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Optimal Extraction with Sub-sampled Line-Spread FunctionsSTIS long-slit medium resolution spectra reduced in CALSTIS extended-source mode with narrow extraction heights (GWIDTH=3 pixels) show photometric uncertainties of +/- 3% relative to point-source extractions. These uncertainties are introduced through interpolation in the spectral image rectification processing stage, and are correlated with the number of pixel crossings the spectral profile core encounters in the spatial direction. The line-spread-function may be determined as a function of pixel crossing- position from calibration data sub-sampled in the spatial direction. This line spread function will be applied to science data to perform optimal extractions and point- source de-blending. Wavelength and breathing effects will be studied. Viability of the method to de-convolve extended source 'blobs' will be investigated.
Document ID
20030032467
Acquisition Source
Goddard Space Flight Center
Document Type
Preprint (Draft being sent to journal)
Authors
Collins, Nicholas R. (Science Systems and Applications, Inc. Lanham, MD, United States)
Gull, Theodore (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Bowers, Chuck (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Lindler, Don (Sigma Space Corp. Lanham, MD, United States)
Date Acquired
September 8, 2013
Publication Date
January 1, 2002
Subject Category
Life Sciences (General)
Meeting Information
Meeting: Hubble Space Telescope Workshop
Location: Baltimore, MD
Country: United States
Start Date: October 17, 2002
End Date: October 18, 2002
Distribution Limits
Public
Copyright
Public Use Permitted.
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