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<ri:Resource created="2005-06-12T16:46:05Z" 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>Chromospheric Ca II emission in nearby stars</title><shortName>J/ApJS/152/261</shortName><identifier>ivo://CDS.VizieR/J/ApJS/152/261</identifier><altIdentifier>doi:10.26093/cds/vizier.21520261</altIdentifier><curation><publisher ivo-id="ivo://CDS">CDS</publisher><creator><name>Wright J.T.</name></creator><creator><name>Marcy G.W.</name></creator><creator><name>Butler R.P.</name></creator><creator><name>Vogt S.S.</name></creator><date role="Updated">2017-11-06T12:24:10Z</date><date role="Created">2005-06-12T16:46:05Z</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>stellar-atmospheres</subject><subject>dwarf-stars</subject><description>We present chromospheric CaII H and K activity measurements, rotation periods, and ages for ~1200 F, G, K, and M type main-sequence stars from ~18000 archival spectra taken at Keck and Lick Observatories as a part of the California and Carnegie Planet Search Project. We have calibrated our chromospheric S-values against the Mount Wilson chromospheric activity data. From these measurements we have calculated median activity levels and derived R'_HK_, stellar ages, and rotation periods from general parameterizations for 1228 stars, ~1000 of which have no previously published S-values. We also present precise time series of activity measurements for these stars.</description><source format="bibcode">2004ApJS..152..261W</source><referenceURL>https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/152/261</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/239">I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)</relatedResource></relationship></content><rights>https://cds.unistra.fr/vizier-org/licences_vizier.html</rights><capability><interface xsi:type="vr:WebBrowser"><accessURL 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The Hipparcos number</description><dataType xsi:type="vs:VOTableType">int</dataType><flag>nullable</flag></column><column><name>Sdiff</name><description>Sensitive differential S value (1)</description><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>Remarks</name><description>Additional notes (2)</description><dataType xsi:type="vs:VOTableType" arraysize="28*">char</dataType></column><column><name>Star</name><description>Display the data about this star from table2</description><dataType xsi:type="vs:VOTableType" arraysize="*">char</dataType></column></table><table><name>J/ApJS/152/261/table2</name><description>Measured and derived quantities for all stars</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>Name</name><description>HD or ADS number</description><dataType xsi:type="vs:VOTableType" arraysize="8*">char</dataType></column><column><name>SimbadName</name><description>Simbad column added by the CDS</description><dataType xsi:type="vs:VOTableType" arraysize="14*">char</dataType></column><column><name>HIP</name><description>? The Hipparcos number</description><dataType xsi:type="vs:VOTableType">int</dataType><flag>nullable</flag></column><column><name>Other</name><description>Other name</description><dataType xsi:type="vs:VOTableType" arraysize="14*">char</dataType></column><column><name>B-V</name><description>? The (B-V) color (1)</description><unit>mag</unit><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>VMAG</name><description>? Absolute V band magnitude (1)</description><unit>mag</unit><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>FObs</name><description>First observation date used in calculating the grand S value</description><unit>d</unit><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>LObs</name><description>Last observation date used in calculating the grand S value</description><unit>d</unit><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>NObs</name><description>Total number of observations</description><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>NBins</name><description>Number of month bins used to calculate the grand S value as defined in 5.1.1</description><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>GSVal</name><description>The grand S value (2)</description><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>Ratio</name><description>? The {sigma}_S_diff_/S ratio (3)</description><unit>%</unit><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>log(R'HK)</name><description>? Log of the R'_HK_ activity level</description><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>Per</name><description>? Rotation period</description><unit>d</unit><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>l_log(Age)</name><description>Limit flag on log(Age)</description><dataType xsi:type="vs:VOTableType" arraysize="1*">char</dataType></column><column><name>log(Age)</name><description>? 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