NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-04-18 T14:13:54 PDT
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For refcode 1990A&AS...82..391B:
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Copyright by European Southern Observatory (ESO). Reproduced by permission
1990A&AS...82..391B An extragalactic data base II. The H I data L. Bottinelli, L. Gouguenheim, P. Fouque and G. Paturel Observatoire de Paris, Section de Meudon, DERAD, 92195 Meudon Principal Cedex. France Observatoire de Lyon, 19230 Saint-Genis Laval, France Received August 7, accepted October 5, 1989 Abstract. - A compilation of raw H I data has been made as a part of a big project of collecting astrophysical parameters for more than 70000 galaxies. This information is managed with a specialized Extragalactic Data Base system. Corrections to produce homogenized H I-parameters are deduced from the compilation made for the Extragalactic Data Base. All raw 21 cm line widths are reduced to a common system of widths at 20% and 50% of the peak. They are corrected for velocity resolution effect and tested for homogeneity reference by reference. The H I fluxes converted to uniform units system (log of 10^-24^W m^-2^) are corrected. when necessary, for beam-filling effect. The homogenized mean fluxes are tested for scale and zero-point errors and also for a reference effect. Heliocentric H I-velocities are reduced in the same way. These results have been used to produce a catalogue of weighted mean H I-parameters for 6439 galaxies. Key words: galaxies - radio lines: 21-cm - catalogues.
Retrieve 6395 NED objects in this reference.
Please click here for ADS abstract

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