Professor Richard Massey r.j.massey@durham.ac.uk
Professor
An improved model of charge transfer inefficiency and correction algorithm for the Hubble Space Telescope
Massey, R.; Schrabback, T.; Cordes, O.; Marggraf, O.; Israel, H.; Miller, L.; Hall, D.; Cropper, M.; Prod'homme, T.; Matias Niemi, S.
Authors
T. Schrabback
O. Cordes
O. Marggraf
H. Israel
L. Miller
D. Hall
M. Cropper
T. Prod'homme
S. Matias Niemi
Abstract
Charge-coupled device (CCD) detectors, widely used to obtain digital imaging, can be damaged by high energy radiation. Degraded images appear blurred, because of an effect known as Charge Transfer Inefficiency (CTI), which trails bright objects as the image is read out. It is often possible to correct most of the trailing during post-processing, by moving flux back to where it belongs. We compare several popular algorithms for this: quantifying the effect of their physical assumptions and tradeoffs between speed and accuracy. We combine their best elements to construct a more accurate model of damaged CCDs in the Hubble Space Telescope's Advanced Camera for Surveys/Wide Field Channel, and update it using data up to early 2013. Our algorithm now corrects 98 per cent of CTI trailing in science exposures, a substantial improvement over previous work. Further progress will be fundamentally limited by the presence of read noise. Read noise is added after charge transfer so does not get trailed – but it is incorrectly untrailed during post-processing.
Citation
Massey, R., Schrabback, T., Cordes, O., Marggraf, O., Israel, H., Miller, L., …Matias Niemi, S. (2014). An improved model of charge transfer inefficiency and correction algorithm for the Hubble Space Telescope. Monthly Notices of the Royal Astronomical Society, 439(1), 887-907. https://doi.org/10.1093/mnras/stu012
Journal Article Type | Article |
---|---|
Publication Date | Mar 1, 2014 |
Deposit Date | Jun 30, 2014 |
Publicly Available Date | Aug 19, 2014 |
Journal | Monthly Notices of the Royal Astronomical Society |
Print ISSN | 0035-8711 |
Electronic ISSN | 1365-2966 |
Publisher | Royal Astronomical Society |
Peer Reviewed | Peer Reviewed |
Volume | 439 |
Issue | 1 |
Pages | 887-907 |
DOI | https://doi.org/10.1093/mnras/stu012 |
Keywords | Instrumentation: detectors, Methods: data analysis, Space vehicles: instruments. |
Files
Published Journal Article
(1.2 Mb)
PDF
Copyright Statement
This article has been accepted for publication in Monthly notices of the Royal Astronomical Society © 2014 The Authors Published by Oxford University Press on behalf of Royal Astronomical Society. All rights reserved.
You might also like
Scanning for dark matter subhaloes in Hubble Space Telescope imaging of 54 strong lenses
(2023)
Journal Article
Data Downloaded via Parachute from a NASA Super-Pressure Balloon
(2023)
Journal Article
A Recent Impact Origin of Saturn’s Rings and Mid-sized Moons
(2023)
Journal Article
RXJ0437+00: constraining dark matter with exotic gravitational lenses
(2023)
Journal Article
Downloadable Citations
About Durham Research Online (DRO)
Administrator e-mail: dro.admin@durham.ac.uk
This application uses the following open-source libraries:
SheetJS Community Edition
Apache License Version 2.0 (http://www.apache.org/licenses/)
PDF.js
Apache License Version 2.0 (http://www.apache.org/licenses/)
Font Awesome
SIL OFL 1.1 (http://scripts.sil.org/OFL)
MIT License (http://opensource.org/licenses/mit-license.html)
CC BY 3.0 ( http://creativecommons.org/licenses/by/3.0/)
Powered by Worktribe © 2024
Advanced Search