An analytical approximation of the hubble space telescope monochromatic point spread functions |
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| Authors: | O. Bendinelli G. Parmeggiani F. Zavatti |
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| Affiliation: | (1) Dipartimento di Astronomia, Università di Bologna, Via Zamboni 33, 40126 Bologna, Italy;(2) Osservatorio Astronomico di Bologna, Via Zamboni 33, 40126 Bologna, Italy;(3) Dipartimento di Astronomia, Università di Bologna, Via Zamboni 33, 40126 Bologna, Italy |
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| Abstract: | A mixture of off-centred Gaussians is used to approximate the predicted monochromatic point spread functions (PSFs) of Hubble space telescope (HST) at long wavelengths, and also, with a reduced number of parameters, the wide-band PSFs. The usefulness of the approximation in simulation and analysis of HST data is shown by means of application to image centring and convolution-deconvolution problems. |
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| Keywords: | HST point spread function— image centring— image deconvolution |
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