J/MNRAS/431/194ivo://CDS.VizieR/J/MNRAS/431/194doi:10.26093/cds/vizier.74310194CDSAlberts S.Wilson G.W.Lu Y.Johnson S.Yun M.S.Scott K.S.Pope A.,Aretxaga I.Ezawa H.Hughes D.H.Kawabe R.Kim S.Kohno K.Oshima T.2026-01-13T20:13:29Z2014-06-19T09:21:11ZCDS support team

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

cds-question@unistra.frgalaxiesinfrared-sourcesradio-galaxiesastronomical-object-identificationWe present a new submm/mm galaxy counterpart identification technique which builds on the use of Spitzer Infrared Array Camera (IRAC) colours as discriminators between likely counterparts and the general IRAC galaxy population. Using 102 radio- and Submillimeter Array-confirmed counterparts to AzTEC sources across three fields [Great Observatories Origins Deep Survey-North, -South and Cosmic Evolution Survey (COSMOS)], we develop a non-parametric IRAC colour-colour characteristic density distribution, which, when combined with positional uncertainty information via likelihood ratios, allows us to rank all potential IRAC counterparts around submillimetre galaxies (SMGs) and calculate the significance of each ranking via the reliability factor. We report all robust and tentative radio counterparts to SMGs, the first such list available for AzTEC/COSMOS, as well as the highest ranked IRAC counterparts for all AzTEC SMGs in these fields as determined by our technique. We demonstrate that the technique is free of radio bias and thus applicable regardless of radio detections. For observations made with a moderate beam size (~18"), this technique identifies ~85% of SMG counterparts. For much larger beam sizes (>~30"), we report identification rates of 33-49%. Using simulations, we demonstrate that this technique is an improvement over using positional information alone for observations with facilities such as AzTEC on the Large Millimeter Telescope and Submillimeter Common User Bolometer Array 2 on the James Clerk Maxwell Telescope.2013MNRAS.431..194Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/431/194CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/379/1571 : SCUBA Half-Degree Extragalactic Survey. IV (Aretxaga+, 2007)J/MNRAS/423/529 : AzTEC deep-field observations (Downes+, 2012)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/431/194https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/431/194http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/431/194https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/431/194https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/431/194http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/431/194GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/431/194/radio (AzTEC sub-mm galaxies with radio counterparts in GOODS-N, GOODS-S and COSMOS fields (tables A1 and A2))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/431/194/radio?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/431/194/radio?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/431/194/radio?GETtext/xml+votable180.050000true189.362.36952780.005555555555555556Cone search capability for table J/MNRAS/431/194/tablea3 (Radio-undetected SMG set: list of SMGs without radio detections)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/431/194/tablea3?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/431/194/tablea3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/431/194/tablea3?GETtext/xml+votable180.050000true189.132833362.28608330.0055555555555555565/6814 6/11230 11252 35935https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/431/194?format=asciiInfraredRadiodefaultJ/MNRAS/431/194/radioAzTEC sub-mm galaxies with radio counterparts in GOODS-N, GOODS-S and COSMOS fields (tables A1 and A2)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFieldField name (COSMOS, GOODS-N or GOODS-S)obs.fieldcharAzTECAzTEC ID (G1)meta.id;meta.maincharn_AzTEC[defgj] Individual note on source (1)meta.notecharRS? Distance from radio sourcearcsecpos;arith.difffloatnullableRadioRadio counterpart name (JHHMMSS.ss+DDMMSS.s)meta.id.assoccharn_Radio[hd] Note on radio counterpart (1)meta.notecharPstat? P-statistic at 1.4GHz (best when Pstat<=0.05)stat.fit.goodnessfloatnullableIRACIRAC counterpart name (JHHMMSS.ss+DDMMSS.s) (2)meta.idcharn_IRAC[fi] Note on near-UD counterpart (1)meta.notecharRankRank (N/NN) (best when Rank = 1/N)meta.code.qualcharNirNumber of IRAC counterparts for this AzTEC sourcemeta.numberintnullableLR? Likelihood ratio of IRAC associationstat.likelihood;arith.ratiofloatnullablee_LR? rms uncertainty on LRstat.errorfloatnullableRel[0/1]? Reliability factor (best when Rel>=0.8)meta.code.qualfloatnullableOIDOther IDs (G2)meta.notechar_RAPositions from AzTEC catalogs (right ascension part)degpos.eq.ra;meta.main_DEPositions from AzTEC catalogs (declination part)degpos.eq.dec;meta.mainJ/MNRAS/431/194/tablea3Radio-undetected SMG set: list of SMGs without radio detections_RAPositions from AzTEC catalogs (right ascension part)degpos.eq.ra;meta.main_DEPositions from AzTEC catalogs (declination part)degpos.eq.dec;meta.mainrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFieldField name (COSMOS, GOODS-N or GOODS-S)obs.fieldcharAzTECAzTEC ID (G1)meta.id;meta.maincharRS? Distance from radio sourcearcsecpos;arith.difffloatnullableIRACIRAC counterpart name (JHHMMSS.ss+DDMMSS.s) (1)meta.idcharNirNumber of IRAC counterparts for this AzTEC sourcemeta.numberintnullableLR? Likelihood ratio of IRAC associationstat.likelihood;arith.ratiofloatnullablee_LR? rms uncertainty on LRstat.errorfloatnullableRel[0/1]? Reliability factor (best for Rel>=0.8)meta.code.qualfloatnullableOIDOther IDs (G2)meta.notechar