J/A+A/695/A79ivo://CDS.VizieR/J/A+A/695/A79doi:10.26093/cds/vizier.36950079CDSSchroeder A.C.van Driel W.Kraan-Korteweg R.C.Belleval C.2025-05-21T20:02:58Z2025-03-07T09:14:01ZCDS support team

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

cds-question@unistra.frradio-galaxiesradial-velocityspectroscopyWe present follow-up 21cm HI line observations made with the Nanccay Radio Telescope (NRT) of 99 weak or potential detections of galaxies from the EZOA catalogue in the northern Zone of Avoidance (ZoA), which were extracted from the shallow version of the EBHIS blind HI survey performed with the Effelsberg radio telescope. The new NRT observations are on average almost three times as sensitive as those from EBHIS. Of the 99 observed sources, we confirmed 72, while three yielded inconclusive results. We find that the quality assessment of the EZOA catalogue entries correlates well with the NRT recovery rate; for instance, only four of the 22 potential detections could be confirmed. Due to the higher sensitivity as well as the large north-south extent of the NRT beam, the NRT observations also yielded five serendipitous detections, which we include here. We updated the EZOA catalogue with the improved HI parameters and detections. To test mitigation of Radio Frequency Interference signals, we also observed selected sources using a dedicated receiver and data processing system.2025A&A...695A..79Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/695/A79CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/481/1262 : 2MASS bright galaxies HI ZoA survey (Kraan-Korteweg+, 2018)J/MNRAS/489/2907 : The EZOA survey (Schroder+, 2019)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/695/A79https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/695/A79http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/695/A79https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/695/A79https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/695/A79http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/695/A79GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/695/A79/tablea1 (Uncatalogued galaxies around EZOA sources and previously catalogued galaxies with improved positions)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/695/A79/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/695/A79/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/695/A79/tablea1?GETtext/xml+votable180.050000true284.002083-3.2058330.005555555555555556Cone search capability for table J/A+A/695/A79/tableb1 (HI observations of EZOA sources)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/695/A79/tableb1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/695/A79/tableb1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/695/A79/tableb1?GETtext/xml+votable180.050000true284.012917-3.2411110.005555555555555556Cone search capability for table J/A+A/695/A79/tableb2a (NRT detections of EZOA galaxies)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/695/A79/tableb2a?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/695/A79/tableb2a?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/695/A79/tableb2a?GETtext/xml+votable180.050000true284.002083-3.2058330.005555555555555556Cone search capability for table J/A+A/695/A79/tableb2b (Serendipitious NRT detections)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/695/A79/tableb2b?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/695/A79/tableb2b?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/695/A79/tableb2b?GETtext/xml+votable180.050000true337.5187551.6602780.0055555555555555566/1119 1271 1322 1387 1415 1432 1439 1442 1450 1455 1461 1743 1752 1793 1796 1801 1826 1938 1944 3017 3032 3069 3132 3142-3143 3151 3156-3157 3159 3196 3217 3223 3255 3273 3286 3313 3320 3325 3466 3488 3490 3585 3595 3598 3638 3643-3644 3663 3685 3717 13041 13229 13285 13982 14006 14009 14044 14197 14211 14215-14216 14232 14293 14298 14320 14357 14405 14426 14438 14611 14701 15373 15397-15398 15400 15424 15445 15448 15626 15694 22068 22088 22173 22442 23756 23789 23800 23815 23997 24146-24147 24153 24322 24478 24547 24552 30239 30609 30694https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/695/A79?format=asciiRadiodefaultJ/A+A/695/A79/tablea1Uncatalogued galaxies around EZOA sources and previously catalogued galaxies with improved positionsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEZOAID of the EZOA source (JHHMM-DDA)meta.id;meta.maincharGalaxyGalaxy ID (1)meta.idcharRAJ2000Right Ascension (J2000) (2)pos.eq.ra;meta.mainDEJ2000Declination (J2000) (2)pos.eq.dec;meta.mainupos[:] Coordinate uncertainty flag (2)meta.codecharSepAngular distance from the nominal EZOA position (3)arcminpos.angDistancefloatCommentCommentmeta.notecharJ/A+A/695/A79/tableb1HI observations of EZOA sourcesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEZOAID of the EZOA source (JHHMM-DD)meta.id;meta.maincharm_EZOA[B] Multiplicity index on EZOAmeta.code.multipcharRAJ2000EBHIS Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000EBHIS Declination (J2000)pos.eq.dec;meta.mainHRV-EEBHIS heliocentric radial velocitykm/sspect.dopplerVeloc;pos.heliocentricinte_HRV-EUncertainty in HRVkm/sstat.errorintW50-EEBHIS line width at 50% peak flux densitykm/sspect.line.widthinte_W50-EUncertainty in W50km/sstat.errorintFHI-EEBHIS HI flux integralJy.km/sphot.flux.density;em.radio.750-1500MHzfloate_FHI-EUncertainty in FHIJy.km/sstat.errorfloatSNR-EEBHIS Peak signal to noise ratiostat.snrfloatRAPPtg Right Ascension (J2000)pos.eq.raDEPPtg Declination (J2000)pos.eq.decd-EAngular distance between the NRT pointing position and the EBHIS source position (G4)beampos.angDistancefloatCandClassification of the cross-match candidate (G5)src.classcharcFlux? Class of the NRT/EBHIS flux ratio (G6)src.classintnullableRflux? Ratio of NRT and EBHIS integrated fluxesphot.flux;arith.ratiofloatnullableRMS-N? NRT spectrum rms noise levelmJyinstr.det.noisefloatnullableHRV-N? NRT heliocentric radial velocitykm/sspect.dopplerVeloc;pos.heliocentricintnullablee_HRV-N? Uncertainty in HRVkm/sstat.errorintnullableW50-N? NRT line width at 50% peak flux densitykm/sspect.line.widthintnullablee_W50-N? Uncertainty in W50km/sstat.errorintnullableW20-N? NRT line width at 20% peak flux densitykm/sspect.line.widthintnullablee_W20-N? Uncertainty in W20km/sstat.errorintnullableFHI-N? NRT HI flux integralJy.km/sphot.flux.density;em.radio.750-1500MHzfloatnullablee_FHI-N? Uncertainty in FHIJy.km/sstat.errorfloatnullableSNR-N? NRT Peak signal to noise ratiostat.snrfloatnullablePtg[ABCDE] NRT pointing IDmeta.id.part;meta.maincharClassClassification of the HI detection (G1)meta.code.classcharNote[n] Indicates a note in notes.dat filemeta.notecharn_PtgPointing footnote (G2)meta.notecharTgtPointing target classification (G3)meta.codecharffinalFinal NRT flag (G7)meta.codecharFileNameName of the spectrum file in subdirectory spmeta.id;meta.filecharJ/A+A/695/A79/tableb2aNRT detections of EZOA galaxiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEZOAID of the EZOA source (JHHMM-DD)meta.id;meta.maincharm_EZOA[B] Multiplicity index on EZOAmeta.code.multipcharClassClassification of the HI NRT detection (G1)meta.code.classcharNote[n] Indicates a note in notes.dat filemeta.notecharPtgNRT pointing IDmeta.id.part;meta.maincharf_PtgPointing footnote (G2)meta.codecharHRV-N? NRT heliocentric radial velocitykm/sspect.dopplerVeloc;pos.heliocentricintnullablee_HRV-N? Uncertainty in HRVkm/sstat.errorintnullableW50-N? NRT line width at 50% peak flux densitykm/sspect.line.widthintnullablee_W50-N? Uncertainty in W50km/sstat.errorintnullableW20-N? NRT line width at 20% peak flux densitykm/sspect.line.widthintnullablee_W20-N? Uncertainty in W20km/sstat.errorintnullableFHI-N? NRT HI flux integralJy.km/sphot.flux.density;em.radio.750-1500MHzfloatnullablee_FHI-N? Uncertainty in FHIJy.km/sstat.errorfloatnullableu_FHI-NUncertainty flag on flux (G8)meta.code.errorcharSNR-NNRT Peak signal to noise ratiostat.snrfloatvLG? Galaxy velocity vLG (G9)km/sphys.velocintnullableDist? Distance to the galaxy (based on vLG and H0=75km/s/Mpc)Mpcpos.distancefloatnullablelogMHI? Log HI masslog(solMass)phys.massfloatnullableu_logMHIUncertainty flag on HI mass (G8)meta.code.errorcharffinalFinal NRT flag (G7)meta.codechardbeamDistance between the NRT pointing position and the crossmatch (G10)beampos.angDistancefloatRACRight Ascension of counterpart (J2000) (G11)pos.eq.ra;meta.mainDECDeclination of counterpart (J2000) (G11)pos.eq.dec;meta.mainGLONGalactic longitude of counterpart position (G11)degpos.galactic.lonGLATGalactic latitude of of counterpart position (G11)degpos.galactic.latfloatAKThe K band extinction (G13)magphys.absorptionfloatCandFinal Classification of the cross-match candidate (G5)src.classcharePosPositional uncertainty (G12)stat.error;poscharIDcID of counterpart (G14)meta.idcharFileNameName of the spectrum file in subdirectory spmeta.id;meta.filecharJ/A+A/695/A79/tableb2bSerendipitious NRT detectionsAKThe K band extinction (G13)magphys.absorptionfloatIDcID of counterpart (G14)meta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEZOAID of the EZOA source (JHHMM-DD)meta.id;meta.maincharm_EZOA[B] Multiplicity index on EZOAmeta.code.multipcharClassClassification of the HI NRT detection (G1)meta.code.classcharNote[n] Indicates a note in notes.dat filemeta.notecharPtgNRT pointing IDmeta.id.part;meta.maincharf_PtgPointing footnote (G2)meta.codecharHRV-N? NRT heliocentric radial velocitykm/sspect.dopplerVeloc;pos.heliocentricintnullablee_HRV-N? Uncertainty in HRVkm/sstat.errorintnullableW50-N? NRT line width at 50% peak flux densitykm/sspect.line.widthintnullablee_W50-N? Uncertainty in W50km/sstat.errorintnullableW20-N? NRT line width at 20% peak flux densitykm/sspect.line.widthintnullablee_W20-N? Uncertainty in W20km/sstat.errorintnullableFHI-N? NRT HI flux integralJy.km/sphot.flux.density;em.radio.750-1500MHzfloatnullablee_FHI-N? Uncertainty in FHIJy.km/sstat.errorfloatnullableu_FHI-NUncertainty flag on flux (G8)meta.code.errorcharSNR-NNRT Peak signal to noise ratiostat.snrfloatvLG? Galaxy velocity vLG (G9)km/sphys.velocintnullableDist? Distance to the galaxy (based on vLG and H0=75km/s/Mpc)Mpcpos.distancefloatnullablelogMHI? Log HI masslog(solMass)phys.massfloatnullableu_logMHIUncertainty flag on HI mass (G8)meta.code.errorcharffinalFinal NRT flag (G7)meta.codecharCandFinal Classification of the cross-match candidate (G5)src.classchardbeamDistance between the NRT pointing position and the crossmatch (G10)beampos.angDistancefloatRACRight Ascension of counterpart (J2000) (G11)pos.eq.ra;meta.mainDECDeclination of counterpart (J2000) (G11)pos.eq.dec;meta.mainePosPositional uncertainty (G12)stat.error;poscharGLONGalactic longitude of counterpart position (G11)degpos.galactic.lonGLATGalactic latitude of of counterpart position (G11)degpos.galactic.latfloatFileNameName of the spectrum file in subdirectory spmeta.id;meta.filecharJ/A+A/695/A79/notesIndividual notesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEZOAID of the EZOA source (JHHMM-DD)meta.id;meta.maincharm_EZOA[B] Multiplicity index on EZOAmeta.code.multipcharNoteText of the notemeta.notechar