Computer Science – Performance
Scientific paper
Sep 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981msngr..25....6i&link_type=abstract
The Messenger, No.25, P. 6, 1981
Computer Science
Performance
2
Scientific paper
CORA VEL is a spectrometer specialized for the determination of stellar radial velocities with very high time resolution and high accuracy. The first instrument has been operational since 1977 on the 1 m Swiss telescope at the Haute-Provence Observatory where nearly 20,000 radial velocity measurements have been made by astronomers from the Geneva and Marseille Observatories. Although a preliminary report on the prototype has been given by M. Mayor (THE MESSENGER No. 8, March 1977) it seems interesting to give further information about the instrument's performance: they are exceptional both for accuracy (0.5 km S-1 or better) as weil as for highspeed acquisition (measurements in less than 5 min.) and for sensitivity (Iimiting magnitude B > 13). The efficiency of this technique was so impressive that observing programmes in the southern hemisphere far beyond the limit of classical radial velocity spectrographs could be considered. Therefore a second CORA VEL has been installed at the Cassegrain focus of the 1.54 m Danish telescope at La Silla, and observations took place in January-February 1981. The results obtained during this period are quite I remarkable.
Imbert M.
Prevot L.
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