Faint-object, absorption-line spectroscopy with the improved CTIO SIT vidicon

Details Faint-object, absorption-line spectroscopy with the improved CTIO SIT vidicon Faint-object, absorption-line spectroscopy with the improved CTIO SIT vidicon

Feb 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981pasp...93..139h&link_type=abstract

Astronomical Society of the Pacific, Publications, vol. 93, Feb.-Mar. 1981, p. 139-143. Research supported by the Natural Scien

Computer Science

Performance

12

Absorption Spectroscopy, Astronomical Spectroscopy, Faint Objects, Stellar Spectra, Vidicons, Cameras, Error Analysis, Giant Stars, Globular Clusters, Line Spectra, Radial Velocity, Spectral Resolution, Stellar Magnitude

Scientific paper

Experiences with CTIO's SIT vidicon system are briefly described. It is noted that with a simple reduction procedure, spectra at approximately 60 A/mm of 18th-19th magnitude stars and distant globular clusters yield radial velocities of approximately 25 km/sec mean error. While there are reasons to suspect that the ultimate errors for the system could be quite a bit smaller, the present performance is sufficient to demonstrate the association of high-velocity objects crucial to many stellar and nearby extragalactic problems. Sample spectra are given for faint stars in Omega Cen and Graham and Phillips' globular cluster near NGC 5128.

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