes in the activity measures on time scales as ...
  • Total solar eclipse observations MiG-25 at 80,000 ft 
    Bhatnagar, A; Mukerji, S; Babu, Y. S; Sehgal, N. K; Kamble, V. B; Pandya, R. P; Pandya, N. P; Bhavsar, K. M; Prajapati, R. P (Indian Institute of Astrophysics, 1997)
    The objective of this project was to take intensity and polarization measurements of extended solar coronal streamers, from a height of 75,000 to 80,000 feet above the ground. Hitherto, no observations have been made of ...
  • U-shaped type II solar radio bursts associated with 1980 March 28 flare 
    Markeev, A. K; Formichev, V. V; Chertok, I. M; Bhatnagar, A; Jian, R. M; Shelke, R. N; Bhonsle, R. V (Astronomical Society of India, 1983-12)
    The observations of the 1980 March 28, 2B flare in optical, radio microwave and metric and x-ray wavelengths are presented. In the dynamic radio spectrum, unusual and rare U-shaped type II radio bursts associated with this ...
  • Variation in continuum brightness and equivalent widths of lines in sunspot penumbrae 
    Bhatnagar, A (Springer - Verlag, 1966)
    Variations in the continuum brightness and in the equivalent widths of lines have been observed in the sunspot penumbral spectra. Darker regions in the continuum of the penumbrae show widening of lines, while the brighter ...
  • Variations in Oscillation Frequencies From Minimum to Maximum of Solar Activity 
    Jain, K; Bhatnagar, A (Springer, 2003-04)
    The temporal variation in intermediate-degree-mode frequencies is analysed using helioseismic data which cover the minimum to the maximum phase of the current solar cycle. To study the variation in detail, the measured ...
  • A viewpoint on moderate size solar telescope 
    Bhatnagar, A (Astronomical Society of India, 1998)

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