Bibcode
Collados, M.; Vazquez, M.
Bibliographical reference
Astronomy and Astrophysics (ISSN 0004-6361), vol. 180, no. 1-2, June 1987, p. 223-228.
Advertised on:
6
1987
Citations
35
Refereed citations
31
Description
The contrast of the photospheric granulation in the centre of the disk
at a wavelength of 500 nm has been determined by means of photographs
taken during the solar eclipse of May 30th 1984. After
restoration, values of 17.3% and 20.4%, using the sum of two lorentzians
to define the instrumental profile, and of 11.7% and 14.3%, using the
sum of two gaussians, have been obtained. This suggests that the results
are quite sensitive to the particular choice which is made of the
analytical approximation to the point spread function. The corrected
power spectrum does not show significant differences to those of
previous works. A comparison between the method for correcting the image
degradation which the authors propose with those used by other
investigators is also made.