<?xml version='1.0'?><?xml-stylesheet href='/static/xsl/oai.xsl' type='text/xsl'?><oai:OAI-PMH xmlns:oai="http://www.openarchives.org/OAI/2.0/" xmlns:ri="http://www.ivoa.net/xml/RegistryInterface/v1.0" xmlns:stc="http://www.ivoa.net/xml/STC/stc-v1.30.xsd" xmlns:vr="http://www.ivoa.net/xml/VOResource/v1.0" xmlns:vs="http://www.ivoa.net/xml/VODataService/v1.1" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/ http://vo.ari.uni-heidelberg.de/docs/schemata/OAI-PMH.xsd http://www.ivoa.net/xml/RegistryInterface/v1.0 http://vo.ari.uni-heidelberg.de/docs/schemata/RegistryInterface-v1.0.xsd http://www.ivoa.net/xml/STC/stc-v1.30.xsd http://vo.ari.uni-heidelberg.de/docs/schemata/stc-v1.30.xsd http://www.ivoa.net/xml/VOResource/v1.0 http://vo.ari.uni-heidelberg.de/docs/schemata/VOResource-v1.0.xsd http://www.ivoa.net/xml/VODataService/v1.1 http://vo.ari.uni-heidelberg.de/docs/schemata/VODataService-v1.1.xsd http://www.w3.org/1999/xlink http://vo.ari.uni-heidelberg.de/docs/schemata/xlink.xsd"><oai:responseDate>2026-05-25T13:36:56.720382</oai:responseDate><oai:metadata><ri:Resource created="2019-07-03T01:02:03" status="active" updated="2020-11-30T03:16:20" xsi:type="vs:CatalogService"><title>OUSpectra</title><shortName>ouspec cone</shortName><identifier>ivo://bsdc.icranet.org/ouspectra/q/cone</identifier><curation><publisher>BSDC</publisher><creator><name>Paolo Giommi</name></creator><date role="updated">2020-11-30T03:16:20</date><contact><name>Carlos H. Brandt</name><address>Piazza della Repubblica 10, 65122, Pescara, Italia</address><email>carlos.henrique.brandt@gmail.com</email><telephone>+393248404669</telephone></contact></curation><content><subject>Catalogs</subject><subject>X-ray sources</subject><description> The Open Universe XRT Spectra timing catalog.</description><source> 2019 in preparation</source><referenceURL>http://vo.bsdc.icranet.org/ouspectra/q/cone/info</referenceURL></content><coverage><stc:STCResourceProfile><stc:AstroCoordSystem id="aeepewpstodn"><stc:SpaceFrame id="apnpewpstodn"><stc:ICRS/><stc:UNKNOWNRefPos/><stc:SPHERICAL coord_naxes="2"/></stc:SpaceFrame></stc:AstroCoordSystem><stc:AstroCoordArea coord_system_id="aeepewpstodn"><stc:AllSky frame_id="apnpewpstodn" unit="deg"/></stc:AstroCoordArea></stc:STCResourceProfile><waveband>X-ray</waveband></coverage><tableset><schema><name>ouspectra</name><title>OUSpectra</title><description> The Open Universe XRT Spectra timing catalog.</description><table 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arraysize="1" xsi:type="vs:VOTableType">float</dataType></column><column><name>flux05_2_err</name><description>Flux error at 0.5-2 keV</description><unit>erg sec-1 cm-2</unit><ucd>stat.error;phot.flux.density;em.X-ray</ucd><dataType arraysize="1" xsi:type="vs:VOTableType">float</dataType></column><column><name>flux2_10</name><description>Flux at 2-10 keV</description><unit>erg sec-1 cm-2</unit><ucd>phot.flux.density;em.X-ray</ucd><dataType arraysize="1" xsi:type="vs:VOTableType">float</dataType></column><column><name>flux2_10_err</name><description>Flux error at 2-10 keV</description><unit>erg sec-1 cm-2</unit><ucd>stat.error;phot.flux.density;em.X-ray</ucd><dataType arraysize="1" xsi:type="vs:VOTableType">float</dataType></column><column><name>pl_index</name><description>X-ray photon index</description><ucd>spect.index</ucd><dataType arraysize="1" xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>pl_index_err</name><description>Error on X-ray photon index</description><ucd>stat.error;spect.index</ucd><dataType arraysize="1" xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>observation_time</name><description>observation time</description><unit>MJD</unit><ucd>time.start</ucd><dataType arraysize="1" xsi:type="vs:VOTableType">double</dataType></column></table><table><name>ouspectra.main</name><description> The Open Universe XRT Spectra timing catalog.</description><column><name>id</name><description>Object ID</description><ucd>meta.id;meta.main</ucd><dataType arraysize="*" xsi:type="vs:VOTableType">char</dataType><flag>indexed</flag><flag>primary</flag></column><column><name>name</name><description>Designation</description><ucd>meta.id.cross;meta.main</ucd><dataType arraysize="*" xsi:type="vs:VOTableType">char</dataType></column><column><name>ra</name><description>Right ascension (J2000) of the object</description><unit>deg</unit><ucd>pos.eq.ra;meta.main</ucd><dataType arraysize="1" 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