J/MNRAS/325/1411ivo://CDS.VizieR/J/MNRAS/325/1411doi:10.26093/cds/vizier.73251411CDSKedziora-Chudczer L.L.Jauncey D.L.Wieringa M.H.Tzioumis A.K.,Reynolds J.E.2024-06-27T20:17:27Z2006-04-07T21:08:12ZCDS support team

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

cds-question@unistra.frradio-sourcespolarimetryWe present the results of an Australia Telescope Compact Array (ATCA) survey for intraday variability (IDV) of the total and polarized flux densities of 118 compact, flat-spectrum, extragalactic radio sources from the Parkes 2.7-GHz Survey. A total of 22 total flux density IDV sources were discovered and 15 sources were found to show IDV of their polarized flux density. We discuss the statistical properties of the IDV sources, including the distribution of source modulation indices, and the dependence of the variability amplitude on source spectral index and on Galactic position. We suggest interstellar scintillation (ISS) in the Galactic interstellar medium as the most likely mechanism for IDV. Even so, the inferred high brightness temperatures cannot be easily explained.2001MNRAS.325.1411Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/325/1411CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/other/PASAu/10.310 : Parkes-Tidbinbilla radio sources (Duncan+ 1993)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/325/1411https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/325/1411http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/325/1411https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/325/1411https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/325/1411http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/325/1411GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/325/1411/table3 (Averaged total flux densities and the modulation indices for the intraday variability sources.)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/325/1411/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/325/1411/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/325/1411/table3?GETtext/xml+votable180.050000true1.5578869-6.39314860.005555555555555556Cone search capability for table J/MNRAS/325/1411/table4 (Average polarized flux densities, modulation indices of linear polarization and average position angle of the polarized flux)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/325/1411/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/325/1411/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/325/1411/table4?GETtext/xml+votable180.050000true1.5578869-6.39314860.0055555555555555566/8199 12352 17184 17351 17857 18005 18084 18242 18506 18718 18766 19101 20657 20935 21012 21163 21266 21508 21564 21885 21935 21960 21972 22950 22965 23014 23099 23121 23127 24608 24809 24906 25302 25332 25630 25864 25990 26000 26115 26642 26966 27220 29675 29795 31383 32808 32841 33549 33560 33626 33684 33711 33829 34012 34038 34123 34330 34428 34572 34871 34931 35294 35432 35440 35651 35706 36100 36554 36941 37201 37217 38734 38763 39664 39740 39848 40527 40990 41059 41072 41275 41310 42901 43936 44147 44310 44502 44614 44661 44776 44805 45110 45158 45178 45695 45795 46174 46337 46373 46459 46588 46764 46921 47014 47016 47106 47268 48023 48320 48610 48798 489659.276497240453405e-25 5.6984200832293834e-24https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/325/1411?format=asciiRadiodefaultJ/MNRAS/325/1411/table3Averaged total flux densities and the modulation indices for the intraday variability sources.recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameSource namemeta.id;meta.maincharprimaryN8.6GHz1? Number of data points included in average at 8.6GHz on May 1994meta.numberintnullableS8.6GHz1? Average total flux density at 8.6GHz on May 1994Jyphot.flux.density;em.radio.6-12GHzfloatnullablemuS8.6GHz1? Modulation index on S8.6GHz1src.var.indexfloatnullableN8.6GHz2? Number of data points included in average at 8.6GHz on August 1994meta.numberintnullableS8.6GHz2? Average total flux density at 8.6GHz on August 1994Jyphot.flux.density;em.radio.6-12GHzfloatnullablemuS8.6GHz2? Modulation index on S8.6GHz2src.var.indexfloatnullableN4.8GHz1? Number of data points included in average at 4.8GHz on May 1994meta.numberintnullableS4.8GHz1? Average total flux density at 4.8GHz on May 1994Jyphot.flux.density;em.radio.3-6GHzfloatnullablemuS4.8GHz1? Modulation index on S4.8GHz1src.var.indexfloatnullableN4.8GHz2? Number of data points included in average at 4.8GHz on August 1994meta.numberintnullableS4.8GHz2? Average total flux density at 4.8GHz on August 1994Jyphot.flux.density;em.radio.3-6GHzfloatnullablemuS4.8GHz2? Modulation index on S4.8GHz2src.var.indexfloatnullableN2.4GHz1? Number of data points included in average at 2.4GHz on May 1994meta.numberintnullableS2.4GHz1? Average total flux density at 2.4GHz on May 1994Jyphot.flux.density;em.radio.1500-3000MHzfloatnullablemuS2.4GHz1? Modulation index on S2.4GHz1src.var.indexfloatnullableN2.4GHz2? Number of data points included in average at 2.4GHz on August 1994meta.numberintnullableS2.4GHz2? Average total flux density at 2.4GHz on August 1994Jyphot.flux.density;em.radio.1500-3000MHzfloatnullablemuS2.4GHz2? Modulation index on S2.4GHz2src.var.indexfloatnullableN1.4GHz1? Number of data points included in average at 1.4GHz on May 1994meta.numberintnullableS1.4GHz1? Average total flux density at 1.4GHz on May 1994Jyphot.flux.density;em.radio.750-1500MHzfloatnullablemuS1.4GHz1? Modulation index on S1.4GHz1src.var.indexfloatnullableN1.4GHz2? Number of data points included in average at 1.4GHz on August 1994meta.numberintnullableS1.4GHz2? Average total flux density at 1.4GHz on August 1994Jyphot.flux.density;em.radio.750-1500MHzfloatnullablemuS1.4GHz2? Modulation index on S1.4GHz2src.var.indexfloatnullableSimbadNameSimbad column added by the CDSmeta.idchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainJ/MNRAS/325/1411/table4Average polarized flux densities, modulation indices of linear polarization and average position angle of the polarized fluxrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameSource namemeta.id;meta.maincharN8.6GHz1? Number of data points included in average at 8.6GHz on May 1994meta.numberintnullableP8.6GHz1? Average polarized flux density at 8.6GHz on May 1994mJyphot.flux.density;em.radio.6-12GHzintnullablemuP8.6GHz1? Modulation index on P8.6GHz1src.var.indexfloatnullablePA8.6GHz1[-90/90]? Average position angle of the polarized flux at 8.6GHz on May 1994degpos.posAng;stat.meanfloatnullableN8.6GHz2? Number of data points included in average at 8.6GHz on August 1994meta.numberintnullableP8.6GHz2? Average polarized flux density at 8.6GHz on August 1994mJyphot.flux.density;em.radio.6-12GHzintnullablemuP8.6GHz2? Modulation index on P8.6GHz2src.var.indexfloatnullablePA8.6GHz2[-90/90]? Average position angle of the polarized flux at 8.6GHz on August 1994degpos.posAng;stat.meanfloatnullableN4.8GHz1? Number of data points included in average at 4.8GHz on May 1994meta.numberintnullableP4.8GHz1? Average polarized flux density at 4.8GHz on May 1994mJyphot.flux.density;em.radio.3-6GHzintnullablemuP4.8GHz1? Modulation index on P4.8GHz1src.var.indexfloatnullablePA4.8GHz1[-90/90]? Average position angle of the polarized flux at 4.8GHz on May 1994degpos.posAng;stat.meanfloatnullableN4.8GHz2? Number of data points included in average at 4.8GHz on August 1994meta.numberintnullableP4.8GHz2? Average polarized flux density at 4.8GHz on August 1994mJyphot.flux.density;em.radio.3-6GHzintnullablemuP4.8GHz2? Modulation index on P4.8GHz2src.var.indexfloatnullablePA4.8GHz2[-90/90]? Average position angle of the polarized flux at 4.8GHz on August 1994degpos.posAng;stat.meanfloatnullableN2.4GHz1? Number of data points included in average at 2.4GHz on May 1994meta.numberintnullableP2.4GHz1? Average polarized flux density at 2.4GHz on May 1994mJyphot.flux.density;em.radio.1500-3000MHzintnullablemuP2.4GHz1? Modulation index on P2.4GHz1src.var.indexfloatnullablePA2.4GHz1[-90/90]? Average position angle of the polarized flux at 2.4GHz on May 1994degpos.posAng;stat.meanfloatnullableN2.4GHz2? Number of data points included in average at 2.4GHz on August 1994meta.numberintnullableP2.4GHz2? Average polarized flux density at 2.4GHz on August 1994mJyphot.flux.density;em.radio.1500-3000MHzintnullablemuP2.4GHz2? Modulation index on P2.4GHz2src.var.indexfloatnullablePA2.4GHz2[-90/90]? Average position angle of the polarized flux at 2.4GHz on August 1994degpos.posAng;stat.meanfloatnullableN1.4GHz1? Number of data points included in average at 1.4GHz on May 1994meta.numberintnullableP1.4GHz1? Average polarized flux density at 1.4GHz on May 1994mJyphot.flux.density;em.radio.750-1500MHzintnullablemuP1.4GHz1? Modulation index on P1.4GHz1src.var.indexfloatnullablePA1.4GHz1[-90/90]? Average position angle of the polarized flux at 1.4GHz on May 1994degpos.posAng;stat.meanfloatnullableN1.4GHz2? Number of data points included in average at 1.4GHz on August 1994meta.numberintnullableP1.4GHz2? Average polarized flux density at 1.4GHz on August 1994mJyphot.flux.density;em.radio.750-1500MHzintnullablemuP1.4GHz2? Modulation index on P1.4GHz2src.var.indexfloatnullablePA1.4GHz2[-90/90]? Average position angle of the polarized flux at 1.4GHz on August 1994degpos.posAng;stat.meanfloatnullableSimbadNameSimbad column added by the CDSmeta.idchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.main