VLASXDF1P4 ivo://nasa.heasarc/vlasxdf1p4 NASA/GSFC HEASARC Simpson et al. 2026-10-02 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Survey Source This table contains results from the deep radio imaging at 1.4 GHz of the 1.3-deg<sup>2</sup> Subaru/XMM-Newton Deep Field (SXDF), made with the Very Large Array (VLA) in B and C configurations. This resulted in a radio map of the entire field, and a catalog of 505 sources covering 0.8 deg<sup>2</sup> to a peak flux density limit of 100 microJansky (µJy), which corresponds to signal-to-noise (S/N) ratios of between 5 and 8. Robust optical identifications are provided for 90 per cent of the sources, and suggested identifications are presented for all but 14 (of which seven are optically blank, and seven are close to bright contaminating objects). The authors show that the optical properties of the radio sources do not change with flux density, suggesting that active galactic nuclei (AGN) continue to contribute significantly at faint flux densities. they test this assertion by cross-correlating their radio catalog with the X-ray source catalog and conclude that radio-quiet AGN become a significant population at flux densities below 300 uJy, and may dominate the population responsible for the flattening of the radio source counts if a significant fraction of them are Compton-thick. The SXDF was observed with NRAO's VLA in B-array using the 14 overlapping pointings arranged an an hexagonal pattern that are listed in Table 1 of the reference paper. Three test observations of pointings 1, 4 and 6 were taken on 2001 May 17, and the rest of the data were obtained in 13 runs, each lasting 4.5 hours, between 2002 August 10 and September 9. All 14 pointings were re-observed in C-array on 2003 January 15 to provide additional information on larger angular scales. This table contains the catalog of 505 detected radio sources and their proposed optical counterparts (the latter taken mostly from the ultra-deep BRíz' Suprime-Cam images of the SXDF). As mentioned above, 14 of these 505 radio sources have no suggested identifications. Additionally, 7 of the radio sources (source numbers 16, 114, 129, 263, 360, 361 and 488) have 2 listed optical identifications: in such cases, there are 2 entries for each source listed detailing the alternative optical counterparts, and with identical sets of radio parameters. Thus, there are 512 = 505 + 7 entries in this table. This table was created by the HEASARC in August 2013 based on <a href="https://cdsarc.cds.unistra.fr/ftp/cats/J/MNRAS/372/741">CDS Catalog J/MNRAS/372/741</a> file table3.dat. This is a service provided by NASA HEASARC . 2006MNRAS.372..741S https://heasarc.gsfc.nasa.gov/W3Browse/all/vlasxdf1p4.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=vlasxdf1p4& GET text/xml 180 99999 true 34.51404167 -5.64027778 0.0166666666666667 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=vlasxdf1p4 GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_vlasxdf1p4&Action=More+Options&Action=Parameter+Search&ConeAdd=1 RADIO CATALOG 0.0166666666666667 Radio public vlasxdf1p4 VLA Subaru/XMM-Newton Deep Field 1.4-GHz Source Catalog source_number Sequential Identification Number for Each Source in Catalog meta.id;src short nullable name Source Designation ([SMR2006] VLA JHHMMSS-DDMMm) 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_1p4_ghz Flux Density at 1.4GHz mJy phot.flux.density;em.radio.750-1500MHz double nullable flux_1p4_ghz_error RMS Uncertainty in Flux Density at 1.4GHz mJy stat.error;phot.flux.density;em.radio.750-1500MHz double nullable optical_id Optical Catalog Identification meta.id.cross char nullable optical_ra Optical Right Ascension degree pos.eq.ra double nullable optical_dec Optical Declination degree pos.eq.dec double nullable redshift Spectroscopic Redshift src.redshift double nullable redshift_flag Flag [?] Indicates Redshift Is Uncertain meta.code;src.redshift char nullable bmag B Magnitude on AB Scale mag phot.mag;em.opt.B double nullable id_comments Comments on Identification meta.note char nullable bii Galactic Latitude degree pos.galactic.lat double nullable imag i-Prime Magnitude on AB Scale mag phot.mag;em.opt.I double nullable vmag V Magnitude on AB Scale mag phot.mag;em.opt.V double nullable rmag R Magnitude on AB Scale mag phot.mag;em.opt.R double nullable zmag z-Prime Magnitude on AB Scale mag phot.mag;em.opt double nullable optid_reliability Reliability of the Optical Identification meta.code double nullable alt_name Alternative Catalog-Based Source Designation meta.id char nullable optid_reliability_qual Flag [ABC-] Indicates Note When No Reliability Value meta.code char nullable lii Galactic Longitude degree pos.galactic.lon 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