A fringe projector-based study of the Brighter-Fatter Effect in LSST CCDs

Journal Article · 07 September 2017 · Journal of Instrumentation

DOI: https://doi.org/10.1088/1748-0221/12/09/C09009 · OSTI ID:1399664

Gilbertson, W. ^[1]; Nomerotski, A. ^[2]; Takacs, P. ^[2]

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1. Univ. of Arkansas, Fayetteville, AR (United States). Dept. of Physics; Brookhaven National Lab. (BNL), Upton, NY (United States). Physics Dept.
2. Brookhaven National Lab. (BNL), Upton, NY (United States). Physics Dept.

In order to achieve the goals of the Large Synoptic Survey Telescope for Dark Energy science requires a detailed understanding of CCD sensor effects. One such sensor effect is the Point Spread Function (PSF) increasing with flux, alternatively called the `Brighter-Fatter Effect.' Here a novel approach was tested to perform the PSF measurements in the context of the Brighter-Fatter Effect employing a Michelson interferometer to project a sinusoidal fringe pattern onto the CCD. The Brighter-Fatter effect predicts that the fringe pattern should become asymmetric in the intensity pattern as the brighter peaks corresponding to a larger flux are smeared by a larger PSF. By fitting the data with a model that allows for a changing PSF, the strength of the Brighter-Fatter effect can be evaluated.

• Research Organization: Brookhaven National Laboratory (BNL), Upton, NY (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
• Grant/Contract Number: SC0012704
• OSTI ID: 1399664
• Report Number(s): BNL--114338-2017-JA
• Journal Information: Journal of Instrumentation, Journal Name: Journal of Instrumentation Journal Issue: 09 Vol. 12; ISSN 1748-0221
• Publisher: Institute of Physics (IOP)Copyright Statement
• Country of Publication: United States
• Language: English