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<ri:Resource created="2018-08-29T08:28:49Z" 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 FGK benchmark stars v2.1</title><shortName>III/281</shortName><identifier>ivo://CDS.VizieR/III/281</identifier><curation><publisher ivo-id="ivo://CDS">CDS</publisher><creator><name>Jofre P.</name></creator><creator><name>Heiter U.</name></creator><creator><name>Soubiran C.</name></creator><creator><name>Tucci Maia M.</name></creator><creator><name>Worley C.</name></creator><creator><name>Hawkins K.,Blanco-Cuaresma S.</name></creator><creator><name>Rodrigo C.</name></creator><date role="Updated">2019-08-02T15:18:04Z</date><date role="Created">2018-08-29T08:28:49Z</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>spectroscopy</subject><subject>standard-stars</subject><subject>metallicity</subject><subject>optical-observation</subject><subject>catalogs</subject><description>In this era of large spectroscopic surveys of stars of the Milky Way, pipelines need to be tested and validated against a set of well-known stars. The Gaia FGK benchmark stars (GBS) are among the preferred samples of reference stars. They consist of a small but carefully selected sample of stars whose parameters are derived consistently and homogeneously. A series of papers has been published that discuss the definition and evolution of the sample of GBS. Here we summarise this work and provide our current list of stars with associated parameters which are recommended for validation and calibration purposes for stellar surveys.</description><source format="bibcode">2018RNAAS...2..152J</source><referenceURL>https://cdsarc.cds.unistra.fr/viz-bin/cat/III/281</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/J/A+A/564/A133">J/A+A/564/A133 : Gaia FGK benchmark stars: metallicity (Jofre+, 2014)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/A+A/566/A98">J/A+A/566/A98 : The Gaia Benchmark Stars - Library (Blanco-Cuaresma+, 2014)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/A+A/582/A81">J/A+A/582/A81 : Gaia FGK benchmark stars: abundances (Jofre+, 2015)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/A+A/592/A70">J/A+A/592/A70 : Gaia FGK stars: low-metallicities candidates (Hawkins+, 2016)</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=III/281</accessURL><mirrorURL title="VizieR at IUCAA: Pune, India">https://vizier.iucaa.in/viz-bin/VizieR-2?-source=III/281</mirrorURL><mirrorURL title="VizieR at SAAO: SAAO, South Africa">http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=III/281</mirrorURL></interface></capability><capability><interface xsi:type="vs:ParamHTTP"><accessURL use="base">https://vizier.cds.unistra.fr/viz-bin/votable?-source=III/281</accessURL><mirrorURL title="VizieR at IUCAA: Pune, India">https://vizier.iucaa.in/viz-bin/votable?-source=III/281</mirrorURL><mirrorURL title="VizieR at SAAO: SAAO, South Africa">http://vizieridia.saao.ac.za/viz-bin/votable?-source=III/281</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 III/281/gbs (Stellar parameters of the GBS stars)</description><interface xsi:type="vs:ParamHTTP" role="std"><accessURL use="base">https://vizier.cds.unistra.fr/viz-bin/conesearch/III/281/gbs?</accessURL><mirrorURL title="VizieR at IUCAA: Pune, India">https://vizier.iucaa.in/viz-bin/conesearch/III/281/gbs?</mirrorURL><mirrorURL title="VizieR at SAAO: SAAO, South Africa">http://vizieridia.saao.ac.za/viz-bin/conesearch/III/281/gbs?</mirrorURL><queryType>GET</queryType><resultType>text/xml+votable</resultType></interface><maxSR>180.0</maxSR><maxRecords>50000</maxRecords><verbosity>true</verbosity><testQuery><ra>243.9052875</ra><dec>-8.36944167</dec><sr>0.005555555555555556</sr></testQuery></capability><coverage><spatial>6/15 2923 4376 4574 6219 8767 8845 12704 12953 13301 16115 17425 22120 22300 23096 23540 24715 26302 26457 26552 26975 27857 28664 30878 33281 36035 36693 36697 38072 38216 41763 42248 44542</spatial><footprint ivo-id="ivo://ivoa.net/std/moc">https://cdsarc.cds.unistra.fr/viz-bin/moc/III/281?format=ascii</footprint><waveband>Optical</waveband></coverage><tableset><schema><name>default</name><table><name>III/281/gbs</name><description>Stellar parameters of the GBS stars</description><column><name>SimbadName</name><description>Simbad column added by the CDS</description><ucd>meta.id</ucd><dataType xsi:type="vs:VOTableType" arraysize="9*">char</dataType></column><column><name>StarID1</name><description>Star name</description><ucd>meta.id;meta.main</ucd><dataType xsi:type="vs:VOTableType" arraysize="9*">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>P2</name><description>Display the data of Paper II (J/A+A/566/A98)</description><ucd>meta.ref.url</ucd><dataType xsi:type="vs:VOTableType" arraysize="*">char</dataType></column><column><name>P3</name><description>Display the data of Paper III (J/A+A/564/A133)</description><ucd>meta.ref.url</ucd><dataType xsi:type="vs:VOTableType" arraysize="*">char</dataType></column><column><name>P4</name><description>Display the data of Paper IV (J/A+A/582/A81)</description><ucd>meta.ref.url</ucd><dataType xsi:type="vs:VOTableType" arraysize="*">char</dataType></column><column><name>P5</name><description>Display the data of Paper V (J/A+A/592/A70)</description><ucd>meta.ref.url</ucd><dataType xsi:type="vs:VOTableType" arraysize="*">char</dataType></column><column><name>StarID2</name><description>? HD number (HDNNNNNN) (III/135)</description><ucd>meta.id</ucd><dataType xsi:type="vs:VOTableType" arraysize="8*">char</dataType></column><column><name>StarID3</name><description>? HIP number (HIPNNNNNN) (I/239)</description><ucd>meta.id</ucd><dataType xsi:type="vs:VOTableType" arraysize="9*">char</dataType></column><column><name>StarID4</name><description>? Gaia DR2 Source ID (I/345)</description><ucd>meta.id</ucd><flag>nullable</flag></column><column><name>RAJ2000</name><description>? Right ascension (J2000)</description><ucd>pos.eq.ra;meta.main</ucd><flag>nullable</flag></column><column><name>DEJ2000</name><description>? Declination (J2000)</description><ucd>pos.eq.dec;meta.main</ucd><flag>nullable</flag></column><column><name>SpType</name><description>? MK spectral type</description><ucd>src.spType</ucd><dataType xsi:type="vs:VOTableType" arraysize="15*">char</dataType></column><column><name>Teff</name><description>? Effective temperature (1)</description><unit>K</unit><ucd>phys.temperature.effective</ucd><dataType xsi:type="vs:VOTableType">int</dataType><flag>nullable</flag></column><column><name>e_Teff</name><description>? Uncertainty of effective temperature</description><unit>K</unit><ucd>stat.error;phys.temperature.effective</ucd><dataType xsi:type="vs:VOTableType">int</dataType><flag>nullable</flag></column><column><name>logg</name><description>? Surface gravity (2)</description><unit>log(cm.s**-2)</unit><ucd>phys.gravity</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>e_logg</name><description>? Uncertainty of surface gravity</description><unit>log(cm.s**-2)</unit><ucd>stat.error</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>[Fe/H]</name><description>Iron abundance relative to the Sun (3)</description><unit>log(Sun)</unit><ucd>phys.abund</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>e_[Fe/H]</name><description>Uncertainty of [Fe/H]</description><unit>log(Sun)</unit><ucd>stat.error;phys.abund.Fe</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>logeps(Mg)</name><description>? Abundance of magnesium (4)</description><ucd>phys.abund</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>e_logeps(Mg)</name><description>? Uncertainty of magnesium</description><ucd>stat.error</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>logeps(Si)</name><description>? Abundance of silicon</description><ucd>phys.abund</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>e_logeps(Si)</name><description>? Uncertainty of silicon</description><ucd>stat.error</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>logeps(Ca)</name><description>? Abundance of calcium</description><ucd>phys.abund</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>e_logeps(Ca)</name><description>? Uncertainty of calcium</description><ucd>stat.error</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>logeps(Ti)</name><description>? Abundance of titanium</description><ucd>phys.abund</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>e_logeps(Ti)</name><description>? Uncertainty of titanium</description><ucd>stat.error</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>logeps(Sc)</name><description>? Abundance of scandium</description><ucd>phys.abund</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>e_logeps(Sc)</name><description>? Uncertainty of scandium</description><ucd>stat.error</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>logeps(V)</name><description>? Abundance of vanadium</description><ucd>phys.abund</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>e_logeps(V)</name><description>? Uncertainty of vanadium</description><ucd>stat.error</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>logeps(Cr)</name><description>? Abundance of chromium</description><ucd>phys.abund</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>e_logeps(Cr)</name><description>? Uncertainty of chromium</description><ucd>stat.error</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>logeps(Mn)</name><description>? Abundance of manganese</description><ucd>phys.abund</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>e_logeps(Mn)</name><description>? Uncertainty of manganese</description><ucd>stat.error</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>logeps(Co)</name><description>? Abundance of cobalt</description><ucd>phys.abund</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>e_logeps(Co)</name><description>? Uncertainty of cobalt</description><ucd>stat.error</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>logeps(Ni)</name><description>? Abundance of nickel</description><ucd>phys.abund</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>e_logeps(Ni)</name><description>? Uncertainty of nickel</description><ucd>stat.error</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>[Mg/H]</name><description>? Magnesium relative to the Sun (5)</description><unit>log(Sun)</unit><ucd>phys.abund</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>e_[Mg/H]</name><description>? Uncertainty of [Mg/H]</description><unit>log(Sun)</unit><ucd>stat.error;phys.abund</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>[Si/H]</name><description>? Silicon relative to the Sun</description><unit>log(Sun)</unit><ucd>phys.abund</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>e_[Si/H]</name><description>? Uncertainty of [Si/H]</description><unit>log(Sun)</unit><ucd>stat.error;phys.abund</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>[Ca/H]</name><description>? Calcium relative to the Sun</description><unit>log(Sun)</unit><ucd>phys.abund</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>e_[Ca/H]</name><description>? Uncertainty of [Ca/H]</description><unit>log(Sun)</unit><ucd>stat.error;phys.abund</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>[Ti/H]</name><description>? Titanium relative to the Sun</description><unit>log(Sun)</unit><ucd>phys.abund</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>e_[Ti/H]</name><description>? Uncertainty of [Ti/H]</description><unit>log(Sun)</unit><ucd>stat.error;phys.abund</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>[Sc/H]</name><description>? Scandium relative to the Sun</description><unit>log(Sun)</unit><ucd>phys.abund</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>e_[Sc/H]</name><description>? Uncertainty of [Sc/H]</description><unit>log(Sun)</unit><ucd>stat.error;phys.abund</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>[V/H]</name><description>? Vanadium relative to the Sun</description><unit>log(Sun)</unit><ucd>phys.abund</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>e_[V/H]</name><description>? Uncertainty of [V/H]</description><unit>log(Sun)</unit><ucd>stat.error;phys.abund</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>[Cr/H]</name><description>? Chromium relative to the Sun</description><unit>log(Sun)</unit><ucd>phys.abund</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>e_[Cr/H]</name><description>? Uncertainty of [Cr/H]</description><unit>log(Sun)</unit><ucd>stat.error;phys.abund</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>[Mn/H]</name><description>? Manganese relative to the Sun</description><unit>log(Sun)</unit><ucd>phys.abund</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>e_[Mn/H]</name><description>? Uncertainty of [Mn/H]</description><unit>log(Sun)</unit><ucd>stat.error;phys.abund</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>[Co/H]</name><description>? Cobalt relative to the Sun</description><unit>log(Sun)</unit><ucd>phys.abund</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>e_[Co/H]</name><description>? Uncertainty of [Co/H]</description><unit>log(Sun)</unit><ucd>stat.error;phys.abund</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>[Ni/H]</name><description>? 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