IVOA Catalogue Data Model

3.4.1.2 Source.IAUNameIAU name of the source3.4.1.3 Source.SIMBADNameSIMBAD name of the identified counterpart3.4.1.4 Source.typeSource classification. It may reflect a standard object classification as in, e.g.,http://simbad.u-strasbg.fr/guide/chF.htx3.4.1.5 Source.coordinatesThe sky coordinates of the source3.4.1.6 Source.distanceDistance of the source from "distanceOrigin". The cosmological redshift is apossible instantiation of this attribute3.4.1.7 Source.distanceDeterminationMethodMethod employed to determine "distance". "Spectra", "Photometric", "Parallax"are possible values of this attribute3.4.1.8 Source.distanceOriginOrigin from which "distance" is being measured3.4.1.9 Source.properMotionThe source proper motion on the sky vault3.4.1.10 Source.radialVelocityThe radial component of the source velocity3.4.1.11 Source.varAmplitudeThe amplitude of "varType". It can be expressed either in physical absolute,r.m.s., or in fractional units3.4.1.12 Source.varPeriodThe type of source variability: "Periodic", "Quasi-periodic", "Burst of Type I","Aperiodic" are possible values of this attribute3.4.1.13 Source.polarisatinDegreeDegree of source polarization3.4.1.14 Source.polarisationAnglePositional angle of the source polarization