VLAECDFSOI ivo://nasa.heasarc/vlaecdfsoi NASA/GSFC HEASARC Bonzini et al. 2026-07-17 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Survey Source This table contains a sample of 883 sources detected in a deep Very Large Array (VLA) survey at 1.4 GHz in the Extended-Chandra Deep Field South (E-CDFS). The reference paper focuses on the identification of their optical and infrared (IR) counterparts. The authors use a likelihood-ratio technique that is particularly useful when dealing with deep optical images to minimize the number of spurious associations. They find a reliable counterpart for 95% of their radio sources. Most of the counterparts (74%) are detected at optical wavelengths, but there is a significant fraction (21%) that are only detectable in the IR. Combining newly acquired optical spectra with data from the literature, the authors are able to assign a redshift to 81% of the identified radio sources (37% spectroscopic). They also investigate the X-ray properties of the radio sources using the Chandra 4 Ms and 250 ks observations. In particular, the authors use a stacking technique to derive the average properties of radio objects undetected in the Chandra images. The results of their analysis are collected in this new catalog containing the position of the optical/IR counterpart, the redshift information, and the X-ray fluxes. It is the deepest multi-wavelength catalog of radio sources, which will be used for future study of this galaxy population. The E-CDFS was observed at 1.4 GHz with the VLA between 2007 June and September (Miller et al. 2008, ApJS, 179, 114). The mosaic image covered an area of about 34 by 34 arcminutes with near-uniform sensitivity. The typical rms is 7.4 µJy for a 2.8 by 1.6 arcseconds beam. The second data release (N. Miller et al. 2012, in preparation) provides a new source catalog with a 5-sigma point-source detection limit, for a total of 883 sources. The median value of the distribution is 58.5 µJy and the median signal-to-noise ratio (S/N) is 7.6. The authors note that ~ 90% of the sample has a flux density below 1 mJy, a regime where radio-quiet AGNs and star-forming galaxies (SFGs) become the dominant populations This table was created by the HEASARC in November 2012 based on the files table3.dat and table5.dat which were obtained from the ApJS web site. This is a service provided by NASA HEASARC . 2012ApJS..203...15B https://heasarc.gsfc.nasa.gov/W3Browse/all/vlaecdfsoi.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=vlaecdfsoi& GET text/xml 180 99999 true 52.99079167 -28.09113889 0.0166666666666667 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=vlaecdfsoi GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_vlaecdfsoi&Action=More+Options&Action=Parameter+Search&ConeAdd=1 CHANDRA 0.0166666666666667 Infrared Optical Radio X-ray public vlaecdfsoi VLA Extended-Chandra Deep Field-South 1.4-GHz Sources Opt/IR Cou source_number Sequential Identification Number for Each Source in Catalog meta.id;src short nullable name Source Designation meta.id;meta.main char nullable ra Right Ascension of Radio Source degree pos.eq.ra;meta.main double nullable dec Declination of Radio Source degree pos.eq.dec;meta.main double nullable flux_1p4_ghz Radio Flux Density mJy phot.flux.density;em.radio.750-1500MHz double nullable flux_1p4_ghz_error 1-Sigma Error in Radio Flux Density mJy stat.error;phot.flux.density;em.radio.750-1500MHz double nullable rmag WFI Catalog R-Band AB Magnitude mag phot.mag;em.opt.R double nullable rmag_error Error in WFI Catalog R-Band AB Magnitude mag stat.error;phot.mag;em.opt.R double nullable irac_3p6_um_mag SIMPLE Catalog 3.6-Micron-Band AB Magnitude mag phot.flux.density;em.IR.3-4um double nullable irac_3p6_um_mag_error Error in SIMPLE Catalog 3.6-Micron-Band AB Magnitude mag stat.error;phot.flux.density;em.IR.3-4um double nullable sb_xray_flux_error Error in Soft-Band X-Ray Flux erg/s/cm^2 stat.error;phot.flux;em.X-ray.soft double nullable redshift Best Redshift of Counterpart (Spectroscopic If Flag >= 2, Photometric Otherwise) src.redshift double nullable ks_mag_error Error in MUSYC Catalog K_S_-Band AB Magnitude mag stat.error;phot.mag;em.IR.K double nullable xray_source_number X-Ray Source Identifier meta.id.assoc short nullable phot_redshift Photometric Redshift src.redshift double nullable ctrpart_dec Counterpart Declination degree pos.eq.dec double nullable assoc_reliability Reliability of the Association (9.00 Indicates Revisited Association) stat.fit.goodness double nullable phot_redshift_pos_err Upper 68% Uncertainty in Photometric Redshift stat.error;src.redshift double nullable ctrpart_catalog Counterpart Catalog meta.ref char nullable lii Galactic Longitude of Radio Source degree pos.galactic.lon double nullable spect_redshift Spectroscopic Redshift mag src.redshift double nullable ref_phot_redshift Reference for Photometric Redshift meta.ref;src.redshift char nullable snr_1p4_ghz Signal-to-Noise Ratio stat.snr;phot.flux.density;em.radio.750-1500MHz double nullable phot_redshift_neg_err Lower 68% Uncertainty in Photometric Redshift stat.error;src.redshift double nullable ctrpart_ra Counterpart Right Ascension degree double nullable ref_spect_redshift Reference for Spectroscopic Redshift meta.ref;src.redshift char nullable hb_xray_flux_error Error in Hard-Band X-Ray Flux erg/s/cm^2 stat.error;phot.flux;em.X-ray.medium double nullable bii Galactic Latitude of Radio Source degree pos.galactic.lat double nullable sb_xray_flux Soft-Band X-Ray Flux (0.5-2 keV) erg/s/cm^2 phot.flux;em.X-ray.soft double nullable ks_mag MUSYC Catalog K_S_-Band AB Magnitude mag phot.mag;em.IR.K double nullable redshift_flag Flag Indicates Quality of Redshift meta.code;src.redshift short nullable hb_xray_flux Hard-Band X-Ray Flux (2-10 keV) erg/s/cm^2 phot.flux;em.X-ray.medium 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 off_set Distance Between Radio and Counterpart arcsec pos.angDistance double nullable