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Дата изменения: Wed Mar 18 12:25:11 2015 Дата индексирования: Sun Apr 10 04:20:50 2016 Кодировка: Поисковые слова: comet |
name: the Parkes source name.
S_2.7, S_5.0, alpha, Rf: the 2.7 and 5.0GHz source fluxes and corresponding spectral index as published in reference Rf (see Table: refradio_surveys).
RA(B1950), Dec(B1950), Rc: the accurate B1950 (i.e. equinox B1950 and epoch B1950) radio source positions from reference Rc.
comment: (1) a brief description of the radio morphology if the source is resolved using the terminology of Downes et al. (1986): ``P'' for partially resolved sources, ``Do'' for double sources with no central component with the position defined by the centroid of the source, ``Do+CC'' for double sources with a central component or peak giving a well-defined position, ``H'' for a diffuse halo around a central source, and ``HT'' for a complex head-tail morphology. (2) comments in parentheses refer to the optical identification. In cases where there was no match to the sky catalogues but the source was identified using CCD data, these are indicated as ``(B)'', ``(R)'', ``(I)'' and ''(K)'' for the respective wavebands. If the CCD imaging did not identify the source, the comment ``null'' is made and ``STR'' indicates a source too near a bright star. If the source was confused with a close neighbour in the sky catalogues, but separated by a CCD image the comment ``merge'' is made followed by the waveband used; in some cases the Digitized Sky Survey data was used to separate the object (``DSS'').
Delta RA, Delta Dec, Delta r, cl, bj: the position offsets (arcsec, in the sense optical-radio) of the corresponding optical image (if any), the total separation, the image classification (``g'' galaxy, ``s'' stellar, ``f'' too faint to classify, ``m'' merged) and the apparent bj magnitude if the counterpart was found in the sky survey data.
z, Rz, Rsp: the emission redshift of the source obtained from reference code Rz. If no emission redshift has been measured, but absorption lines have been identified these are used to place a lower limit on the source redshift indicated in the form ``>0.500''. If a spectrum has been published it can be found in reference Rsp.
RA(J2000), Dec(J2000): the corresponding J2000 positions.