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<ri:Resource created="2002-08-14T08:00:06Z" status="active" updated="2025-05-19T09:50:00Z" version="1.2" 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/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>uvby photometry &amp; radial velocities of R 81</title><shortName>J/A+A/389/931</shortName><identifier>ivo://CDS.VizieR/J/A+A/389/931</identifier><altIdentifier>doi:10.26093/cds/vizier.33890931</altIdentifier><curation><publisher ivo-id="ivo://CDS">CDS</publisher><creator><name>Tubbesing S.</name></creator><creator><name>Kaufer A.</name></creator><creator><name>Stahl O.</name></creator><creator><name>Wolf B.</name></creator><creator><name>Schmid H.M.</name></creator><creator><name>Korn A.J.,Maintz M.</name></creator><creator><name>Rivinius T.</name></creator><creator><name>Szeifert T.</name></creator><creator><name>Arentoft T.</name></creator><creator><name>Sterken C.</name></creator><date role="Updated">2002-08-14T08:00:14Z</date><date role="Created">2002-08-14T08:00:06Z</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>eclipsing-binary-stars</subject><subject>radial-velocity</subject><subject>visible-astronomy</subject><subject>medium-band-photometry</subject><description>File table1.dat contains the photometric uvby data of the eclipsing binary hypergiant R81 (B2.5 Ia-O) of the Large Magellanic Cloud. The data have been obtained with the Danish 50 cm telescope at ESO, La Silla, and cover more than one orbital cycle of 74.59 days. File table2.dat contains radial velocity measurements of photospheric lines of this star. The spectra have been obtained simultaneously with the photometry. The Feros spectrograph at the ESO 1.52m telescope was used. 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Should Not be used for identification.</description><ucd>meta.record</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>Date</name><description>Julian Date of Observation</description><unit>d</unit><ucd>time.epoch</ucd><dataType xsi:type="vs:VOTableType">double</dataType></column><column><name>ymag</name><description>Stroemgren y magnitude</description><unit>mag</unit><ucd>phot.mag;em.opt.V</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>b-y</name><description>Stroemgren b-y colour</description><unit>mag</unit><ucd>phot.color;em.opt.B;em.opt.V</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>m1</name><description>Stroemgren m1 colour</description><unit>mag</unit><ucd>phot.color</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>c1</name><description>Stroemgren c1 colour</description><unit>mag</unit><ucd>phot.color</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column></table><table><name>J/A+A/389/931/table2</name><description>Radial velocity measurements</description><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>Date</name><description>Julian Date of Observation</description><unit>d</unit><ucd>time.epoch</ucd><dataType xsi:type="vs:VOTableType">double</dataType></column><column><name>HRV</name><description>Heliocentric radial velocity</description><unit>km/s</unit><ucd>phys.veloc;pos.heliocentric</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column></table></schema></tableset></ri:Resource>