Enhancing IUE spectrophotometry: a case study of Beta Hydri.
Abstract
A technique for improved processing of data from the IUE satellite has been developed. A correlation scheme is used to directly measure the geometric displacement of the raw image, which enables the necessary geometric transformation to be carried out with subpixel accuracy. The resulting improvement in photometric calibration allows the subsequent data extraction to give spectra with significantly lower noise than with standard reduction methods. In an on-going search for chromospheric variability in the solar-type star β Hydri, nearly 100 IUE exposures have been reduced with the new method.
- Publication:
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Nordic-Baltic Astronomy Meeting
- Pub Date:
- 1990
- Bibcode:
- 1990nba..meet..181L
- Keywords:
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- Solar-Type Stars: UV Spectra;
- Methods of Reduction: UV Spectra;
- Solar-Type Stars: Stellar Activity