J/AJ/137/3869ivo://CDS.VizieR/J/AJ/137/3869doi:10.26093/cds/vizier.51373869CDSChomiuk L.Wilcots E.M.2017-06-26T11:50:38Z2011-11-01T16:48:36ZCDS support team

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

cds-question@unistra.frsupernova-remnantsradio-sourcesgalaxy-classification-systemsWe survey four nearby irregular galaxies for radio supernova remnants (SNRs) using deep (1{sigma}~20uJy), high-resolution (~20pc) Very Large Array continuum data at 20, 6, and 3.6cm. We identify discrete sources in these galaxies and use radio spectral indices and H{alpha} images to categorize them as SNRs, HII regions, or background radio galaxies. Our classifications are generally in good agreement with the literature. We identify a total of 43 SNR candidates: 23 in NGC 1569, seven in NGC 4214, five in NGC 2366, and eight in NGC 4449. Only one SNR - the well-studied object J1228+441 in NGC 4449 - is more luminous at 20cm than Cas A. By comparing the total thermal flux density in each galaxy with that localized in HII regions, we conclude that a significant fraction must be in a diffuse component or in low-luminosity HII regions.2009AJ....137.3869Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/137/3869CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/137/3869https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/137/3869http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/137/3869https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/137/3869https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/137/3869http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/137/3869GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/137/3869/sources (Radio sources at 20cm in the galaxies NGC 1569, 2366, 4214, 4449)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/137/3869/sources?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/137/3869/sources?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/137/3869/sources?GETtext/xml+votable180.050000true67.5062564.88147220.0055555555555555566/3389 7876 7878 10911 286319.939104355462015e-25 5.517905791682326e-24https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/137/3869?format=asciiOpticalRadiodefaultJ/AJ/137/3869/sourcesRadio sources at 20cm in the galaxies NGC 1569, 2366, 4214, 4449recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[CW2009]Source name, N1569-NN, N4214-NN, N2366-NN, or N4449-NNmeta.id;meta.maincharn_[CW2009][*] Variable source (1)meta.notecharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainamajMajor axisarcsecphys.angSizefloataminMinor axisarcsecphys.angSize;srcfloatS20cmFlux density at 20cm (1.5GHz)mJyphot.flux.density;em.radio.1500-3000MHzfloate_S20cmrms uncertainty on S20cmmJystat.errorfloatl_S6cmLimit flag on S6cm (5GHz)meta.code.errorcharS6cmFlux density at 6cmmJyphot.flux.density;em.radio.3-6GHzfloate_S6cm? rms uncertainty on S6cmmJystat.errorfloatnullablel_S3.6cmLimit flag on S3.6cm (8.3GHz)meta.code.errorcharS3.6cm? Flux density at 3.6cmmJyphot.flux.density;em.radio.6-12GHzfloatnullablee_S3.6cm? rms uncertainty on S3.6cmmJystat.errorfloatnullablel_alphaLimit flag on alphameta.code.error;pos.eq.racharalphaSpectral index {alpha} [S{prop.to}nu^{alpha}^]spect.indexfloate_alpha? rms uncertainty on alphastat.error;pos.eq.rafloatnullableHa[Yes/No ] H{alpha} emission?meta.codecharClassClassification (2)meta.code.classcharn_Class[ab] Note (1)meta.notecharSEDPlot the spectrum with SPECFIND (Vollmer et al. 2009, Cat. VIII/85)meta.ref.urlchar