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<ri:Resource created="2003-03-29T08:01:32Z" 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>Chandra HRC source in M31</title><shortName>J/ApJ/578/114</shortName><identifier>ivo://CDS.VizieR/J/ApJ/578/114</identifier><altIdentifier>doi:10.26093/cds/vizier.15780114</altIdentifier><curation><publisher ivo-id="ivo://CDS">CDS</publisher><creator><name>Kaaret P.</name></creator><date role="Updated">2003-03-29T07:02:39Z</date><date role="Created">2003-03-29T08:01:32Z</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>x-ray-sources</subject><description>We present results from a 47ks observation of the Andromeda galaxy, M31, using the High Resolution Camera of the Chandra X-Ray Observatory. We detect 142 point sources spanning 3 orders of magnitude in luminosity, from L_X_=2x10^35^ to 2x10^38^erg/s in the 0.1-10keV band. The X-ray source location accuracy is better than 1" in the central regions of the galaxy. 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