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<ri:Resource created="2026-10-09T00:00:00" status="active" updated="2026-10-09T00:00:00" version="1.2" xmlns:cs="http://www.ivoa.net/xml/ConeSearch/v1.0" 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.ivoa.net/xml/ConeSearch/v1.0 http://vo.ari.uni-heidelberg.de/docs/schemata/ConeSearch.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.xsd http://www.ivoa.net/xml/VODataService/v1.1 http://vo.ari.uni-heidelberg.de/docs/schemata/VODataService.xsd http://www.w3.org/1999/xlink http://vo.ari.uni-heidelberg.de/docs/schemata/xlink.xsd" xsi:type="vs:CatalogService">
  <title>ROSAT 13-hour Field XMM-Newton X-Ray Source Catalog</title>
  <shortName>ROS13HRXMM</shortName>
  <identifier>ivo://nasa.heasarc/ros13hrxmm</identifier>
  <curation>
    <publisher ivo-id="ivo://nasa.heasarc/ASD">NASA/GSFC HEASARC</publisher>
    <creator>
      <name>Loaring et al.</name>
    </creator>
    <contributor/>
    <date>2026-10-09</date>
    <contact>
      <name>NASA/GSFC HEASARC help desk</name>
      <email>heasarc-vo at athena.gsfc.nasa.gov</email>
    </contact>
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  <content>
    <subject>Survey Source</subject>
    <description>
      This table contains the results of a deep X-ray survey conducted with XMM-Newton, centered on the UK ROSAT 13-hours deep field area. This region covers 0.18 square degrees, and is the first of the two areas covered with XMM-Newton as part of an extensive multi-wavelength survey designed to study the nature and evolution of the faint X-ray source population. This table contains the final catalog of 225 sources. Within the central 9 arcminutes, 68% of the source positions are accurate to 2 arcseconds, making optical follow-up relatively straightforward. The authors construct the N(&amp;gt;S) relation in four energy bands: 0.2-0.5, 0.5-2, 2-5 and 5-10 keV. In all but the highest energy band, they find that the source counts can be represented by a double power law with a bright-end slope consistent with the Euclidean case and a break around 10&amp;lt;sup&amp;gt;-14&amp;lt;/sup&amp;gt; erg cm&amp;lt;sup&amp;gt;-2&amp;lt;/sup&amp;gt; s&amp;lt;sup&amp;gt;-1&amp;lt;/sup&amp;gt;. Below this flux, the counts exhibit a flattening. The 13-hours deep field is centered on the sky coordinates RA(J2000) = 13 34 37.1, Dec (J2000) = +37 53 02.2. The XMM-Newton observations were carried out in three separate revolutions during June 2001 for a total exposure time of 200ks. Approximately 40% of the total observation time was affected by high particle background flares, arising from soft protons hitting the detector. The data were therefore temporally filtered to remove these high-background periods. Filtering reduced the total useful exposure time from ~200 ks to ~120 ks. This table was created by the HEASARC in August 2007 based on &amp;lt;a href="https://cdsarc.cds.unistra.fr/ftp/cats/J/MNRAS/362/1371"&amp;gt;CDS catalog J/MNRAS/362/1371&amp;lt;/a&amp;gt; file table9.dat. This is a service provided by NASA HEASARC .
    </description>
    <source format="">
      2005MNRAS.362.1371L
    </source>
    <referenceURL>https://heasarc.gsfc.nasa.gov/W3Browse/all/ros13hrxmm.html</referenceURL>
    <type>Catalog</type>
    <contentLevel>Research</contentLevel>
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      <ra>203.73495833</ra>
      <dec>37.66520556</dec>
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  <facility>XMM-NEWTON</facility>
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        <name>ros13hrxmm</name>
        <description>
          ROSAT 13-hour Field XMM-Newton X-Ray Source Catalog
        </description>
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          <name>name</name>
          <description>
            Source Designation
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            meta.id;meta.main
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            Right Ascension
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          <unit>degree</unit>
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          <unit>erg/s/cm^2</unit>
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            RMS Uncertainty in 0.2-10.0 keV Band Flux (1-Sigma)
          </description>
          <unit>erg/s/cm^2</unit>
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          <name>off_axis</name>
          <description>
            XMM-Newton Off-Axis Angle (arcmin)
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          <unit>arcmin</unit>
          <ucd>
            instr.offset
          </ucd>
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            System unit vector column
          </description>
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            System unit vector column
          </description>
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            System unit vector column
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          <flag>
            nullable
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          <name>"__row"</name>
          <description>
            System index column
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          <flag>
            nullable
          </flag>
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        <column>
          <name>off_set</name>
          <description>
            Offset in Position Between XMM-Newton and Chandra Source (arcsec)
          </description>
          <unit>arcsec</unit>
          <ucd>
            pos.angDistance;em.X-ray
          </ucd>
          <dataType xsi:type="vs:VOTableType">double</dataType>
          <flag>
            nullable
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        <column>
          <name>lii</name>
          <description>
            Galactic Longitude
          </description>
          <unit>degree</unit>
          <ucd>
            pos.galactic.lon
          </ucd>
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        <column>
          <name>mb_flux</name>
          <description>
            XMM Flux in 2-5 keV Band (rg/s/cm^2)
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          <unit>erg/s/cm^2</unit>
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            phot.flux;em.X-ray.medium
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            RMS Uncertainty in 5-10 keV Band Flux (1-Sigma)
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          <unit>erg/s/cm^2</unit>
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            stat.error;phot.flux;em.X-ray.medium
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          <name>usb_counts</name>
          <description>
            XMM Count in 0.2-0.5 keV Band
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          <unit>ct</unit>
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            phot.count;em.X-ray.soft
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            XMM Flux in 0.2-0.5 keV Band (rg/s/cm^2)
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            XMM Flux in 5-10 keV Band (rg/s/cm^2)
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          <unit>erg/s/cm^2</unit>
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            phot.flux;em.X-ray.medium
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            RMS Uncertainty in 2-5 keV Band Flux (1-Sigma)
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          <unit>erg/s/cm^2</unit>
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            stat.error;phot.flux;em.X-ray.medium
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            XMM Count in 0.5-2.0 keV Band
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          <unit>ct</unit>
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            phot.count;em.X-ray.soft
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          <name>alt_name</name>
          <description>
            Alternate Designation for Source
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          <ucd>
            meta.id
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          <flag>
            nullable
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            RMS Uncertainty in 0.2-0.5 keV Band Counts (1-Sigma)
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          <unit>ct</unit>
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            stat.error;phot.count;em.X-ray.soft
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            RMS Uncertainty in 0.2-0.5 keV Band Flux (1-Sigma)
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          <unit>erg/s/cm^2</unit>
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            XMM Flux in 0.5-2.0 keV Band (rg/s/cm^2)
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            Sequential Identification Number for Each XMM-Newton Source in Catalog
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            XMM Count in 5-10 keV Band
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