@prefix dcat: <http://www.w3.org/ns/dcat#> .
@prefix dct: <http://purl.org/dc/terms/> .
@prefix foaf: <http://xmlns.com/foaf/0.1/> .
@prefix org: <http://www.w3.org/ns/org#> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix vcard: <http://www.w3.org/2006/vcard/ns#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

<https://data.nasa.gov/dataset/0c7b14a0-1f4e-4caf-bbbb-38186554fd83> a dcat:Dataset ;
    dct:description "This table contains the results of a detailed X-ray spectral analysis of a sample of 123 X-ray sources detected with XMM-Newton in the Lockman Hole field. This is the deepest observation carried out as yet with XMM-Newton with more that 600 ks of good EPIC-pn data.There are spectra with good signal to noise (&gt;500 source counts) for all objects down to 0.2 - 12 keV fluxes of 5 x 10&lt;sup&gt;-15&lt;/sup&gt; erg/cm&lt;sup&gt;2&lt;/sup&gt;/s (the flux limit is 6 x 10&lt;sup&gt;-16&lt;/sup&gt; erg/cm&lt;sup&gt;2&lt;/sup&gt;/s in the 0.5 - 2.0 and 2 - 10 keV bands). At the time of the analysis, the authors had optical spectroscopic identifications for 60% of the sources, 46 being optical type-1 AGN and 28 optical type-2 AGN. Using a single power law model, their sources&#39; average spectral slope hardens at faint 0.5 - 2 keV fluxes but not at faint 2 - 10 keV fluxes. This table was created by the HEASARC in June 2007 based on &lt;a href=\"https://cdsarc.cds.unistra.fr/ftp/cats/J/A+A/444/79\"&gt;CDS Catalog J/A+A/444/79&lt;/a&gt;, file table8.dat. This is a service provided by NASA HEASARC ." ;
    dct:identifier "ivo://nasa.heasarc/lockmanxmm" ;
    dct:issued "2025-04-01T13:27:22.623350"^^xsd:dateTime ;
    dct:modified "2026-10-26T22:16:12+00:00"^^xsd:dateTime ;
    dct:publisher <https://data.nasa.gov/organization/dbb294e4-8597-44f5-aaf4-c0baac12cdbc> ;
    dct:title "Lockman Hole Field XMM-Newton X-Ray Point Source Catalog" ;
    dcat:contactPoint [ a vcard:Organization ;
            vcard:fn "HEASARC Help Desk" ;
            vcard:hasEmail <mailto:andrew.ptak@nasa.gov> ] ;
    dcat:distribution <https://data.nasa.gov/dataset/0c7b14a0-1f4e-4caf-bbbb-38186554fd83/resource/de2e58df-c27a-4462-bb77-a05e52a8c2b7>,
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    dcat:keyword "__" ;
    dcat:theme <%7BAstrophysics%7D> .

<https://data.nasa.gov/dataset/0c7b14a0-1f4e-4caf-bbbb-38186554fd83/resource/de2e58df-c27a-4462-bb77-a05e52a8c2b7> a dcat:Distribution ;
    dct:format "BIN" ;
    dct:identifier "de2e58df-c27a-4462-bb77-a05e52a8c2b7" ;
    dct:issued "2025-08-21T15:29:23.712283"^^xsd:dateTime ;
    dct:modified "2026-03-09T19:19:40.091376"^^xsd:dateTime ;
    dcat:accessURL <https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=lockmanxmm&> ;
    dcat:mediaType "application/octet-stream" .

<https://data.nasa.gov/dataset/0c7b14a0-1f4e-4caf-bbbb-38186554fd83/resource/f3e9406b-2ce7-4e6e-b751-e0017f5a95f5> a dcat:Distribution ;
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    dct:issued "2025-08-21T15:29:23.712279"^^xsd:dateTime ;
    dct:modified "2026-03-09T19:19:40.091083"^^xsd:dateTime ;
    dcat:accessURL <https://heasarc.gsfc.nasa.gov/W3Browse/all/lockmanxmm.html> ;
    dcat:mediaType "text/html" .

<https://data.nasa.gov/organization/dbb294e4-8597-44f5-aaf4-c0baac12cdbc> a org:Organization ;
    skos:prefLabel "NASA" ;
    foaf:name "NASA" .