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| Paper: |
Phase Diversity Applied to Sunspot Observations |
| Volume: |
118, First Advances in Solar Physics Euroconference: Advances in the Physics of Sunspots |
| Page: |
170 |
| Authors: |
Tritschler, A.; Schmidt, W.; Knolker, M. |
| Abstract: |
We present preliminary results of a multi-colour phase diversity experiment carried out with the Multichannel Filter System of the Vacuum Tower Telescope at the Observatorio del Teide on Tenerife. We apply phase-diversity imaging to a time sequence of sunspot filtergrams taken in three continuum bands and correct the seeing influence for each image. A newly developed phase diversity device allowing for the projection of both the focused and the defocused image onto a single CCD chip was used in one of the wavelength channels. With the information about the wavefront obtained by the image reconstruction algorithm the restoration of the other two bands can be performed as well. The processed and restored data set will then be used to derive the temperature and proper motion of the umbral dots. Data analysis is still under way, and final results will be given in a forthcoming article. |
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