VLACDFSCAT ivo://nasa.heasarc/vlacdfscat NASA/GSFC HEASARC Kellermann 2026-10-09 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Survey Source This table contains some of the results from 20 and 6 cm VLA deep observations of the Chandra Deep Field-South (CDF-S), including the Extended CDF-S (E-CDF-S). In the reference paper, the authors discuss the radio properties of 266 cataloged radio sources, of which 198 are above a 20-cm completeness level reaching down to 43 microJanskies (µJy) at the center of the field. Survey observations made at 6 cm over a more limited region cover the original CDF-S to a comparable level of sensitivity as the 20-cm observations. Of 266 cataloged radio sources, 52 have X-ray counterparts in the CDF-S and a further 37 have counterparts in the E-CDF-S area not covered by the 1 Ms exposure. Using a wide range of material, the authors have found optical or infrared counterparts for 254 radio sources, of which 186 have either spectroscopic or photometric redshifts. Three radio sources have no apparent counterpart at any other wavelength. Measurements of the 20-cm radio flux density at the position of each CDF-S X-ray source detected a further 30 radio sources (not included in this table) above a conservative 3-sigma detection limit. X-ray and sub-millimeter observations have been traditionally used as a measure of AGN and star formation activity, respectively. These new observations probe the faint end of both the star formation and radio galaxy/AGN population, as well as the connection between the formation and evolution of stars and SMBHs. Both of the corresponding gravitational and nuclear fusion-driven energy sources can lead to radio synchrotron emission. AGN and radio galaxies dominate at high flux densities. Although emission from star formation becomes more prominent at the microJansky levels reached by deep radio surveys, even for the weakest sources, an apparent significant contribution from low-luminosity AGN as well as from star formation is still found. Notice that are 319 entries in this table corresponding to the 266 catalogued radio sources, due to the fact that some of these sources have multiple components. In such cases, the composite source as well as each of its components are listed as separate entries, e.g., source 7 which has 3 components (A, B and C) has 4 entries in this table. This table was created by the HEASARC in November 2008 based on the electronic version of Table 1 from the reference paper which was obtained from the ApJ web site. This is a service provided by NASA HEASARC . 2008ApJS..179...71K https://heasarc.gsfc.nasa.gov/W3Browse/all/vlacdfscat.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=vlacdfscat& GET text/xml 180 99999 true 53.18908333 -28.08063889 0.0166666666666667 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=vlacdfscat GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_vlacdfscat&Action=More+Options&Action=Parameter+Search&ConeAdd=1 RADIO CATALOG 0.0166666666666667 Radio public vlacdfscat VLA Survey of Chandra Deep Field South name Catalog Source Designation meta.id;meta.main char nullable ra Right Ascension degree pos.eq.ra;meta.main double nullable dec Declination degree pos.eq.dec;meta.main double nullable flux_20_cm The 1.4-GHz (20-cm) Flux Density (mJy) mJy phot.flux.density;em.radio.750-1500MHz double nullable flux_20_cm_error RMS Error in the 1.4-GHz (20-cm) Flux Density (mJy) mJy stat.error;phot.flux.density;em.radio.750-1500MHz double nullable angular_size_limit Limit Flag for Angular Size meta.code;phys.angSize char nullable angular_size Overall 1.4-GHz Image Angular Size (arcsec) arcsec phys.angSize double nullable cxo_id Chandra Source Identifier meta.id.cross char nullable ra_error RMS Error in Right Ascension (s) s stat.error;pos.eq.ra;meta.main double nullable alt_name Alternative Source Designation meta.id char nullable source_flag Flag [N] Indicates Source Not in the Complete 20-cm Catalog meta.code char nullable bii Galactic Latitude degree pos.galactic.lat double nullable spectral_index Spectral Index Between 4.8 and 1.4 GHz spect.index;em.radio double nullable log_lx Log of Chandra Full 0.5-10-keV Band Luminosity log(erg/s) phys.luminosity;em.X-ray double nullable snr_20_cm Signal-to-Noise Ratio of 1.4-GHz Image stat.snr;phot.flux.density;em.radio.750-1500MHz double nullable rmag R-Band Magnitude of Most Likely Optical Counterpart mag phot.mag;em.opt.R double nullable flux_6_cm_error RMS Error in the 4.8-GHz (6-cm) Flux Density (mJy) mJy stat.error;phot.flux.density;em.radio.3-6GHz double nullable log_cxo_flux Log of Chandra Full 0.5-10-keV Band Flux log(erg/s/cm^2) phot.flux;em.X-ray double nullable flux_6_cm The 4.8-GHz (6-cm) Flux Density (mJy) mJy phot.flux.density;em.radio.3-6GHz double nullable dec_error RMS Error in Declination (arcsec) arcsec stat.error;pos.eq.dec;meta.main double nullable log_lrad Log of 1.4-GHz Rest Frame Radio Luminosity log(W/Hz) phys.luminosity;em.radio double nullable spectral_index_error RMS Error in Spectral Index stat.error;spect.index;em.radio double nullable lii Galactic Longitude degree pos.galactic.lon double nullable source_id Source Running Number meta.id char nullable redshift Redshift of Most Likely Optical Counterpart src.redshift double nullable "__x_ra_dec" System unit vector column double nullable "__y_ra_dec" System unit vector column double nullable "__z_ra_dec" System unit vector column double nullable "__row" System index column char nullable