High-Resolution Imaging of the Solar Photosphere Using Simultaneous G-Band and Continuum Observations

Details High-Resolution Imaging of the Solar Photosphere Using Simultaneous G-Band and Continuum Observations High-Resolution Imaging of the Solar Photosphere Using Simultaneous G-Band and Continuum Observations

May 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aas...200.3801v&link_type=abstract

American Astronomical Society, 200th AAS Meeting, #38.01; Bulletin of the American Astronomical Society, Vol. 34, p.698

Astronomy and Astrophysics

Astronomy

Scientific paper

Imaging of the Sun with ground-based telescopes requires accurate correction for the effects of turbulence in the Earth's atmosphere (``seeing"). An observed solar image is a convolution of a true solar image with a point spread function (PSF) describing the seeing effects. We present a new method for image reconstruction that uses pairs of images taken at two nearby wavelengths (G-band, 430.5 nm, and nearby continuum, 450.8 nm). Each image pair is taken strictly simultaneously, so that the two images are affected by the same PSF. A burst of 21 such image pairs is taken within a few seconds; the sun does not change much during this time, but the seeing varies randomly from one pair to the next. We determine the true solar images (and 21 PSFs) by iterative deconvolution. The method is applied to measurements obtained at the Dunn Solar Telescope (NSO/Sacramento Peak) on November 2, 2001. Preliminary results from the analysis of these data are presented. This work is supported by a grant from the National Science Foundation.

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