An optimal extraction algorithm for CCD spectroscopy

Details An optimal extraction algorithm for CCD spectroscopy An optimal extraction algorithm for CCD spectroscopy

Jun 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986pasp...98..609h&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 98, June 1986, p. 609-617.

Statistics

954

Astronomical Spectroscopy, Charge Coupled Devices, Data Reduction, Spectrum Analysis, Image Processing, Iteration, Optimization, Spatial Resolution, Stellar Spectra, Variance (Statistics)

Scientific paper

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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