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<ri:Resource created="2001-05-11T19:48:39Z" 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>CCD speckle obs. of binary stars. II.</title><shortName>J/AJ/120/2638</shortName><identifier>ivo://CDS.VizieR/J/AJ/120/2638</identifier><altIdentifier>doi:10.26093/cds/vizier.51202638</altIdentifier><curation><publisher ivo-id="ivo://CDS">CDS</publisher><creator><name>Horch E.</name></creator><creator><name>Franz O.G.</name></creator><creator><name>Ninkov Z.</name></creator><date role="Updated">2023-04-06T16:50:40Z</date><date role="Created">2001-05-11T19:48:39Z</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>multiple-stars</subject><subject>interferometry</subject><description>Speckle observations of 145 double stars and suspected double stars are presented and discussed. On the basis of multiple observations, a total of 280 position angle and separation measures are determined, as well as 23 high-quality nondetections. All observations were taken with the (unintensified) Rochester Institute of Technology fast-readout CCD camera mounted on the Lowell-Tololo 61 cm telescope at the Cerro Tololo Inter-American Observatory during 1999 October. We find that the measures, when judged as a whole against ephemeris positions of binaries with very well-known orbits, have root mean square deviations of 18+/-03{deg} in position angle and 13+/-2mas in separation. Eleven double stars discovered by Hipparcos were also successfully observed, and the change in position angle and/or separation since the Hipparcos observations was substantial in three cases.</description><source format="bibcode">2000AJ....120.2638H</source><referenceURL>https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/120/2638</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><relationship><relationshipType>related-to</relationshipType><relatedResource ivo-id="ivo://CDS.VizieR/VI/46">VI/46 : Second Catalog of Interferometric Measurements of Binary Stars</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/I/239">I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)</relatedResource><relatedResource>http://ad.usno.navy.mil/wds/ : Correspondance WDS/HDS/HIP numbers</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/A+AS/134/545">J/A+AS/134/545 : Double star measurements 1995-1997 (Aristidi+ 1999)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/AJ/106/352">J/AJ/106/352 : ICCD speckle obs. of binary stars. VIII (Hartkopf+ 1993)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/AJ/106/637">J/AJ/106/637 : ICCD speckle obs. of binary stars. IX (Mason+, 1993)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/AJ/106/1639">J/AJ/106/1639 : ICCD Speckle obs. of binary stars. X. (McAlister+ 1993)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/AJ/108/2299">J/AJ/108/2299 : ICCD speckle obs. of binary stars. XI. (Hartkopf+ 1994)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/AJ/119/3084">J/AJ/119/3084 : ICCD speckle obs. of binary stars. XXIII. (Hartkopf+, 2000)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/AJ/111/393">J/AJ/111/393 : ICCD speckle obs. of binary stars. XII (Al-Shukri+ 1996)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/AJ/111/936">J/AJ/111/936 : ICCD Speckle obs. of binary stars. XIII (Hartkopf+ 1996)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/AJ/117/1905">J/AJ/117/1905 : Speckle interferometry at USNO. II. (Germain+, 1999)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/AJ/117/2511">J/AJ/117/2511 : Speckle interferometry at USNO. III (Germain+, 1999)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/AJ/118/1395">J/AJ/118/1395 : Speckle interferometry at USNO. IV. (Douglass+, 1999)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/AJ/119/3071">J/AJ/119/3071 : Speckle interferometry at USNO. V. (Douglass+, 2000)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/AJ/120/1120">J/AJ/120/1120 : Speckle interferometry at USNO. VI. (Mason+, 2000)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/other/PNAOJ/2.561">J/other/PNAOJ/2.561 : Binaries speckle observations. IV. (Miura+ 1992)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/AJ/117/548">J/AJ/117/548 : 1997 WIYN binary stars speckle observations (Horch+, 1999)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/A+A/366/868">J/A+A/366/868 : Binary speckle measurements at Calar Alto. I. 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