FIRST ivo://wfau.roe.ac.uk/first-dsa WFAU, Institute for Astronomy, University of Edinburgh Robert H. Becker, David J. Helfand, Richard L. White 2010-02-15 03Apr11 Version Mark Holliman msh@roe.ac.uk Faint Images of the Radio Sky at Twenty-cm FIRST FIRST (Faint Images of the Radio Sky at Twenty-cm) is a project designed to produce the radio equivalent of the Palomar Observatory Sky Survey over 10,000 square degrees of the North and South Galactic Caps. The catalogue covers a total of about 9033 square degrees of sky (8422 square degrees in the north Galactic cap and 611 square degrees in the south Galactic cap.) http://sundog.stsci.edu/first/catalogs/readme.html Catalog Research service-for ivo://wfau.roe.ac.uk/first-dsa/ceaApplication firstSource table: cone search http://wfaudata.roe.ac.uk/first-dsa/DirectCone?DSACAT=FIRST&DSATAB=firstSource& 1.500000 2000000 false 16.6 -1.8 0.1 http://wfaudata.roe.ac.uk/first-dsa/VOSI/capabilities GET application/xml http://wfaudata.roe.ac.uk/first-dsa/VOSI/capabilities GET application/xml http://wfaudata.roe.ac.uk/first-dsa/VOSI/availability GET application/xml http://wfaudata.roe.ac.uk/first-dsa/VOSI/availability GET application/xml http://wfaudata.roe.ac.uk/first-dsa/VOSI/tables GET application/xml http://wfaudata.roe.ac.uk/first-dsa/delegations GET application/xml Radio FIRST Survey Catalogue The query response table. Queries to this service will return a VOTable with the structure described here. firstSourceContains the parameters provided for each source in the FIRST Survey Catalog: 03Apr11 Version fieldName Name of the coadded image containing the source (encodes the position of the field center). ID_IMAGE char seqNo sequential object number ID_MAIN char cx unit vector of spherical co-ordinates POS_EQ_X double cy unit vector of spherical co-ordinates POS_EQ_Y double cz unit vector of spherical co-ordinates POS_EQ_Z double htmID Hierarchical Triangular Mesh (HTM) index, 20 deep, for equatorial co-ordinates POS_GENERAL long ra J2000 Celestial Right Ascension deg POS_EQ_RA_MAIN double dec J2000 Celestial Declination deg POS_EQ_DEC_MAIN double warnFlag Warning flag indicating that the source may be a sidelobe of a nearby bright source. CODE_MISC char fPeak peak flux densities mJy PHOT_FLUX_RADIO_1.4G double fInt integrated flux densities mJy PHOT_FLUX_RADIO_1.4G double rms local noise estimate at the source position mJy INST_NOISE double maj major axes derived from the elliptical Gaussian model for the source after deconvolution. arcsec EXTENSION_FWHM_MAJ double min minor axes derived from the elliptical Gaussian model for the source after deconvolution. arcsec EXTENSION_FWHM_MIN double pa position angle (east of north) derived from the elliptical Gaussian model for the source deg POS_POS-ANG double fMaj major axes derived from the elliptical Gaussian model for the source before deconvolution. arcsec EXTENSION_FWHM_MAJ double fMin minor axes derived from the elliptical Gaussian model for the source before deconvolution. arcsec EXTENSION_FWHM_MIN double fPA position angle (east of north) derived from the elliptical Gaussian model for the source before deconvolution. deg POS_POS-ANG double