A fast, reliable spectral rectification technique

Details A fast, reliable spectral rectification technique A fast, reliable spectral rectification technique

Jul 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985pasp...97..605l&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 97, July 1985, p. 605-608. Research supported by Dartmo

Other

10

Astronomical Spectroscopy, Automatic Control, Classifications, Data Reduction, Spectrum Analysis, Stellar Spectra, Calibrating, Cross Correlation, Fourier Transformation

Scientific paper

A fast, reliable method of spectral rectification, division of the spectrum by the spectrum itself after it has been put through a very low pass filter, is demonstrated. It is shown that this technique is superior to the other Fourier technique now in use (simple removal of the low-frequency components) for use in automatic spectral classification. The method has been used successsively at all dispersions currently available with the Mark II scanner. It fails catastrophically, however, with very late (M1 and later) type stars and sometimes on extreme emission line objects. Since the spectrum need not be wavelength calibrated, the method should be applicable to objective-prism spectra, galaxy redshift surveys, and analyses such as the radial-velocity work of Fehrenbach and Burnage (1978).

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