2019/11/21 by Craig Lage, Lage, Craig
Computer Science · Engineering · #Astronomical Observations and Instrumentation #CCD and CMOS Imaging Sensors #FOS: Physical sciences #Instrumentation and Methods for Astrophysics (astro-ph.IM) #Sensor Technology and Measurement Systems
paper · pdf · doi:10.48550/arxiv.1911.09567
openalex publication_date 2019/11/21 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The Brighter-Fatter (hereafter BF) effect in CCD sensors causes increases in the image size of bright objects due to electrostatic repulsion of collected charges. Correcting this effect in the LSST camera is required in order to meet the science goals of the project, especially galaxy shape measurements for weak lensing. The current plan for BF image correction in the LSST is to use the deconvolution method described in Coulton, et.al. [1]. In this work, we study the linearity of the BF effect and effectiveness of the Coulton correction, using both simulation tools and measurements made on prototype LSST CCDs from both CCD vendors. We conclude that the proposed image correction method may be adequate to meet the LSST science goals, although more work is needed on the algorithms used to generate the image correction kernel from sensor measurements.