Journal
EXPERIMENTAL ASTRONOMY
Volume 39, Issue 2, Pages 207-231Publisher
SPRINGER
DOI: 10.1007/s10686-015-9440-7
Keywords
Astronomy; Instrumentation; CCD; PSF; Spot projection; Euclid
Categories
Funding
- Euclid Consortium
- European Space Agency
- STFC [ST/K000977/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/K000977/1] Funding Source: researchfish
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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.
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