<?xml-stylesheet href='/static/xsl/oai.xsl' type='text/xsl'?>
<ri:Resource created="2004-03-14T21:35:57Z" status="active" updated="2025-05-19T09:50:00Z" version="1.2" xmlns:cs="http://www.ivoa.net/xml/ConeSearch/v1.0" xmlns:ri="http://www.ivoa.net/xml/RegistryInterface/v1.0" xmlns:vr="http://www.ivoa.net/xml/VOResource/v1.0" xmlns:vs="http://www.ivoa.net/xml/VODataService/v1.1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.ivoa.net/xml/ConeSearch/v1.0 http://vo.ari.uni-heidelberg.de/docs/schemata/ConeSearch.xsd http://www.ivoa.net/xml/VOResource/v1.0 http://vo.ari.uni-heidelberg.de/docs/schemata/VOResource.xsd http://www.ivoa.net/xml/VODataService/v1.1 http://vo.ari.uni-heidelberg.de/docs/schemata/VODataService.xsd" xsi:type="vs:CatalogService"><title>Polarisation of 404 radio sources at 6 and 20cm</title><shortName>J/AJ/87/859</shortName><identifier>ivo://CDS.VizieR/J/AJ/87/859</identifier><altIdentifier>doi:10.26093/cds/vizier.50870859</altIdentifier><curation><publisher ivo-id="ivo://CDS">CDS</publisher><creator><name>Perley R.A.</name></creator><date role="Updated">2012-11-13T12:58:08Z</date><date role="Created">2004-03-14T21:35:57Z</date><contact><name>CDS support team</name><address>CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France</address><email>cds-question@unistra.fr</email></contact></curation><content><subject>radio-sources</subject><subject>polarimetry</subject><description>Accurate positions of 404 compact radio sources used as calibrators by the VLA are presented. In addition, the structure and polarization of each source at both 4885 and 1465MHz are given. Eighty-five percent of the sources have spectral indices flatter than 0.5; all of these are dominated by an unresolved core. Half of these flat-spectrum sources contain nearby, associated diffuse structure at a level exceeding approximately 0.4% of the core brightness at 20cm.</description><source format="bibcode">1982AJ.....87..859P</source><referenceURL>https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/87/859</referenceURL><type>Catalog</type><contentLevel>Research</contentLevel><relationship><relationshipType>IsServedBy</relationshipType><relatedResource ivo-id="ivo://CDS.VizieR/TAP">TAP VizieR generic service</relatedResource></relationship><relationship><relationshipType>IsServedBy</relationshipType><relatedResource>Conesearch service</relatedResource></relationship></content><rights>https://cds.unistra.fr/vizier-org/licences_vizier.html</rights><capability><interface xsi:type="vr:WebBrowser"><accessURL use="full">https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/87/859</accessURL><mirrorURL title="VizieR at IUCAA: Pune, India">https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/87/859</mirrorURL><mirrorURL title="VizieR at SAAO: SAAO, South Africa">http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/87/859</mirrorURL></interface></capability><capability><interface xsi:type="vs:ParamHTTP"><accessURL use="base">https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/87/859</accessURL><mirrorURL title="VizieR at IUCAA: Pune, India">https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/87/859</mirrorURL><mirrorURL title="VizieR at SAAO: SAAO, South Africa">http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/87/859</mirrorURL><queryType>GET</queryType><resultType>text/xml+votable</resultType></interface></capability><capability standardID="ivo://ivoa.net/std/TAP#aux"><interface xsi:type="vs:ParamHTTP" role="std"><accessURL use="base">https://tapvizier.cds.unistra.fr/TAPVizieR/tap</accessURL></interface></capability><capability xsi:type="cs:ConeSearch" standardID="ivo://ivoa.net/std/ConeSearch"><description>Cone search capability for table J/AJ/87/859/table2 (Positions, Structures and Polarization of 404 Compact Radio Sources)</description><interface xsi:type="vs:ParamHTTP" role="std"><accessURL use="base">https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/87/859/table2?</accessURL><mirrorURL title="VizieR at IUCAA: Pune, India">https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/87/859/table2?</mirrorURL><mirrorURL title="VizieR at SAAO: SAAO, South Africa">http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/87/859/table2?</mirrorURL><queryType>GET</queryType><resultType>text/xml+votable</resultType></interface><maxSR>180.0</maxSR><maxRecords>50000</maxRecords><verbosity>true</verbosity><testQuery><ra>1.55788185</ra><dec>-6.39311378</dec><sr>0.005555555555555556</sr></testQuery></capability><coverage><spatial>6/18 80 124 180 375 392 421 532 556 579 677 700 911 1025 1154 1450 1521 1546 1701 1782 1831 1875 2087 2143 2207 2214 2245 2397 2600 2631 2836 2927 3402 3675 3820 3886 3971 4054 4572 4695 4696 4754 4770 4820 4992 5306 5353 5458 5546 5597 5693 5767 5817 5848 5974 6067 6164 6175 6252 6264 6268 6377 6448 6507 6641 6751 6853 6948 7129 7148 7181 7296 7345 7346 7351 7371 7389 7426 7570 7653 7839 7857 7882 7896 7937 7969 8031 8057 8123 8299 8345 8365 8466 8487 8717 8773 8830 8858 8977 9003 9204 9347 9403 9442 9460 9512 9545 9588 9632 9633 9655 9676 9723 9813 9976 9998 10163 10186 10288 10321 10432 10440 10466 10511 10695 10983 11094 11279 11407 11430 11502 11551 11639 11640 11714 11715 11806 11845 11876 11927 11973 12091 12173 12209 12218 12241 12276 12301 12352 12444 12475 12580 12599 13410 13496 13789 13927 14338 14520 14737 14842 15023 15286 15494 15819 15936 16027 16059 16093 16170 16281 16298 16509 16720 16722 16962 17019 17184 17351 17516 17541 17579 17734 17791 17857 17909 17979 18002 18005 18022 18035 18037 18096 18214 18242 18271 18378 18506 18624 18669 18907 19088 19101 19166 19177 19190 19271 19308 19327 19370 19398 19413 19523 19609 19629 19831 19872 19918 19970 20099 20213 20358 20657 20725 20935 21012 21049 21121 21163 21196 21266 21358 21373 21437 21508 21564 21713 21758 21924 21935 21960 21968 22375 22396 22894 22943 22950 22965 23099 23121 23127 23304 23323 23364 23416 23478 23691 24084 24116 24165 24571 24608 24615 24809 24814 24936 25016 25112 25131 25256 25302 25428 25503 25630 25742 25990 26000 26115 26131 26292 26301 26363 26491 26642 26769 26900 26966 27060 27138 27212 27220 27290 27310 27909 28167 28184 28216 28311 28339 28383 28453 28454 28479 28492 28628 28818 28897 29016 29218 29570 29675 29714 29795 29963 30542 31154 31190 31211 31334 31391 31424 31430 31451 31535 31664 31696 31857 31894 31930 32247 32311 32325 32454 32594 32608 32660 34123 34210 34461 34517 34571 34572 34675 34699 35440 35482 35491 35651 35786 35801 36155 36188 36417 36554 36785 38277 38474 38763 38800 39377 39664 39848 40060 40344 40479 40527 40730 42901 42980 43257 43822 43936 44043 44147 44247 44523 44658 44776 44805 44908 45011 46764 46851 46921 47016 47080 47419 47534 47540 47849 47941 48023 48320 48362 48496 48529 48589 48595 48610 48757 48798 48846 48965</spatial><spectral>9.700565762463354e-25 3.2368351367541597e-24</spectral><footprint ivo-id="ivo://ivoa.net/std/moc">https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/87/859?format=ascii</footprint><waveband>Radio</waveband></coverage><tableset><schema><name>default</name><table><name>J/AJ/87/859/table2</name><description>Positions, Structures and Polarization of 404 Compact Radio Sources</description><column><name>AName</name><description>Alternative name (3C, 4C) (1)</description><ucd>meta.id</ucd><dataType xsi:type="vs:VOTableType" arraysize="8*">char</dataType></column><column><name>recno</name><description>Record number assigned by the VizieR team. Should Not be used for identification.</description><ucd>meta.record</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>Name</name><description>IAU name, based on 1950 position</description><ucd>meta.id;meta.main</ucd><dataType xsi:type="vs:VOTableType" arraysize="8*">char</dataType></column><column><name>RA1950</name><description>Right ascension (1950.0)</description><ucd>pos.eq.ra;meta.main</ucd></column><column><name>DE1950</name><description>Declination (1950.0)</description><ucd>pos.eq.dec;meta.main</ucd></column><column><name>S6cm</name><description>Flux density at 6cm (4885MHz) (2)</description><unit>Jy</unit><ucd>phot.flux.density;em.radio.3-6GHz</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>u_S6cm</name><description>Uncertainty flag on S6cm</description><ucd>meta.code.error</ucd><dataType xsi:type="vs:VOTableType" arraysize="1*">char</dataType></column><column><name>S20cm</name><description>Flux density at 20cm (1464MHz) (2)</description><unit>Jy</unit><ucd>phot.flux.density;em.radio.750-1500MHz</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>u_S20cm</name><description>Uncertainty flag on S20cm</description><ucd>meta.code.error</ucd><dataType xsi:type="vs:VOTableType" arraysize="1*">char</dataType></column><column><name>Sp-Index</name><description>Spectral index alpha^20^_6_</description><ucd>spect.index</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>u_Sp-Index</name><description>Uncertainty flag on Sp+Index</description><ucd>meta.code.error</ucd><dataType xsi:type="vs:VOTableType" arraysize="1*">char</dataType></column><column><name>pS6cm</name><description>? Polarized flux at 6cm (4885MHz) (3)</description><unit>mJy</unit><ucd>phot.flux.density;em.radio.3-6GHz</ucd><dataType xsi:type="vs:VOTableType">int</dataType><flag>nullable</flag></column><column><name>u_pS6cm</name><description>Uncertainty flag on pS6cm</description><ucd>meta.code.error</ucd><dataType xsi:type="vs:VOTableType" arraysize="1*">char</dataType></column><column><name>PA6cm</name><description>? Position angle of polarized flux at 6cm (3)</description><unit>deg</unit><ucd>pos.posAng;phys.polarization</ucd><dataType xsi:type="vs:VOTableType">int</dataType><flag>nullable</flag></column><column><name>u_PA6cm</name><description>Uncertainty flag on PA6cm</description><ucd>meta.code.error</ucd><dataType xsi:type="vs:VOTableType" arraysize="1*">char</dataType></column><column><name>dp6cm</name><description>? Degree of polarized flux at 6cm (4885MHz)</description><unit>%</unit><ucd>phot.flux;em.radio.3-6GHz</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>u_dp6cm</name><description>Uncertainty flag on dp6cm</description><ucd>meta.code.error</ucd><dataType xsi:type="vs:VOTableType" arraysize="1*">char</dataType></column><column><name>pS20cm</name><description>? Polarized flux at 20cm (3)</description><unit>mJy</unit><ucd>phot.flux.density</ucd><dataType xsi:type="vs:VOTableType">int</dataType><flag>nullable</flag></column><column><name>PA20cm</name><description>? Position angle of polarized flux at 20cm (3)</description><unit>deg</unit><ucd>pos.posAng;phys.polarization</ucd><dataType xsi:type="vs:VOTableType">int</dataType><flag>nullable</flag></column><column><name>dp20cm</name><description>? Degree of polarized flux at 20cm (1465MHz)</description><unit>%</unit><ucd>phot.flux;em.radio.750-1500MHz</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>l_B6cmu</name><description>Limit flag on B6cmu</description><ucd>meta.code.error</ucd><dataType xsi:type="vs:VOTableType" arraysize="1*">char</dataType></column><column><name>B6cmu</name><description>? Upper limit (as % of peak) of the peak brightness of secondary structure, at 6cm</description><unit>%</unit><ucd>phot.flux;arith.ratio</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>n_B6cmu</name><description>[*] *: source slightly resolved</description><ucd>meta.note</ucd><dataType xsi:type="vs:VOTableType" arraysize="1*">char</dataType></column><column><name>B6cm</name><description>? Peak brightness of secondary structure, at 6cm (4)</description><ucd>phot.flux;arith.ratio</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>n_B6cm</name><description>[*] *: source slightly resolved</description><ucd>meta.note</ucd><dataType xsi:type="vs:VOTableType" arraysize="1*">char</dataType></column><column><name>l_B20cmu</name><description>Limit flag on B20cmu</description><ucd>meta.code.error</ucd><dataType xsi:type="vs:VOTableType" arraysize="1*">char</dataType></column><column><name>B20cmu</name><description>? Upper limit (as % of peak) of peak brightness of secondary structure, at 20cm (4)</description><unit>%</unit><ucd>phot.flux;arith.ratio</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>n_B20cmu</name><description>[*] *: source slightly resolved</description><ucd>meta.note</ucd><dataType xsi:type="vs:VOTableType" arraysize="1*">char</dataType></column><column><name>B20cm</name><description>? Peak brightness of secondary structure, at 20cm (4)</description><ucd>phot.flux;arith.ratio</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>n_B20cm</name><description>[*] *: source slightly resolved</description><ucd>meta.note</ucd><dataType xsi:type="vs:VOTableType" arraysize="1*">char</dataType></column><column><name>OID</name><description>[QG BL EF?] Optical identification (5)</description><ucd>src.class</ucd><dataType xsi:type="vs:VOTableType" arraysize="2*">char</dataType></column><column><name>Vmag</name><description>? Visual magnitude of optical identification</description><unit>mag</unit><ucd>phot.mag;em.opt.V</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>z</name><description>? Redshift</description><ucd>src.redshift</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>n_OID</name><description>[+] +: optical ID from Hewitt and Burbidge, 1980ApJS...43...57H</description><ucd>meta.note</ucd><dataType xsi:type="vs:VOTableType" arraysize="1*">char</dataType></column><column><name>Note</name><description>[*] *: Note detailed in notes.dat file</description><ucd>meta.note</ucd><dataType xsi:type="vs:VOTableType" arraysize="1*">char</dataType></column><column><name>_RA.icrs</name><description>Right ascension (ICRS) (computed by VizieR, not part of the original data)</description><ucd>pos.eq.ra</ucd><flag>nullable</flag><flag>indexed</flag></column><column><name>_DE.icrs</name><description>Declination (ICRS) (computed by VizieR, not part of the original data)</description><ucd>pos.eq.dec</ucd><flag>nullable</flag><flag>indexed</flag></column></table><table><name>J/AJ/87/859/notes</name><description>Individual notes (table3 of paper)</description><column><name>Note</name><description>Text of the note</description><ucd>meta.note</ucd><dataType xsi:type="vs:VOTableType" arraysize="71*">char</dataType></column><column><name>recno</name><description>Record number assigned by the VizieR team. Should Not be used for identification.</description><ucd>meta.record</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>Name</name><description>Name</description><ucd>meta.id;meta.main</ucd><dataType xsi:type="vs:VOTableType" arraysize="8*">char</dataType></column></table></schema></tableset></ri:Resource>