B/avo.radivo://CDS.VizieR/B/avo.radCDSMuxlow T.W.BRichards A.M.SGarrington S.T.Wilkinson P.N.Anderson B.A.Richards E.A.Axon D.J.Partridge R.B.,Kellermann K.I.Fomalont E.B.Muxlow T.W.Bet al. MNRAS (in press)2003-01-18T15:16:26Z2003-01-18T16:16:15ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frradio-sourcessurveys18 days of MERLIN data and 42 hours of A-array VLA data at 1.4 GHz have been combined to image a 10 arcminute field centred on the Hubble Deep Field. This area includes both the Hubble Deep and Flanking Fields. A complete sample of 92 sources with flux densities above 40{mu}Jy have been detected using the VLA data, and imaged with the MERLIN+VLA combination at resolutions of 0.2, 0.3 and 0.5 arcsecond. These are the most sensitive 1.4 GHz images yet made, with rms noise levels of 3.3{mu}Jy/beam in the 0.2 arcsecond images. Virtually all the objects are resolved by the MERLIN+VLA combination images showing that they have angular sizes in the range 0.2 to 3 arcseconds, typically smaller than the sizes of the optical galaxy images. In addition to the imaging of 92 sources found with the VLA alone, the central 3 arcminutes, which encloses the HDF, has been separately imaged with the MERLIN+VLA combination at the full 3.3{mu}Jy/beam sensitivity to search for compact sources fainter than 40{mu}Jy. No additional sources were found that were not previously detected by the VLA, indicating that such sources are heavily resolved with MERLIN and hence must have typical angular sizes >0.5 arcseconds. In addition to the images, high quality astrometry is an equally important product of this work allowing reliable source identification in a crowded field. Radio sources associated with compact galaxies have been used to align both the HST WFPC2 frames and a CFHT optical field to the ICRF. The HST optical field has been aligned to better than 50 mas in the Deep Field itself, and to ~150 mas in the outer parts of the Flanking Fields. The proportion of starburst systems is found to increase with decreasing source strength. At fluxes below 100{mu}Jy in excess of 70% of the {mu}Jy sources are found to be starburst type systems associated with major disc galaxies in the redshift range 0.3 - 1.3. Some 40% of the brighter sources are found to be intermediate luminosity AGN systems identified with galxies in a similar redshift range. Around 85% of the sources are identified with galaxies brighter than I=25mag. The remaining 15% are associated with optically faint systems close to or beyond the HDF limit; many of these may be dust-shrouded starburst galaxies at high redshift (z>3). Approaching half the sources in the 10 arcminute field are detected in X-rays by the Chandra Satellite. The X-ray detection rate appears to be uncorrelated with the radio source classification.2003MNRAS.(in.press)https://cdsarc.cds.unistra.fr/viz-bin/cat/B/avo.radCatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toftp://ftp.jb.man.ac.uk/pub/merlin/AVODEMO/hdfmnras11.ps : Draft offtp://ftp.jb.man.ac.uk/pub/merlin/AVODEMO/hdfmnras2_new_table.ps : tableftp://ftp.jb.man.ac.uk/pub/merlin/AVODEMO/starpic.ps : colour figurehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=B/avo.radhttps://vizier.iucaa.in/viz-bin/VizieR-2?-source=B/avo.radhttp://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=B/avo.radhttps://vizier.cds.unistra.fr/viz-bin/votable?-source=B/avo.radhttps://vizier.iucaa.in/viz-bin/votable?-source=B/avo.radhttp://vizieridia.saao.ac.za/viz-bin/votable?-source=B/avo.radGETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table B/avo.rad/catalog (MERLIN+VLA HFF/HDF(N) catalogue)https://vizier.cds.unistra.fr/viz-bin/conesearch/B/avo.rad/catalog?https://vizier.iucaa.in/viz-bin/conesearch/B/avo.rad/catalog?http://vizieridia.saao.ac.za/viz-bin/conesearch/B/avo.rad/catalog?GETtext/xml+votable180.050000true189.02755333362.1642058330.005555555555555556Cone search capability for table B/avo.rad/wsrt (WSRT data)https://vizier.cds.unistra.fr/viz-bin/conesearch/B/avo.rad/wsrt?https://vizier.iucaa.in/viz-bin/conesearch/B/avo.rad/wsrt?http://vizieridia.saao.ac.za/viz-bin/conesearch/B/avo.rad/wsrt?GETtext/xml+votable180.050000true189.02755333362.1642058330.0055555555555555566/11252https://cdsarc.cds.unistra.fr/viz-bin/moc/B/avo.rad?format=asciiRadiodefaultB/avo.rad/catalogMERLIN+VLA HFF/HDF(N) cataloguez? Redshiftsrc.redshiftfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameDesignation of the sourcemeta.id;meta.maincharRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.maine_RAsRelative position error in Right Ascension (1)masstat.errorintDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.maine_DEsRelative position error in Declination (1)masstat.errorintBeamCircular restoring beam diameter in map used for analysisarcsecphys.angSize;instr.beamfloatVpos[V] means low surface brightness extended source, VLA position given.meta.codecharOptCounterpart is seen in CFHT or HST image (2)meta.id.crosscharFreqFrequency of the observationHzem.freqdoublenullableVfluxTotal flux density in VLA image at 1.4GHz (2arcsec resolution)Jyphot.flux.densitydoublee_VfluxMean error on VfluxJystat.errordoubleLASLargest angular sizearcsecphys.angSize;srcfloatWSRT? ID in WSRT catalogue (2000A&A...361L..41G)meta.id;meta.datasetintnullableWpeak? Peak WSRT flux density at 1.38GHz (15arcsec resolution)Jyphot.flux.density;em.radio.750-1500MHzdoublenullableWint? Integrated WSRT flux densityJyphot.flux.density;em.radio.750-1500MHzdoublenullablem_WSRTWSRT flux densities include two sources with same WSRT IDmeta.code.multipcharl_Sp-IndexSp-Index is lower limitmeta.code.errorcharSp-Index? Spectral index between 8.4 and 1.4 GHz (2000ApJ...533...611R)spect.indexfloatnullableStructRadio structural description (3)meta.code;src.morphcharl_Imag[>~] Imag is approximative or lower limitmeta.code.errorcharImag? I magnitude from CFHT or HST (2)magphot.mag;em.opt.IfloatnullableX-ray[Yes No] Counterpart is seen in CHANDRA image (2001AJ....122.2810B)meta.codecharIR[Yes No] Counterpart is seen in ISO image (1999A&A...342..313A)meta.codecharAlignRadio-optical alignment characteristicsmeta.notecharClassClassification of galaxy (4)src.classcharf_z[SP] Redshift Type: Spectroscopic, Photometricmeta.code.errorcharr_zBibliographic reference for redshiftmeta.refcharFigFigure number in which the source can be viewedmeta.bib.figintnullableFWHMFWHM BandpassHzinstr.bandwidthdoublenullableB/avo.rad/wsrtWSRT dataOptCounterpart is seen in CFHT or HST imagemeta.id.crosscharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameDesignation of the sourcemeta.id;meta.maincharRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.maine_RAsRelative position error in Right Ascensionmasstat.errorintDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.maine_DEsRelative position error in Declinationmasstat.errorintBeamCircular restoring beam diameter in map used for analysisarcsecphys.angSize;instr.beamfloatVpos[V] means low surface brightness extended source, VLA position given.meta.codecharWSRT? ID in WSRT catalogue (2000A&A...361L..41G)meta.id;meta.datasetintnullableWpeak? Peak WSRT flux density at 1.38GHz (15arcsec resolution)Jyphot.flux.densitydoublenullableWint? Integrated WSRT flux densityJyphot.flux.densitydoublenullablem_WSRTWSRT flux densities include two sources with same WSRT IDmeta.code.multipcharFreqFrequency of the observationHzem.freqdoublenullableFWHMFWHM BandpassHzinstr.bandwidthdoublenullable