Optical positions of radio stars observed with the meridian circle of the Real Instituto Y Observatorio de la Armada EN San Fernando

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Astrometry, Astronomical Catalogs, Radio Stars, Astronomical Observatories, Astronomical Photometry, Electrophotometers, Position (Location)

Scientific paper

Positions of 53 radio stars observed with a meridian circle are presented. The positions of the radio stars are for the epoch of observation and the equinox J2000.0 and are in a system close to that of the FK5. The limiting magnitude is V = 9.5. The instrument is a classic visual meridian circle. The observation of transits of the stars is visual but automatically recorded; a photoelectric circle reading system stores the positions of the divided circle directly in computer memory. The mean error of a single observation in the zenith is 0.018 s in right ascension and 0.38 arcsec in declination. Comparisons are given of the catalogue with the FK5 and of radio stars positions with those of the Carlsberg Meridian Catalogue La Palma no. 4. Cross-references are given to other catalogues.

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