High fidelity point-spread function retrieval in the presence of electrostatic, hysteretic pixel response

Andrew Rasmussen; Augustin Guyonnet; Craig Lage; Pierre Antilogus; Pierre Astier; Peter Doherty; Kirk Gilmore; Ivan Kotov; Robert Lupton; Andrei Nomerotski; Paul O'Connor; Christopher Stubbs; Anthony Tyson; Christopher Walter

doi:10.1117/12.2234482

1 August 2016 High fidelity point-spread function retrieval in the presence of electrostatic, hysteretic pixel response

Andrew Rasmussen, Augustin Guyonnet, Craig Lage, Pierre Antilogus, Pierre Astier, Peter Doherty, Kirk Gilmore, Ivan Kotov, Robert Lupton, Andrei Nomerotski, Paul O'Connor, Christopher Stubbs, Anthony Tyson, Christopher Walter

Author Affiliations +

Proceedings Volume 9915, High Energy, Optical, and Infrared Detectors for Astronomy VII; 99151A (2016) https://doi.org/10.1117/12.2234482
Event: SPIE Astronomical Telescopes + Instrumentation, 2016, Edinburgh, United Kingdom

Abstract

We employ electrostatic conversion drift calculations to match CCD pixel signal covariances observed in at field exposures acquired using candidate sensor devices for the LSST Camera.^{1, 2} We thus constrain pixel geometry distortions present at the end of integration, based on signal images recorded. We use available data from several operational voltage parameter settings to validate our understanding. Our primary goal is to optimize flux point spread function (FPSF) estimation quantitatively, and thereby minimize sensor-induced errors which may limit performance in precision astronomy applications. We consider alternative compensation scenarios that will take maximum advantage of our understanding of this underlying mechanism in data processing pipelines currently under development. To quantitatively capture the pixel response in high-contrast/high dynamic range operational extrema, we propose herein some straightforward laboratory tests that involve altering the time order of source illumination on sensors, within individual test exposures. Hence the word hysteretic in the title of this paper.

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Andrew Rasmussen, Augustin Guyonnet, Craig Lage, Pierre Antilogus, Pierre Astier, Peter Doherty, Kirk Gilmore, Ivan Kotov, Robert Lupton, Andrei Nomerotski, Paul O'Connor, Christopher Stubbs, Anthony Tyson, and Christopher Walter "High fidelity point-spread function retrieval in the presence of electrostatic, hysteretic pixel response", Proc. SPIE 9915, High Energy, Optical, and Infrared Detectors for Astronomy VII, 99151A (1 August 2016); https://doi.org/10.1117/12.2234482

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