A treatment for background correction on the Hamilton Echelle Spectrograph

Details A treatment for background correction on the Hamilton Echelle Spectrograph A treatment for background correction on the Hamilton Echelle Spectrograph

Feb 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995pasp..107..193c&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 107, no. 708, p. 193-198

Astronomy and Astrophysics

Astronomy

9

Echelle Gratings, Illuminating, Image Analysis, Light Scattering, Spectrographs, Background Radiation, Correction, Mathematical Models

Scientific paper

A method for background-illumination correction for the Hamilton Echelle Spectrograph is presented. The background is parametrized as (1) a global two-dimensional polynomial of scattered light, and (2) a local contamination of spectral features from adjacent orders modeled as a power law in the cross dispersion. The latter component corrects the overlap of closely packed adjacent orders. The significance of the local component is verified by statistical tests and interorder inspection. A software tool useful with the Image Reduction Analysis Facility has been made publicly available.

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