Photometrical analysis of the June 30, 1973 solar corona

Details Photometrical analysis of the June 30, 1973 solar corona Photometrical analysis of the June 30, 1973 solar corona

Sep 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978a%26a....69...35k&link_type=abstract

Astronomy and Astrophysics, vol. 69, no. 1, Sept. 1978, p. 35-42.

Astronomy and Astrophysics

Astrophysics

18

Astronomical Photography, Astronomical Photometry, Solar Corona, Solar Eclipses, Calibrating, Data Reduction, Luminous Intensity, Polarization Characteristics, Reference Stars

Scientific paper

In order to deduce reliable values of the K and F coronal, a method of photographic photometry has been applied to study compensated high-resolution pictures obtained during the June 30, 1973, solar total eclipse, including a color one. The correctly exposed images of calibration stars are used to obtain intensities in units of the mean brightness of the sun. An account is made, in both the blue and the red spectral ranges, for the sky background as well as for the coronal aureola effects. The N-polar and E-equatorial regions are shown to be relatively homogeneous; their intensities are especially studied in the radial direction and compared with published values of the K and F coronae. No flattening and no color effect are found in the inner part (distance less than 2.5 solar radii) of the F corona.

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