J/ApJS/177/515ivo://CDS.VizieR/J/ApJS/177/515doi:10.26093/cds/vizier.21770515CDSLaw C.J.Yusef-Zadeh F.Cotton W.D.2017-09-27T05:55:44Z2009-10-28T16:29:46ZCDS support team

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

cds-question@unistra.frradio-continuum-emissionsurveysradio-sourcesWe describe the results of a millijansky sensitivity VLA survey of roughly 1deg^2^ near the Galactic center at 6 and 20cm. Catalogs of compact and filamentary structures are given and compared to previous surveys of the region. Eight of the unusual nonthermal radio filaments are detected in 6cm polarized emission; three of these are the first such detections, confirming their nonthermal nature. This survey found emission from a filament at (l,b)=(359.1,0.75), or a projected distance from Sgr A* of 200pc, greatly extending the latitude range observed with such features. There is also new evidence for spatial gradients in the 6/20cm spectral indices of some filaments, and we discuss models for these gradients. In studying compact sources, the combination of spectral index and polarization information allows us to identify pulsar candidates and compact HII regions in the survey. There is also some evidence that the flux measurements of compact sources may be affected by electron scattering from the interstellar medium in the central few hundred parsecs of the Galaxy.2008ApJS..177..515Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/177/515CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJS/91/347 : A 5-GHz VLA Survey of the Galactic Plane (Becker+ 1994)J/ApJS/118/201 : Galactic Center 6 and 20cm survey (Lazio+, 1998)J/ApJS/155/421 : Survey of Galactic Center region at 20cm (Yusef-Zadeh+, 2004)J/ApJS/174/481 : 2LC Compact Radio Sources in the galactic center (Lazio+ 2008)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/177/515https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/177/515http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/177/515https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/177/515https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/177/515http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/177/515GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/177/515/table4 (*Compact sources in 6cm survey)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/177/515/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/177/515/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/177/515/table4?GETtext/xml+votable180.050000true265.533-29.31441670.005555555555555556Cone search capability for table J/ApJS/177/515/table5 (*Compact sources in 20cm survey)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/177/515/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/177/515/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/177/515/table5?GETtext/xml+votable180.050000true266.2031667-28.47080560.005555555555555556Cone search capability for table J/ApJS/177/515/table67 (Point sources with 6 and 20cm polarization (table 6 and 7 of the paper))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/177/515/table67?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/177/515/table67?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/177/515/table67?GETtext/xml+votable180.050000true265.2303333-29.17363890.005555555555555556Cone search capability for table J/ApJS/177/515/table8 (*Compact sources in both 6 and 20cm catalogs)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/177/515/table8?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/177/515/table8?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/177/515/table8?GETtext/xml+votable180.050000true265.533-29.31441670.005555555555555556Cone search capability for table J/ApJS/177/515/match (Sources matching other catalogs)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/177/515/match?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/177/515/match?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/177/515/match?GETtext/xml+votable180.050000true266.1700833-28.66544440.0055555555555555566/28826 28827 28830 28848 28849 28852 32658 32664https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/177/515?format=asciiRadiodefaultJ/ApJS/177/515/table4*Compact sources in 6cm surveyrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Hour of right ascension (J2000) (1)pos.eq.ra;meta.mainDEJ2000Degree of declination (J2000)pos.eq.dec;meta.mainn_FpSimbad column added by the CDSmeta.notecharFpPeak flux in mJy/beam at 6 or 20cmmJyphot.flux.density;em.radio.3-6GHzfloatf_Fp[b] Assumed source size (G2)meta.codechare_FpError on peak flux in mJy/beammJystat.errorfloatFSiIntegrated fluxmJyphot.flux.density;em.radio.3-6GHzfloate_FSiError on FSi at 6 or 20cmmJystat.errorfloatMajMajor axis of the sourcearcsecphys.angSizefloatMinMinor axis of the sourcearcsecphys.angSize.sminAxisfloatPA[-180/180] Position angle of the source (3)degpos.posAngfloatalphaspectral index in the sense S_{nu}_{prop.to}{nu}^{alpha}^spect.indexfloatnullablee_alphaMean error on alphastat.errorfloatnullableAllShow all properties of the 6/20cm sourcesmeta.ref.urlcharJ/ApJS/177/515/table5*Compact sources in 20cm surveyrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Hour of right ascension (J2000) (1)pos.eq.ra;meta.mainDEJ2000Degree of declination (J2000)pos.eq.dec;meta.mainn_FpSimbad column added by the CDSmeta.notecharFpPeak flux in mJy/beam at 6 or 20cmmJyphot.flux.density;em.radio.1500-3000MHzfloatf_Fp[b] Assumed source size (G2)meta.codechare_FpError on peak flux in mJy/beammJystat.errorfloatFSiIntegrated fluxmJyphot.flux.density;em.radio.1500-3000MHzfloate_FSiError on FSi at 6 or 20cmmJystat.errorfloatMajMajor axis of the sourcearcsecphys.angSizefloatMinMinor axis of the sourcearcsecphys.angSize.sminAxisfloatPA[-180/180] Position angle of the source (3)degpos.posAngfloatAllShow all properties of the 6/20cm sourcesmeta.ref.urlcharJ/ApJS/177/515/table67Point sources with 6 and 20cm polarization (table 6 and 7 of the paper)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of declination (J2000)pos.eq.dec;meta.maincmWavelength (6 or 20)cmem.wlintFSiIntegrated flux at 6 or 20cmmJyphot.flux.density;em.radiofloate_FSiError on FSimJystat.errorfloatFPSiIntegrated polarized flux at 6 or 20cmmJyphot.flux.densityfloatf_FPSi[b] Assumed source size (G2)meta.codechare_FPSiError on FPSimJystat.errorfloatFpolPolarization fractionphys.polarizationfloate_FpolError on Fpolstat.errorfloatAllShow all properties of the 6/20cm sourcesmeta.ref.urlcharJ/ApJS/177/515/table8*Compact sources in both 6 and 20cm catalogsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ20006cm source hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ20006cm source degree of declination (J2000)pos.eq.dec;meta.mainRA220cm source hour of right ascension (J2000)pos.eq.raDE220cm source degree of declination (J2000)pos.eq.decalpha6/20cm spectral index from the integrated flux of the source (G1)spect.indexfloate_alphaError on 6/20cm spectral indexstat.error;pos.eq.rafloatAllShow all properties of the 6/20cm sourcesmeta.ref.urlcharJ/ApJS/177/515/matchSources matching other catalogsRefNumber of original table in the paper (2)meta.ref;pos.frameintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Hour of right ascension (J2000) (1)pos.eq.ra;meta.mainD[a] two sources unresolved in Becker et al. (1994, Cat. <J/ApJS/91/347>)meta.codecharDEJ2000Degree of declination (J2000)pos.eq.dec;meta.mainFSiIntegrated flux at 6 or 20cm (1)mJyphot.flux.density;em.radiofloate_FSiError on FSimJystat.errorfloatNamePrevious name of the source in the catalog from Refmeta.id;meta.maincharFSIntegrated flux at 6 or 20cm from RefmJyphot.flux.density;em.IR.4-8umfloate_FS? Error on FSmJystat.errorfloatnullableFS1281? Integrated flux measured in the second band from RefmJyphot.flux.density;em.radiofloatnullableAllShow all properties of the 6/20cm sourcesmeta.ref.urlchar