Based on observations made with the Italian Telescopio Nazionale Galileo (TNG) operated on the island of La Palma by the Centro Galileo Galilei of the INAF (Istituto Nazionale di Astrofisica) at the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofisica de Canarias and on spectral data retrieved from the ELODIE archive at Observatoire de Haute-Provence (OHP).

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Present address: Department of Astronomy and Space Physics, Uppsala University, Box 515, 751 20 Uppsala, Sweden.

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... RU)

ftp://ftp.wins.uva.nl/pub/orth

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... Sirius

http://cfaku5.cfa.harvard.edu/Stars/SIRIUS

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