An optimal extraction algorithm for CCD spectroscopy

1986/06/01 by K. Horne · 36 citations
Engineering · Physics and Astronomy · Chemistry · #CCD and CMOS Imaging Sensors #Stellar, planetary, and galactic studies #Spectroscopy and Laser Applications

paper · pdf · doi:10.1086/131801

Abstract

An optimal spectrum extraction procedure is described, and examples of its performance with CCD data are presented. The algorithm delivers the maximum possible signal-to-noise ratio while preserving spectrophotometric accuracy. The effects of moderate geometric distortion and of cosmic-ray hits on the spectrum are automatically accounted for. In tests with background-noise limited CCD spectra, optimal extraction offers a 70-percent gain in effective exposure time in comparison with conventional extraction procedures.

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