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<ri:Resource created="2014-03-01T06:42:49Z" status="active" updated="2025-05-19T09:50:00Z" version="1.2" xmlns:cs="http://www.ivoa.net/xml/ConeSearch/v1.0" xmlns:ri="http://www.ivoa.net/xml/RegistryInterface/v1.0" xmlns:vr="http://www.ivoa.net/xml/VOResource/v1.0" xmlns:vs="http://www.ivoa.net/xml/VODataService/v1.1" 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/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" xsi:type="vs:CatalogService"><title>The Chandra Source Catalog, Release 1.1</title><shortName>IX/45</shortName><identifier>ivo://CDS.VizieR/IX/45</identifier><curation><publisher ivo-id="ivo://CDS">CDS</publisher><creator><name>Evans I.N.</name></creator><creator><name>Primini F.A.</name></creator><creator><name>Glotfelty C.S.</name></creator><creator><name>Anderson C.S.</name></creator><creator><name>Bonaventura N.R.,Chen J.C.</name></creator><creator><name>Davis J.E.</name></creator><creator><name>Doe S.M.</name></creator><creator><name>Evans J.D.</name></creator><creator><name>Fabbiano G.</name></creator><creator><name>Galle E.C.,Gibbs D.G.</name></creator><creator><name>Grier J.D.</name></creator><creator><name>Hain R.M.</name></creator><creator><name>Hall D.M.</name></creator><creator><name>Harbo P.N.</name></creator><creator><name>He X.,Houck J.C.</name></creator><creator><name>Karovska M.</name></creator><creator><name>Kashyap V.L.</name></creator><creator><name>Lauer J.</name></creator><creator><name>McCollough M.L.,McDowell J.C.</name></creator><creator><name>Miller J.B.</name></creator><creator><name>Mitschang A.W.</name></creator><creator><name>Morgan D.L.</name></creator><creator><name>Mossman A.E.,Nichols J.S.</name></creator><creator><name>Nowak M.A.</name></creator><creator><name>Plummer D.A.</name></creator><creator><name>Refsdal B.L.</name></creator><creator><name>Rots A.H.,Siemiginowska A.</name></creator><creator><name>Sundheim B.A.</name></creator><creator><name>Tibbetts M.S.</name></creator><creator><name>Van Stone D.W.,Winkelman S.L.</name></creator><creator><name>Zografou P.</name></creator><date role="Updated">2017-06-28T06:57:54Z</date><date role="Created">2014-03-01T06:42:49Z</date><contact><name>CDS support team</name><address>CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France</address><email>cds-question@unistra.fr</email></contact></curation><content><subject>x-ray-sources</subject><subject>surveys</subject><description>The Chandra Source Catalog (CSC) is a general purpose virtual X-ray astrophysics facility that provides access to a carefully selected set of generally useful quantities for individual X-ray sources, and is designed to satisfy the needs of a broad-based group of scientists, including those who may be less familiar with astronomical data analysis in the X-ray regime. The first release of the CSC includes information about 94,676 distinct X-ray sources detected in a subset of public Advanced CCD Imaging Spectrometer imaging observations from roughly the first eight years of the Chandra mission. This release of the catalog includes point and compact sources with observed spatial extents &lt;~30''. The catalog (1) provides access to the best estimates of the X-ray source properties for detected sources, with good scientific fidelity, and directly supports scientific analysis using the individual source data; (2) facilitates analysis of a wide range of statistical properties for classes of X-ray sources; and (3) provides efficient access to calibrated observational data and ancillary data products for individual X-ray sources, so that users can perform detailed further analysis using existing tools. The catalog includes real X-ray sources detected with flux estimates that are at least 3 times their estimated 1-{sigma} uncertainties in at least one energy band, while maintaining the number of spurious sources at a level of &lt;~1 false source per field for a 100ks observation. For each detected source, the CSC provides commonly tabulated quantities, including source position, extent, multi-band fluxes, hardness ratios, and variability statistics, derived from the observations in which the source is detected. In addition to these traditional catalog elements, for each X-ray source the CSC includes an extensive set of file-based data products that can be manipulated interactively, including source images, event lists, light curves, and spectra from each observation in which a source is detected.</description><source format="bibcode">2010ApJS..189...37E</source><referenceURL>https://cdsarc.cds.unistra.fr/viz-bin/cat/IX/45</referenceURL><type>Catalog</type><contentLevel>Research</contentLevel><relationship><relationshipType>IsServedBy</relationshipType><relatedResource ivo-id="ivo://CDS.VizieR/TAP">TAP VizieR generic service</relatedResource></relationship><relationship><relationshipType>IsServedBy</relationshipType><relatedResource>Conesearch service</relatedResource></relationship><relationship><relationshipType>related-to</relationshipType><relatedResource>http://cxc.cfa.harvard.edu/csc/ : The Chandra Source Catalog Home Page</relatedResource><relatedResource 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46648 46649 46651 46729 46732 46753 46810 46811 46832 46833 46910 46911 46924 46987 46997 47007 47027 47029 47043 47047 47050 47053 47058 47064 47078 47080 47117 47125 47127 47168 47188 47190 47204 47205 47206 47216 47217 47219 47375 47377 47386 47391 47397 47424 47434 47454 47455 47735 47740 47741 47742 47755 47777 47824 47825 47828 47854 47855 47865 47866 47868 47941 47970 47971 48035 48070 48071 48076 48105 48107 48108 48163 48169 48174 48186 48193 48272 48317 48319 48330 48388 48389 48390 48423 48434 48440 48473 48475 48476 48478 48479 48483 48498 48500 48501 48503 48612 48614 48684 48685 48686 48757 48891 48961 48963 49012 49014 49020 49021 49023 49094 49095 49099 49100 49106 49125 49127</spatial><footprint ivo-id="ivo://ivoa.net/std/moc">https://cdsarc.cds.unistra.fr/viz-bin/moc/IX/45?format=ascii</footprint><waveband>X-ray</waveband></coverage><tableset><schema><name>default</name><table><name>IX/45/csc11</name><description>The Chandra Source Catalog, Version 1.1</description><column><name>recno</name><description>Record number assigned by the VizieR team. Should Not be used for identification.</description><ucd>meta.record</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>CXO</name><description>Chandra source name (JHHMMSS.s+DDMMSS)</description><ucd>meta.id;meta.main</ucd><dataType xsi:type="vs:VOTableType" arraysize="16*">char</dataType></column><column><name>RAJ2000</name><description>Right ascension (ICRS) of Chandra source (ra)</description><unit>deg</unit><ucd>pos.eq.ra;meta.main</ucd><flag>indexed</flag></column><column><name>DEJ2000</name><description>Declination (ICRS) of Chandra source (dec)</description><unit>deg</unit><ucd>pos.eq.dec;meta.main</ucd><flag>indexed</flag></column><column><name>ePos</name><description>[0.03/158] Position error radius at 95% confidence level (err_ellipse_r0)</description><unit>arcsec</unit><ucd>stat.error;phys.angSize</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>S/N</name><description>[3/] Source flux significance (highest) (significance)</description><ucd>stat.fit.goodness</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>Fb</name><description>? Aperture-corrected ACIS net energy flux (flux_aper_b) (1)</description><unit>mW.m**-2</unit><ucd>phot.flux;em.X-ray</ucd><dataType xsi:type="vs:VOTableType">double</dataType><flag>nullable</flag></column><column><name>b_Fb</name><description>? Lower limit of Fb (flux_aper_lolim_b) (4)</description><unit>mW.m**-2</unit><ucd>phot.flux;em.X-ray;stat.min</ucd><dataType xsi:type="vs:VOTableType">double</dataType><flag>nullable</flag></column><column><name>B_Fb</name><description>? Upper limit of Fb (flux_aper_hilim_b) (4)</description><unit>mW.m**-2</unit><ucd>phot.flux;em.X-ray;stat.max</ucd><dataType xsi:type="vs:VOTableType">double</dataType><flag>nullable</flag></column><column><name>Fw</name><description>? Aperture-corrected HRC net energy flux (flux_aper_w) (1)</description><unit>mW.m**-2</unit><ucd>phot.flux;em.X-ray</ucd><dataType xsi:type="vs:VOTableType">double</dataType><flag>nullable</flag></column><column><name>b_Fw</name><description>? Lower limit of Fw (flux_aper_lolim_w)</description><unit>mW.m**-2</unit><ucd>phot.flux;em.X-ray;stat.min</ucd><dataType xsi:type="vs:VOTableType">double</dataType><flag>nullable</flag></column><column><name>B_Fw</name><description>? Upper limit of Fw (flux_aper_hilim_w)</description><unit>mW.m**-2</unit><ucd>phot.flux;em.X-ray;stat.max</ucd><dataType xsi:type="vs:VOTableType">double</dataType><flag>nullable</flag></column><column><name>hr2</name><description>[-1/1]? "hard" hardness ratio (Fh-Fm)/Fb (hard_hm) (1)</description><ucd>phot.flux;arith.ratio</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>b_hr2</name><description>[-1/1]? Lower limit of hr2 (hard_hm_lolim)</description><ucd>meta.note</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>B_hr2</name><description>[-1/1]? Upper limit of hr2 (hard_hm_hilim)</description><ucd>meta.note</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>hr1</name><description>[-1/1]? "soft" hardness ratio (Fm-Fs)/Fb (hard_ms) (1)</description><ucd>phot.flux;arith.ratio</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>b_hr1</name><description>[-1/1]? Lower limit of hr1 (hard_ms_lolim)</description><ucd>meta.note</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>B_hr1</name><description>[-1/1]? Upper limit of hr1 (hard_ms_hilim)</description><ucd>meta.note</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>fc</name><description>[0/1] Confusion flag (conf_flag) (2)</description><ucd>meta.code</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>fe</name><description>[0/1] Extension flag (extent_flag) (2)</description><ucd>meta.code</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>fs</name><description>[0/1] Saturation flag (sat_src_flag) (2)</description><ucd>meta.code</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>Vab</name><description>[0/10]? ACIS intra-observation variability (var_intra_index_b) (3)</description><ucd>src.var.index</ucd><dataType xsi:type="vs:VOTableType">int</dataType><flag>nullable</flag></column><column><name>Vib</name><description>[0/8]? ACIS inter-observation variability (var_inter_index_b) (3)</description><ucd>src.var.index</ucd><dataType xsi:type="vs:VOTableType">int</dataType><flag>nullable</flag></column><column><name>Vaw</name><description>[0/10]? HRC intra-observation variability (var_intra_index_w) (3)</description><ucd>src.var.index</ucd><dataType xsi:type="vs:VOTableType">int</dataType><flag>nullable</flag></column><column><name>Viw</name><description>[0/8]? HRC inter-observation variability (var_inter_index_w) (3)</description><ucd>src.var.index</ucd><dataType xsi:type="vs:VOTableType">int</dataType><flag>nullable</flag></column></table></schema></tableset></ri:Resource>