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<ri:Resource created="2017-04-06T08:28:16Z" 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>Gaia's DR1 parallaxes vs previous measurements</title><shortName>J/ApJ/832/L18</shortName><identifier>ivo://CDS.VizieR/J/ApJ/832/L18</identifier><altIdentifier>doi:10.26093/cds/vizier.18329018</altIdentifier><curation><publisher ivo-id="ivo://CDS">CDS</publisher><creator><name>Jao W.-C.</name></creator><creator><name>Henry T.J.</name></creator><creator><name>Riedel A.R.</name></creator><creator><name>Winters J.G.</name></creator><creator><name>Slatten K.J.</name></creator><creator><name>Gies D.R.</name></creator><date role="Updated">2017-10-09T13:34:50Z</date><date role="Created">2017-04-06T08:28:16Z</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>visible-astronomy</subject><subject>trigonometric-parallax</subject><subject>proper-motions</subject><subject>photometry</subject><description>We use 612 single stars with previously published trigonometric parallaxes placing them within 25pc to evaluate parallaxes released in Gaia's first data release (DR1). We find that the Gaia parallaxes are, on average, 0.24+/-0.02mas smaller than the weighted mean trigonometric parallax values for these stars in the solar neighborhood. We also find that the offset changes with distance out to 100pc, in the sense that the closer the star, the larger the offset. We find no systematic trends in the parallax offsets with stellar V magnitude, V-K color, or proper motion. We do find that the offset is roughly twice as large for stars south of the ecliptic compared to those that are north.</description><source format="bibcode">2016ApJ...832L..18J</source><referenceURL>https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/832/L18</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/I/98">I/98 : NLTT Catalogue (Luyten, 1979)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/I/238">I/238 : Yale Trigonometric Parallaxes, Fourth Edition (van Altena+ 1995)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/I/259">I/259 : The Tycho-2 Catalogue (Hog+ 2000)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/I/311">I/311 : Hipparcos, the New Reduction (van Leeuwen, 2007)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/I/324">I/324 : The Initial Gaia Source List (IGSL) (Smart+, 2013)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/I/337">I/337 : Gaia DR1 (Gaia Collaboration, 2016)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/AJ/105/1571">J/AJ/105/1571 : USNO Photographic Parallaxes IX (Harrington+ 1993)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/AJ/105/1962">J/AJ/105/1962 : K and M stars photometry (Weis, 1993)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/A+AS/144/45">J/A+AS/144/45 : Hipparcos astrometry for 257 stars (Fabricius+, 2000)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/AJ/130/1680">J/AJ/130/1680 : LSPM-North proper-motion catalog nearby stars (Lepine+, 2005)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/ApJ/704/975">J/ApJ/704/975 : Rotational velocities for M dwarfs (Jenkins+, 2009)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/MNRAS/403/1949">J/MNRAS/403/1949 : UBV(RcIc)JHK photometry of HIP nearby stars (Koen+, 2010)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/AJ/142/138">J/AJ/142/138 : All-sky catalog of bright M dwarfs (Lepine+, 2011)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/ApJ/730/119">J/ApJ/730/119 : HST/WFC3 obs. of Cepheids in SN Ia hosts (Riess+, 2011)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/ApJ/758/56">J/ApJ/758/56 : Young M dwarfs within 25pc. 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48958 48964 49101</spatial><spectral>8.650015785639275e-20 3.852589004194616e-19</spectral><footprint ivo-id="ivo://ivoa.net/std/moc">https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/832/L18?format=ascii</footprint><waveband>Optical</waveband></coverage><tableset><schema><name>default</name><table><name>J/ApJ/832/L18/table1</name><description>Stars within 25pc with parallaxes from GAIA-DR1 and other sources</description><column><name>SimbadName</name><description>Simbad column added by the CDS</description><ucd>meta.id</ucd><dataType xsi:type="vs:VOTableType" arraysize="10*">char</dataType></column><column><name>plx-G</name><description>[26/296] The GAIA-DR1 parallax</description><unit>mas</unit><ucd>pos.parallax.trig</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>e_plx-G</name><description>[0.2/1] Error in plx-G</description><unit>mas</unit><ucd>stat.error</ucd><dataType 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