Machine measurements of the objective-prism spectra of faint galaxies. I - Plate measurements and initial data reduction. II - Interactive redshift measurements

Details Machine measurements of the objective-prism spectra of faint galaxies. I - Plate measurements and initial data reduction. II - Interactive redshift measurements Machine measurements of the objective-prism spectra of faint galaxies. I - Plate measurements and initial data reduction. II - Interactive redshift measurements

Mar 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986mnras.219..241c&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 219, March 15, 1986, p. 241-249, 251-271.

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10

Astronomical Photography, Astronomical Spectroscopy, Data Reduction, Galaxies, Microdensitometers, Photographic Plates, Calibrating, Data Storage, Image Analysis, Image Processing, Red Shift, Spectrum Analysis

Scientific paper

A high-speed microdensitometer known as COSMOS, which is capable of measuring UK Schmidt Telescope (UKST) objective-prism plates, is described. Emphasis is placed on its ability to extract digitized spectra. It is noted that COSMOS meets measuring machine requirements in that it can measure entire spectra at a resolution such that pixel-by-pixel intensity conversion can be performed before any averaging or summation. Parameterized data obtained by COSMOS is processed via a system known as HAGGIS, which is instrumental in both the detection and selection of images. Applications of these software-extracted spectra include the automated detection of quasars and the classification of stellar spectra.

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