<voe:VOEvent
      ivorn="ivo://nasa.gsfc.gcn/COUNTERPART#Position_2025-03-09T20:26:10.00_021786-119"
      role="observation" version="1.1"
      xmlns:voe="http://www.ivoa.net/xml/VOEvent/v1.1"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xmlns:xlink="http://www.w3.org/1999/xlink"
      xsi:schemaLocation="http://www.ivoa.net/xml/VOEvent/v1.1 http://www.ivoa.net/xml/VOEvent/VOEvent-v1.1.xsd" >
  <Who>
    <AuthorIVORN>ivo://nasa.gsfc.tan/gcn</AuthorIVORN>
    <Author>
      <shortName>VO-GCN</shortName>
      <contactName>Phil_Evans</contactName>
    </Author>
    <Date>2025-03-10T22:58:32</Date>
    <Description>This VOEvent message was created with GCN VOE version: 15.08 17jun22</Description>
  </Who>
  <What>
    <Param name="Packet_Type"   value="45" />
    <Param name="Pkt_Ser_Num"   value="33" />
    <Param name="TrigID"        value="21786" ucd="meta.id" />
    <Param name="Burst_TJD"     value="20743" unit="days" ucd="time" />
    <Param name="Burst_SOD"     value="73570.00" unit="sec" ucd="time" />
    <Param name="Intensity"     value="0.01" unit="mag" ucd="???" />
    <Param name="Inten_Uncert"  value="0.08" unit="mag" ucd="???" />
    <Param name="Filter"        value="29" unit="dn" ucd="???" />
    <Param name="Seeing"        value="0.00" unit="arcsec" ucd="instr.obsty.site.seeing" />
    <Param name="Submitter"     value="Phil_Evans" />
    <Param name="Telescope"     value="Swift-XRT" />
    <Param name="Coords_Type"   value="1" unit="dn" />
    <Param name="Coords_String" value="source_object" />
    <Group name="Obs_Support_Info" >
      <Description>The Sun and Moon values are valid at the time the VOEvent XML message was created.</Description>
      <Param name="Sun_RA"        value="351.38" unit="deg" ucd="pos.eq.ra" />
      <Param name="Sun_Dec"       value="-3.71" unit="deg" ucd="pos.eq.dec" />
      <Param name="Sun_Distance"  value="138.49" unit="deg" ucd="pos.angDistance" />
      <Param name="Sun_Hr_Angle"  value="9.35" unit="hr" />
      <Param name="Moon_RA"       value="136.25" unit="deg" ucd="pos.eq.ra" />
      <Param name="Moon_Dec"      value="20.56" unit="deg" ucd="pos.eq.dec" />
      <Param name="MOON_Distance" value="79.12" unit="deg" ucd="pos.angDistance" />
      <Param name="Moon_Illum"    value="89.41" unit="%" ucd="arith.ratio" />
      <Param name="Galactic_Long" value="331.45" unit="deg" ucd="pos.galactic.lon" />
      <Param name="Galactic_Lat"  value="50.35" unit="deg" ucd="pos.galactic.lat" />
      <Param name="Ecliptic_Long" value="211.64" unit="deg" ucd="pos.ecliptic.lon" />
      <Param name="Ecliptic_Lat"  value="3.77" unit="deg" ucd="pos.ecliptic.lat" />
    </Group>
    <Description>An optical, radio, or other-band detection of the counterpart to a GRB.</Description>
  </What>
  <WhereWhen>
    <ObsDataLocation xmlns="http://www.ivoa.net/xml/STC/stc-v1.30.xsd">
      <ObservatoryLocation xlink:href="ivo://STClib/Observatories#GEOLUN/" xlink:type="simple" id="GEOLUN" />
      <ObservationLocation>
        <AstroCoordSystem xlink:href="ivo://STClib/CoordSys#UTC-FK5-GEO/" xlink:type="simple" id="UTC-FK5-GEO" />
        <AstroCoords coord_system_id="UTC-FK5-GEO">
          <Time unit="s">
            <TimeInstant>
              <ISOTime>2025-03-09T20:26:10.00</ISOTime>
            </TimeInstant>
          </Time>
          <Position2D unit="deg">
            <Name1>RA</Name1>
            <Name2>Dec</Name2>
            <Value2>
              <C1>210.8013</C1>
              <C2>-8.5030</C2>
            </Value2>
            <Error2Radius>0.0008</Error2Radius>
          </Position2D>
        </AstroCoords>
      </ObservationLocation>
    </ObsDataLocation>
  <Description>The RA,Dec coordinates are of the type: source_object.</Description>
  </WhereWhen>
  <How>
    <Description>GRB Afterglow Counterpart</Description>
    <Reference uri="http://gcn.gsfc.nasa.gov/counterpart.html" type="url" />
  </How>
  <Why>
    <Inference probability="0.9">
      <Concept>process.variation.burst;em.gamma</Concept>
    </Inference>
  </Why>
  <Description>
  </Description>
</voe:VOEvent>
