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<ri:Resource created="2009-09-26T07:56:08Z" 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>Extended Chandra Deep Field-South survey</title><shortName>J/ApJS/161/21</shortName><identifier>ivo://CDS.VizieR/J/ApJS/161/21</identifier><altIdentifier>doi:10.26093/cds/vizier.21610021</altIdentifier><curation><publisher ivo-id="ivo://CDS">CDS</publisher><creator><name>Lehmer B.D.</name></creator><creator><name>Brandt W.N.</name></creator><creator><name>Alexander D.M.</name></creator><creator><name>Bauer F.E.</name></creator><creator><name>Schneider D.P.,Tozzi P.</name></creator><creator><name>Bergeron J.</name></creator><creator><name>Garmire G.P.</name></creator><creator><name>Giacconi R.</name></creator><creator><name>Gilli R.</name></creator><creator><name>Hasinger G.,Hornschemeier A.E.</name></creator><creator><name>Koekemoer A.M.</name></creator><creator><name>Mainieri V.</name></creator><creator><name>Miyaji T.</name></creator><creator><name>Nonino M.,Rosati P.</name></creator><creator><name>Silverman J.D.</name></creator><creator><name>Szokoly G.</name></creator><creator><name>Vignali C.</name></creator><date role="Updated">2017-06-12T08:24:44Z</date><date role="Created">2009-09-26T07:56:08Z</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>active-galactic-nuclei</subject><description>We present Chandra point-source catalogs for the Extended Chandra Deep Field-South (E-CDF-S) survey. The E-CDF-S consists of four contiguous 250ks Chandra observations covering an approximately square region of total solid angle ~0.3{deg}^2^, which flank the existing ~1Ms Chandra Deep Field-South (CDF-S). The survey reaches sensitivity limits of ~1.1x10^-16^ and ~6.7x10^-16^ergs/cm^2^/s for the 0.5-2.0 and 2-8keV bands, respectively. We detect 762 distinct X-ray point sources within the E-CDF-S exposure; 589 of these sources are new (i.e., not previously detected in the ~1Ms CDF-S). This brings the total number of X-ray point sources detected in the E-CDF-S region to 915 (via the E-CDF-S and ~1Ms CDF-S observations). Source positions are determined using matched-filter and centroiding techniques; the median positional uncertainty is ~0.35". In addition to our main Chandra catalog, we constructed a supplementary source catalog containing 33 lower significance X-ray point sources that have bright optical counterparts (R&lt;23).</description><source format="bibcode">2005ApJS..161...21L</source><referenceURL>https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/161/21</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 ivo-id="ivo://CDS.VizieR/B/chandra">B/chandra : The Chandra Archive Log (CXC, 1999-)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/II/253">II/253 : Chandra Deep Field South: multi-colour data (Wolf+, 2004)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/A+A/377/442">J/A+A/377/442 : Chandra Deep Field South: R-band photometry (Wolf+, 2001)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/A+A/379/740">J/A+A/379/740 : ESO Imaging Survey (EIS) (Arnouts+, 2001)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/A+A/403/493">J/A+A/403/493 : H-band observation of Chandra Deep Field South (Moy+, 2003)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/A+A/428/1043">J/A+A/428/1043 : Redshifts from VIMOS VLT Deep Survey (Le Fevre+, 2004)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/AJ/126/539">J/AJ/126/539 : The Chandra Deep Fields North and South (Alexander+, 2003)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/ApJ/554/742">J/ApJ/554/742 : Chandra Deep Survey of the HDF-N (Hornschemeier+, 2001)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/ApJ/595/685">J/ApJ/595/685 : HST imaging in Chandra Deep Field-South (Grogin+, 2003)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/ApJS/139/369">J/ApJS/139/369 : Chandra Deep Field South. 1 Ms catalog (Giacconi+, 2002)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/ApJS/155/271">J/ApJS/155/271 : Chandra Deep Field-South: Optical spectroscopy</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/MNRAS/356/568">J/MNRAS/356/568 : Deep Chandra survey of the Groth Strip (Nandra+, 2005)</relatedResource></relationship></content><rights>https://cds.unistra.fr/vizier-org/licences_vizier.html</rights><capability><interface xsi:type="vr:WebBrowser"><accessURL use="full">https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/161/21</accessURL><mirrorURL title="VizieR at IUCAA: Pune, India">https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/161/21</mirrorURL><mirrorURL title="VizieR at SAAO: SAAO, South 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