========================================================================== I/153 Lick Saturn-Voyager Reference Star Catalogue (Klemola+, 1979) The following files can be converted to FITS (extension .fit .fgz or .fiZ) catalog.dat ========================================================================== Query from: http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=I/153 ==========================================================================
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Beginning of ReadMe : I/153 Lick Saturn-Voyager Reference Star Catalogue (Klemola+, 1979) ================================================================================ Lick Saturn-Voyager Reference Star Catalogue Klemola A.R., Taraji H., Ocampo A. <Lick Observatory, University of California, Santa Cruz (1979)> ================================================================================ ADC_Keywords: Positional data; Regional catalog Abstract: The Lick Saturn-Voyager Reference Star Catalogue contains accurate equatorial coordinates for 4551 stars in a band of sky against which cameras of the Voyager spacecraft were pointed for observations in the region of Saturn during the flyby. All of the reference stars are in the range 12h 40min to 14h 12min in right ascension (1950) and +02deg. to -09deg. in declination. Mean errors of the positions are about 0.25". Introduction: The Lick Saturn-Voyager Reference Star Catalogue was prepared for purposes of determining up-to-date, reasonably accurate, equatorial coordinates for reference stars in a band of sky against which cameras of the Voyager spacecraft were aligned for observations in the region of Saturn during the flyby. The requirements were a surface density of about three reference stars per observation frame of 24 sq.arcmin of the cameras - somewhat greater that the SAO (Smithsonian Astrophsyical Observatory Staff 1966) and the AGK3 (Dieckvoss et al. 1975) densities - and a positional accuracy +/- 0.5". Visual magnitudes were also required. The completed catalog contains 4551 stars in the right ascension range 12h 40min to 14h 12min, declination zones +02deg. to -09deg. Mean errors of the positions, as derived from least squares solutions against the Perth 70 Catalogue (Hoeg and von der Heide 1976), are about 0.25"; however, individual residuals for some bright and excessively faint stars are as high as 0.5" to 1.0". The accidental error of one measurement, as deduced from a tabular histogram given in the original catalog publication (referenced below), is about 0.09". Apparent photographic and visual magnitudes were derived from iris photometer measurements, visual magnitude being approximated from a derived color-index relation using UBV stars selected from the USNO photoelectric catalog (Blanco et al. 1968) and extended with Perth 70 stars. The resulting magnitudes appear to have mean errors of at least 0.2mag - 0.3mag for the brighter stars (visual magnitude < 10mag) and uncertainties can be as much as 0.5mag for the fainter stars. The magnitudes are considered to be only approximate, especially on the faint end, because of a lack of photoelectric standards there. For additional information concerning the observations and reductions, the original publication (available from A. R. Klemola) should be consulted.