J/MNRAS/360/1305ivo://CDS.VizieR/J/MNRAS/360/1305doi:10.26093/cds/vizier.73601305CDSRoy S.Rao A.P.Subrahmanyan R.2024-07-01T20:14:47Z2006-07-08T15:33:49ZCDS support team

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

cds-question@unistra.frradio-sourcespolarimetryWe have observed a sample of 64 small-diameter sources towards the central -6<l<6, -2<b<2 of the Galaxy with the aim of studying the Faraday rotation measure near the Galactic Centre region. All the sources were observed at 6- and 3.6-cm wavelengths using the ATCA and the VLA. 59 of these sources are inferred to be extragalactic. The observations presented here constitute the first systematic study of the radio polarization properties of the background sources towards this direction and increase the number of known extragalactic radio sources in this part of the sky by almost an order of magnitude. Based on the morphology, spectral indices and lack of polarized emission, we identify four Galactic HII regions in the sample.2005MNRAS.360.1305Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/360/1305CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/6 : Polarization of Extragalactic Radio Sources (Eichendorf+ 1980)J/A+AS/39/379 : Linear Polarization of radio sources (Tabara+ 1980)J/A+AS/135/571 : Extragalactic radio sources polarization (Zukowski+, 1999)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/360/1305https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/360/1305http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/360/1305https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/360/1305https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/360/1305http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/360/1305GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/360/1305/param (Measured parameters of the observed sources)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/360/1305/param?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/360/1305/param?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/360/1305/param?GETtext/xml+votable180.050000true262.9874583-33.30947220.005555555555555556Cone search capability for table J/MNRAS/360/1305/table6 (Measured RM towards the background sources towards the GC region)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/360/1305/table6?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/360/1305/table6?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/360/1305/table6?GETtext/xml+votable180.050000true262.98083333-34.833305560.0055555555555555565/7206 7213 7219 7225 6/28803 28807-28810 28812-28814 28818-28819 28822 28828-28830 28833 28848-28849 28851 28866 28872-28873 28875 28890-28891 28897-28898 28914 42455https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/360/1305?format=asciiRadiodefaultJ/MNRAS/360/1305/table1Journal of observationsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintObsDateObservation datetime.epochnullableTelTelescopemeta.id;instr.telcharprimaryConfConfiguration of the telescopephys.atmol.configuration;instr.setupcharObs.TimeObservation timehtime.epochintFreq1Frequency of observationGHzem.freqfloatFreq2Frequency of observationGHzem.freqfloatNobsNumber of sources observedmeta.numberintJ/MNRAS/360/1305/paramMeasured parameters of the observed sourcesSI(1.4-0.3)? Spectral index between 1.4 and 0.3GHzspect.indexfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintpSimbad column added by the CDSmeta.notechar[RRS2005]Source name using Galactic coordinatesmeta.id;meta.maincharprimaryComp[NSECW EX R ] Component (1)meta.code.multipcharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainTelRadio telescope usedmeta.id;instr.telcharl_Smaj[~] Limit flag on deconvolved sizemeta.code.errorcharSmaj? Major axis of the deconvolved sizedegphys.angSizefloatnullableSmin? Minor axis of the deconvolved sizedegphys.angSizefloatnullablePA? Position angle of the deconvolved sizedegpos.posAngintnullablen_PA[*] *: size of the object measured from the 8.5-GHz map.meta.notecharSpeakPeak flux density at 4.8GHzmJyphot.flux.density;em.radio.3-6GHzfloatStotTotal flux density at 4.8GHzmJyphot.flux.density;em.radio.3-6GHzfloatn_Stot[ab] Note on Stot (2)meta.notecharSVLA? Total flux density of the component at 4.8GHz as measured by the VLA GPS surveymJyphot.flux.density;em.radio.3-6GHzfloatnullablePol? Percentage polarization%phys.polarizationfloatnullablel_SI(8.5-4.8)Limit flag on SI(8.5-4.8)meta.code.errorcharSI(8.5-4.8)? Spectral index between 8.5 and 4.8GHzspect.indexfloatnullablen_SI(8.5-4.8)[s] Note on SI(8.5-4.8) (3)meta.notecharSI(4.8-1.4)? Spectral index between 4.8 and 1.4GHzspect.indexfloatnullablen_SI(4.8-1.4)[i!NL* GM GC] Note on SI(4.8-1.4) (3)meta.notecharf_SI(1.4-0.3)[*] * = Spectral index from 0.3 to 4.8GHz in SI(4.8-1.4)meta.codecharn_SI(1.4-0.3)[i GM GC GM1] Note on SI(1.4-0.3) (3)meta.notecharClassSource classification (4)meta.code.classcharNameOther namemeta.idcharJ/MNRAS/360/1305/table6Measured RM towards the background sources towards the GC regionrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[RRS2005]Source name using Galactic coordinatesmeta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainRMRotation measurerad.m**-2phys.polarization.rotMeasureinte_RMrms uncertainty on RMrad.m**-2stat.errorfloatD? Depolarization fraction between 4.8 and 8.5GHz (1)phys.polarizationfloatnullablee_D? Percentage error in D%stat.errorfloatnullablethetaDirection of the magnetic fieldphys.magField;pos.dirCosfloate_thetarms uncertainty on thetastat.error;pos.posAngfloatchi2Reduced Chi^2^ valuestat.fit.chi2floatFreq1Observed frequencyMHzem.freqintPA1[-90/90] Measured polarisation angle at Freq1degphys.polarizationfloate_PA1rms uncertainty in deg PA1degstat.errorfloatFreq2Observed frequencyMHzem.freqintPA2[-90/90] Measured polarisation angle at Freq2degphys.polarizationfloate_PA2rms uncertainty in deg PA2degstat.errorfloatFreq3Observed frequencyMHzem.freqintPA3[-90/90] Measured polarisation angle at Freq3degphys.polarizationfloate_PA3rms uncertainty in deg PA3degstat.errorfloatFreq4Observed frequencyMHzem.freqintPA4[-90/94] Measured polarisation angle at Freq4degphys.polarizationfloate_PA4rms uncertainty in deg PA4degstat.errorfloatFreq5? Observed frequencyMHzem.freqintnullablePA5[-90/90]? Measured polarisation angle at Freq5degphys.polarizationfloatnullablee_PA5? rms uncertainty in deg PA5degstat.errorfloatnullableFreq6? Observed frequencyMHzem.freqintnullablePA6[-95/90]? Measured polarisation angle at Freq6degphys.polarizationfloatnullablee_PA6? rms uncertainty in deg PA6degstat.errorfloatnullableNameOther namemeta.idchar