In this paper we present the testing of a back-illuminated development Euclid Visible Instrument (VIS) Charge-Coupled Device (CCD) to measure the intrinsic CCD Point Spread Function (PSF) characteristics using a novel modelling technique. We model the optical spot projection system and the CCD273-84 PSF jointly. We fit a model using Bayesian posterior probability density function, sampling to all available data simultaneously. The generative model fitting is shown, using simulated data, to allow good parameter estimations even when these data are not well sampled. Using available spot data we characterise a CCD273-84 PSF as a function of wavelength and intensity. The CCD PSF kernel size was found to increase with increasing intensity and decreasing wavelength.
@article{arxiv.1412.5382,
title = {Measuring a Charge-Coupled Device Point Spread Function: Euclid Visible Instrument CCD273-84 PSF Performance},
author = {Sami-Matias Niemi and Mark Cropper and Magdalena Szafraniec and Thomas Kitching},
journal= {arXiv preprint arXiv:1412.5382},
year = {2015}
}
Comments
Accepted for publication in Experimental Astronomy. Comments are welcome