Locating stars with a multiple-object spectrograph - ARGUS

Details Locating stars with a multiple-object spectrograph - ARGUS Locating stars with a multiple-object spectrograph - ARGUS

Oct 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990pasp..102.1208l&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 102, Oct. 1990, p. 1208-1216.

Astronomy and Astrophysics

Astronomy

11

Astronomical Coordinates, Spectrographs, Stellar Spectra, Charge Coupled Devices, Coordinate Transformations, Emission Spectra, Position (Location), Telescopes

Scientific paper

The methods used to locate stars with the Argus, a new multiple-object spectrometer, are described. A number of steps are required to translate user-supplied coordinates into provisional focal-plane positions which will allow the initial placement of the fibers. Advantage of the ability to move the robot probes simultaneously to search for each star in the vicinity of its provisional position is taken. In order for auto-centering to work effectively, it is necessary to develop a procedure for reading the spectrograph CCD rapidly, design a search procedure, and decide on a method of computing an improved position for each fiber. This paper describes how the provisional positions have been determined and how the auto-centering procedure has been implemented in Argus.

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