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<ri:Resource created="2026-04-03T00:00:00" status="active" updated="2026-04-03T00:00:00" 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>Symbiotic Stars Catalog</title>
  <shortName>Symbiotics</shortName>
  <identifier>ivo://nasa.heasarc/symbiotics</identifier>
  <curation>
    <publisher ivo-id="ivo://nasa.heasarc/ASD">NASA/GSFC HEASARC</publisher>
    <creator>
      <name>Belczynski et al.</name>
    </creator>
    <contributor/>
    <date>2026-04-03</date>
    <contact>
      <name>NASA/GSFC HEASARC help desk</name>
      <email>heasarc-vo at athena.gsfc.nasa.gov</email>
    </contact>
  </curation>
  <content>
    <subject>Star</subject>
    <description>
      This database table contains a catalog of confirmed and suspected symbiotic stars. The list includes 188 symbiotic stars as well as 30 objects suspected of being symbiotic. For each star, basic observational material is presented: coordinates, V and K magnitudes, ultraviolet (UV), infrared (IR), X-ray and radio observations. Also listed are the spectral type of the cool component, the maximum ionization potential observed, references to finding charts, spectra, classifications and recent (as of 2000) papers discussing the physical parameters and nature of each object. This table does NOT contain the information on orbital photometric ephemerides and orbital elements of known symbiotic binaries, pulsational periods for symbiotic Miras, Hipparcos parallaxes and information about outbursts and flickering that is contained in the printed version of the catalog (see Tables 3-7 in the paper for this material). This table was created by the HEASARC in November 2005 based on 4 CDS tables (table1.dat, table1b.dat, table2.dat, table2b.dat) from the directory J/A+AS/146/407/. This is a service provided by NASA HEASARC .
    </description>
    <source format="">
      2000A&amp;amp;AS..146..407B
    </source>
    <referenceURL>https://heasarc.gsfc.nasa.gov/W3Browse/all/symbiotics.html</referenceURL>
    <type>Catalog</type>
    <contentLevel>Research</contentLevel>
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      <relationshipType>
        served-by
      </relationshipType>
      <relatedResource ivo-id="ivo://nasa.heasarc/services/xamin">
        HEASARC TAP
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    </relationship>
  </content>
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    <interface role="std" xsi:type="vs:ParamHTTP">
      <accessURL use="base">
        https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&amp;table=symbiotics&amp;
      </accessURL>
      <queryType>GET</queryType>
      <resultType>text/xml</resultType>
    </interface>
    <maxSR>180</maxSR>
    <maxRecords>99999</maxRecords>
    <verbosity>true</verbosity>
    <testQuery>
      <ra>16.175</ra>
      <dec>-75.8</dec>
      <sr>0.0333333333333333</sr>
    </testQuery>
  </capability>
  <capability standardID="ivo://ivoa.net/std/TAP#aux">
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      <accessURL use="base">
        https://heasarc.gsfc.nasa.gov/xamin/vo/tap
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  </capability>
  <capability>
    <interface xsi:type="vs:ParamHTTP">
      <accessURL use="base">
        https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=symbiotics
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      <resultType>text/xml</resultType>
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  </capability>
  <capability>
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      </accessURL>
    </interface>
  </capability>
  <facility>STAR CATALOG</facility>
  <coverage>
    <stc:STCResourceProfile>
      <stc:AstroCoordSystem xlink:type="simple" xlink:href="ivo://STClib/CoordSys#UTC-ICRS-TOPO" id="_symbiotics_UTC-ICRS-TOPO47f3657b8775e036d94c506de7724222"/>
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          <stc:Size pos_unit="deg">
            0.0333333333333333
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        <stc:AllSky/>
      </stc:AstroCoordArea>
    </stc:STCResourceProfile>
    <waveband>Optical</waveband>
    <waveband>Radio</waveband>
    <waveband>Infrared</waveband>
  </coverage>
  <tableset xsi:type="vs:TableSet">
    <schema>
      <name>public</name>
      <table>
        <name>symbiotics</name>
        <description>
          Symbiotic Stars Catalog
        </description>
        <column>
          <name>kmag</name>
          <description>
            K Magnitude
          </description>
          <unit>mag</unit>
          <ucd>
            phot.mag;em.IR.K
          </ucd>
          <dataType xsi:type="vs:VOTableType">float</dataType>
          <flag>
            nullable
          </flag>
        </column>
        <column>
          <name>ref_2_subject</name>
          <description>
            Subject of the Reference
          </description>
          <ucd>
            meta.note
          </ucd>
          <dataType xsi:type="vs:VOTableType">char</dataType>
          <flag>
            nullable
          </flag>
        </column>
        <column>
          <name>flux_25um_limit</name>
          <description>
            Flag Indicates 25um IRAS Flux Is Upper Limit [&lt;] or Uncertain [:]
          </description>
          <ucd>
            meta.code;phot.flux;em.IR.15-30um
          </ucd>
          <dataType xsi:type="vs:VOTableType">char</dataType>
          <flag>
            nullable
          </flag>
        </column>
        <column>
          <name>ref_3</name>
          <description>
            Major Literature Reference
          </description>
          <ucd>
            meta.bib
          </ucd>
          <dataType xsi:type="vs:VOTableType">char</dataType>
          <flag>
            nullable
          </flag>
        </column>
        <column>
          <name>vmag</name>
          <description>
            V Magnitude
          </description>
          <unit>mag</unit>
          <ucd>
            phot.mag;em.opt.V
          </ucd>
          <dataType xsi:type="vs:VOTableType">float</dataType>
          <flag>
            nullable
          </flag>
        </column>
        <column>
          <name>"__y_ra_dec"</name>
          <description>
            System unit vector column
          </description>
          <dataType xsi:type="vs:VOTableType">double</dataType>
          <flag>
            nullable
          </flag>
        </column>
        <column>
          <name>lii</name>
          <description>
            Galactic Longitude
          </description>
          <unit>degree</unit>
          <ucd>
            pos.galactic.lat
          </ucd>
          <dataType xsi:type="vs:VOTableType">double</dataType>
          <flag>
            nullable
          </flag>
        </column>
        <column>
          <name>radio_flux_1</name>
          <description>
            Radio Flux Measurement at Wavelength Specified by Radio_Wavelength (mJy)
          </description>
          <unit>mJy</unit>
          <ucd>
            phot.flux.density;em.radio
          </ucd>
          <dataType xsi:type="vs:VOTableType">float</dataType>
          <flag>
            nullable
          </flag>
        </column>
        <column>
          <name>ra</name>
          <description>
            Right Ascension
          </description>
          <unit>degree</unit>
          <ucd>
            pos.eq.ra;meta.main
          </ucd>
          <dataType xsi:type="vs:VOTableType">double</dataType>
          <flag>
            nullable
          </flag>
        </column>
        <column>
          <name>alt_spect_type_ref</name>
          <description>
            References for Second Spectral Type
          </description>
          <ucd>
            meta.ref;src.spType
          </ucd>
          <dataType xsi:type="vs:VOTableType">char</dataType>
          <flag>
            nullable
          </flag>
        </column>
        <column>
          <name>radio_flux_1_limit</name>
          <description>
            Limit Flag for First Radio Flux Measurement
          </description>
          <ucd>
            meta.code;phot.flux.density;em.radio
          </ucd>
          <dataType xsi:type="vs:VOTableType">char</dataType>
          <flag>
            nullable
          </flag>
        </column>
        <column>
          <name>"__row"</name>
          <description>
            System index column
          </description>
          <dataType xsi:type="vs:VOTableType">char</dataType>
          <flag>
            nullable
          </flag>
        </column>
        <column>
          <name>"__x_ra_dec"</name>
          <description>
            System unit vector column
          </description>
          <dataType xsi:type="vs:VOTableType">double</dataType>
          <flag>
            nullable
          </flag>
        </column>
        <column>
          <name>name</name>
          <description>
            Star Designation
          </description>
          <ucd>
            meta.id;meta.main
          </ucd>
          <dataType xsi:type="vs:VOTableType">char</dataType>
          <flag>
            nullable
          </flag>
        </column>
        <column>
          <name>flux_12um_limit</name>
          <description>
            Flag Indicates 12um IRAS Flux Is Upper Limit
          </description>
          <ucd>
            meta.code;phot.flux;em.IR.8-15um
          </ucd>
          <dataType xsi:type="vs:VOTableType">char</dataType>
          <flag>
            nullable
          </flag>
        </column>
        <column>
          <name>max_ip</name>
          <description>
            Highest Ionization Potential Ever Observed in the Emission-Line Spectra
          </description>
          <unit>eV</unit>
          <ucd>
            phys.energy;phys.atmol.ionization
          </ucd>
          <dataType xsi:type="vs:VOTableType">float</dataType>
          <flag>
            nullable
          </flag>
        </column>
        <column>
          <name>vmag_flag</name>
          <description>
            Uncertainty Flag fr V Magnitude
          </description>
          <ucd>
            meta.code.qual;phot.mag;em.opt.V
          </ucd>
          <dataType xsi:type="vs:VOTableType">char</dataType>
          <flag>
            nullable
          </flag>
        </column>
        <column>
          <name>flux_12um</name>
          <description>
            IRAS Flux at 12 um (Jy)
          </description>
          <unit>Jy</unit>
          <ucd>
            phot.flux.density;em.IR.8-15um
          </ucd>
          <dataType xsi:type="vs:VOTableType">double</dataType>
          <flag>
            nullable
          </flag>
        </column>
        <column>
          <name>kmag_limit</name>
          <description>
            Limit Flag for K Magnitude
          </description>
          <ucd>
            meta.code;phot.mag;em.IR.K
          </ucd>
          <dataType xsi:type="vs:VOTableType">char</dataType>
          <flag>
            nullable
          </flag>
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        <column>
          <name>"__z_ra_dec"</name>
          <description>
            System unit vector column
          </description>
          <dataType xsi:type="vs:VOTableType">double</dataType>
          <flag>
            nullable
          </flag>
        </column>
        <column>
          <name>ref_1</name>
          <description>
            Major Literature Reference
          </description>
          <ucd>
            meta.bib
          </ucd>
          <dataType xsi:type="vs:VOTableType">char</dataType>
          <flag>
            nullable
          </flag>
        </column>
        <column>
          <name>max_ip_flag</name>
          <description>
            Uncertainty Flag for Highest Ionization Potential
          </description>
          <ucd>
            meta.code.qual;phys.energy;phys.atmol.ionization
          </ucd>
          <dataType xsi:type="vs:VOTableType">char</dataType>
          <flag>
            nullable
          </flag>
        </column>
        <column>
          <name>dec</name>
          <description>
            Declination
          </description>
          <unit>degree</unit>
          <ucd>
            pos.eq.dec;meta.main
          </ucd>
          <dataType xsi:type="vs:VOTableType">double</dataType>
          <flag>
            nullable
          </flag>
        </column>
        <column>
          <name>alt_spect_type</name>
          <description>
            Second Estimate of the Spectral Type
          </description>
          <ucd>
            src.spType
          </ucd>
          <dataType xsi:type="vs:VOTableType">char</dataType>
          <flag>
            nullable
          </flag>
        </column>
        <column>
          <name>radio_flux_2</name>
          <description>
            Second Radio Flux Measurement (mJy)
          </description>
          <unit>mJy</unit>
          <ucd>
            phot.flux.density;em.radio
          </ucd>
          <dataType xsi:type="vs:VOTableType">float</dataType>
          <flag>
            nullable
          </flag>
        </column>
        <column>
          <name>xray_detected</name>
          <description>
            Flag Indicates Whether Object Was Ever Detected in the X-Ray Regime
          </description>
          <ucd>
            meta.code;obs;em.X-ray
          </ucd>
          <dataType xsi:type="vs:VOTableType">char</dataType>
          <flag>
            nullable
          </flag>
        </column>
        <column>
          <name>ref_4</name>
          <description>
            Major Literature Reference
          </description>
          <ucd>
            meta.bib
          </ucd>
          <dataType xsi:type="vs:VOTableType">short</dataType>
          <flag>
            nullable
          </flag>
        </column>
        <column>
          <name>radio_flux_1_flag</name>
          <description>
            Uncertainty Flag for First Radio Flux Measurement
          </description>
          <ucd>
            meta.code;phot.flux.density;em.radio
          </ucd>
          <dataType xsi:type="vs:VOTableType">char</dataType>
          <flag>
            nullable
          </flag>
        </column>
        <column>
          <name>ref_1_subject</name>
          <description>
            Subject of the Reference
          </description>
          <ucd>
            meta.note
          </ucd>
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          <flag>
            nullable
          </flag>
        </column>
        <column>
          <name>ref_2</name>
          <description>
            Major Literature Reference
          </description>
          <ucd>
            meta.bib
          </ucd>
          <dataType xsi:type="vs:VOTableType">char</dataType>
          <flag>
            nullable
          </flag>
        </column>
        <column>
          <name>alt_name</name>
          <description>
            Symbiotic (NNN) or Suspected Symbiotic (sNN) Catalog Entry Designation
          </description>
          <ucd>
            meta.id
          </ucd>
          <dataType xsi:type="vs:VOTableType">char</dataType>
          <flag>
            nullable
          </flag>
        </column>
        <column>
          <name>flux_25um</name>
          <description>
            IRAS Flux at 25 um (Jy)
          </description>
          <unit>Jy</unit>
          <ucd>
            phot.flux.density;em.IR.15-30um
          </ucd>
          <dataType xsi:type="vs:VOTableType">double</dataType>
          <flag>
            nullable
          </flag>
        </column>
        <column>
          <name>symbiotic_status</name>
          <description>
            Indicates Whether Symbiotics Star Is Confirmed or Suspected
          </description>
          <ucd>
            meta.code.qual;src.class
          </ucd>
          <dataType xsi:type="vs:VOTableType">char</dataType>
          <flag>
            nullable
          </flag>
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          <description>
            Subject of the Reference
          </description>
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            meta.note
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        </column>
        <column>
          <name>radio_wavelength</name>
          <description>
            Wavelength of Radio observation
          </description>
          <ucd>
            em.wl
          </ucd>
          <dataType xsi:type="vs:VOTableType">char</dataType>
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        </column>
        <column>
          <name>class</name>
          <description>
            Browse Object Classification
          </description>
          <ucd>
            src.class
          </ucd>
          <dataType xsi:type="vs:VOTableType">short</dataType>
          <flag>
            nullable
          </flag>
        </column>
        <column>
          <name>ir_type</name>
          <description>
            Infrared Type
          </description>
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          <flag>
            nullable
          </flag>
        </column>
        <column>
          <name>ref_3_subject</name>
          <description>
            Subject of the Reference
          </description>
          <ucd>
            meta.note
          </ucd>
          <dataType xsi:type="vs:VOTableType">char</dataType>
          <flag>
            nullable
          </flag>
        </column>
        <column>
          <name>iue_spectra</name>
          <description>
            Flag Indicates Whether IUE Spectrum (or Spectra) Is (Are) Available
          </description>
          <ucd>
            meta.code;obs;em.UV
          </ucd>
          <dataType xsi:type="vs:VOTableType">char</dataType>
          <flag>
            nullable
          </flag>
        </column>
        <column>
          <name>vmag_limit</name>
          <description>
            Limit Flag for V Magnitude
          </description>
          <ucd>
            meta.code;phot.mag;em.opt.V
          </ucd>
          <dataType xsi:type="vs:VOTableType">char</dataType>
          <flag>
            nullable
          </flag>
        </column>
        <column>
          <name>spect_type_ref</name>
          <description>
            References for Spectral Type
          </description>
          <ucd>
            meta.ref;src.spType
          </ucd>
          <dataType xsi:type="vs:VOTableType">char</dataType>
          <flag>
            nullable
          </flag>
        </column>
        <column>
          <name>bii</name>
          <description>
            Galactic Latitude
          </description>
          <unit>degree</unit>
          <ucd>
            pos.galactic.lat
          </ucd>
          <dataType xsi:type="vs:VOTableType">double</dataType>
          <flag>
            nullable
          </flag>
        </column>
        <column>
          <name>spect_type</name>
          <description>
            Estimate of the Spectral Type of the Cool Component
          </description>
          <ucd>
            src.spType
          </ucd>
          <dataType xsi:type="vs:VOTableType">char</dataType>
          <flag>
            nullable
          </flag>
        </column>
        <column>
          <name>xray_detected_flag</name>
          <description>
            Flag Indicates Detection of X-Rays Is Uncertain
          </description>
          <ucd>
            meta.code.qual;obs;em.X-ray
          </ucd>
          <dataType xsi:type="vs:VOTableType">char</dataType>
          <flag>
            nullable
          </flag>
        </column>
        <column>
          <name>note_flag</name>
          <description>
            Flag Indicates Classification Note and/or Comment for the Given Object
          </description>
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            meta.code;src.class
          </ucd>
          <dataType xsi:type="vs:VOTableType">char</dataType>
          <flag>
            nullable
          </flag>
        </column>
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