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<ri:Resource created="2014-09-10T15:50:58Z" 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>X and {gamma} spectral indexes of Fermi blazars</title><shortName>J/ApJ/761/125</shortName><identifier>ivo://CDS.VizieR/J/ApJ/761/125</identifier><altIdentifier>doi:10.26093/cds/vizier.17610125</altIdentifier><curation><publisher ivo-id="ivo://CDS">CDS</publisher><creator><name>Fan J.H.</name></creator><creator><name>Yang J.H.</name></creator><creator><name>Yuan Y.H.</name></creator><creator><name>Wang J.</name></creator><creator><name>Gao Y.</name></creator><date role="Updated">2017-12-07T07:27:03Z</date><date role="Created">2014-09-10T15:50:58Z</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>bl-lacertae-objects</subject><subject>quasars</subject><subject>x-ray-sources</subject><subject>gamma-ray-astronomy</subject><subject>redshifted</subject><description>In this paper, a sample of 451 blazars (193 flat spectrum radio quasars (FSRQs), 258 BL Lacertae objects) with corresponding X-ray and Fermi {gamma}-ray data is compiled to investigate the correlation both between the X-ray spectral index and the {gamma}-ray spectral index and between the spectral index and the luminosity, and to compare the spectral indexes {alpha}_X_, {alpha}_{gamma}_, {alpha}_X{gamma}_, and {alpha}_{gamma}X{gamma}_ for different subclasses. We also investigated the correlation between the X-ray and the {gamma}-ray luminosity.</description><source format="bibcode">2012ApJ...761..125F</source><referenceURL>https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/761/125</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/ApJS/199/31">J/ApJS/199/31 : Fermi LAT second source catalog (2FGL) (Nolan+, 2012)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/A+A/538/A26">J/A+A/538/A26 : BL Lac objects beyond z=1.3 (Rau+, 2012)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/ApJ/754/23">J/ApJ/754/23 : Blazar submm + {gamma}-ray luminosities (Leon-Tavares+, 2012)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/ApJ/748/68">J/ApJ/748/68 : WISE IR colors of gamma-ray blazars (D'Abrusco+, 2012)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/ApJ/743/171">J/ApJ/743/171 : The 2LAC catalog (Ackermann+, 2011)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/ApJ/722/L7">J/ApJ/722/L7 : Fermi/LAT detected MOJAVE AGNs (Pushkarev+, 2010)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/ApJ/716/30">J/ApJ/716/30 : SED of Fermi bright blazars (Abdo+, 2010)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/ApJ/709/1407">J/ApJ/709/1407 : SED of the Fermi blazars (Li+, 2010)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/ApJS/188/405">J/ApJS/188/405 : Fermi-LAT first source catalog (1FGL) (Abdo+, 2010)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/ApJ/700/597">J/ApJ/700/597 : FERMI LAT detected blazars (Abdo+, 2009)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/A+A/495/691">J/A+A/495/691 : Multifrequency cat. of blazars, Roma-BZCAT (Massaro+, 2009)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/A+A/470/787">J/A+A/470/787 : High energy peaked BL Lacs opt. spectros. 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