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ivo-id="ivo://CDS">CDS</publisher><creator><name>Rutten R.G.M.</name></creator><date role="Updated">2017-10-09T13:34:32Z</date><date role="Created">2010-09-13T13:45:39Z</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>late-type-stars</subject><subject>dwarf-stars</subject><subject>giant-stars</subject><subject>absolute-magnitude</subject><description>The relation between the CaII H and K line-tore flux density and rotation period is studied for a sample of 313 cool stars of luminosity classes ranging from II-III to V, and compared to similar relations for MgII h and k and soft X-ray.</description><source 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