Astronomy and Astrophysics – Astronomy
Scientific paper
May 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21813101a&link_type=abstract
American Astronomical Society, AAS Meeting #218, #131.01; Bulletin of the American Astronomical Society, Vol. 43, 2011
Astronomy and Astrophysics
Astronomy
Scientific paper
Cosmic rays are a known problem in infrared astronomy, causing both loss of data and data accuracy. The problem becomes even more extreme when considering data from a high radiation environment such as in orbit around Earth, or outside the Earth's magnetic field altogether, unprotected, as is the case for the James Webb Space Telescope. To find the best method to correct for this disturbance we study three cosmic ray detection methods: a 2-point difference method, a deviation from the fit method, and a y-intercept method. These methods are applied to simulated non-destructive read ramps with various slopes, number of frames, number of cosmic rays, and cosmic ray frame number and strength. We show that the 2-point difference method is the fastest, optimal detection method in the photon-dominated regime and the y-intercept method is the optimal detection method in the read noise-dominated regime.
Anderson Rachel E.
Gordon Karl Douglas
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