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<ri:Resource created="2010-02-11T11:22:12Z" 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 2dF Galaxy Redshift Survey (2dFGRS)</title><shortName>VII/250</shortName><identifier>ivo://CDS.VizieR/VII/250</identifier><curation><publisher ivo-id="ivo://CDS">CDS</publisher><creator><name>Colless M.</name></creator><creator><name>Dalton G.</name></creator><creator><name>Maddox S.</name></creator><creator><name>Sutherland W.</name></creator><creator><name>Norberg P.</name></creator><creator><name>Cole S.,Bland-Hawthorn J.</name></creator><creator><name>Bridges T.</name></creator><creator><name>Cannon R.</name></creator><creator><name>Collins C.</name></creator><creator><name>Couch W.</name></creator><creator><name>Cross N.,Deeley K.</name></creator><creator><name>de Propris R.</name></creator><creator><name>Driver S.P.</name></creator><creator><name>Efstathiou G.</name></creator><creator><name>Ellis R.S.,Frenk C.S.</name></creator><creator><name>Glazebrook K.</name></creator><creator><name>Jackson C.</name></creator><creator><name>Lahav O.</name></creator><creator><name>Lewis I.</name></creator><creator><name>Lumsden S.,Madgwick D.</name></creator><creator><name>Peacock J.A.</name></creator><creator><name>Peterson B.A.</name></creator><creator><name>Price I.</name></creator><creator><name>Seaborne M.</name></creator><creator><name>Taylor K.</name></creator><date role="Updated">2017-06-22T14:29:18Z</date><date role="Created">2010-02-11T11:22:12Z</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>surveys</subject><subject>galaxies</subject><subject>catalogs</subject><subject>redshifted</subject><subject>photometry</subject><description>The 2dF Galaxy Redshift Survey (2dFGRS) is a major spectroscopic survey taking full advantage of the unique capabilities of the 2dF facility built by the Anglo-Australian Observatory. The 2dFGRS is integrated with the 2dF QSO survey (2QZ, Cat. VII/241). The 2dFGRS obtained spectra for 245591 objects, mainly galaxies, brighter than a nominal extinction-corrected magnitude limit of b_J_=19.45. Reliable (quality&gt;=3) redshifts were obtained for 221414 galaxies. The galaxies cover an area of approximately 1500 square degrees selected from the extended APM Galaxy Survey in three regions: a North Galactic Pole (NGP) strip, a South Galactic Pole (SGP) strip, and random fields scattered around the SGP strip. Redshifts are measured from spectra covering 3600-8000 Angstroms at a two-pixel resolution of 9.0 Angstrom and a median S/N of 13 per pixel. All redshift identifications are visually checked and assigned a quality parameter Q in the range 1-5; Q&gt;=3 redshifts are 98.4% reliable and have an rms uncertainty of 85 km/s. The overall redshift completeness for Q&gt;=3 redshifts is 91.8% but this varies with magnitude from 99% for the brightest galaxies to 90% for objects at the survey limit. The 2dFGRS data base is available on the World Wide Web at http://www.mso.anu.edu.au/2dFGRS/.</description><source format="bibcode">2001MNRAS.328.1039C</source><referenceURL>https://cdsarc.cds.unistra.fr/viz-bin/cat/VII/250</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://www.mso.anu.edu.au/2dFGRS/ : The 2dF Galaxy Redshift Survey Home Page</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/VII/241">VII/241 : The 2dF QSO Redshift Survey (Croom+ 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Spectral type parameter (ETA_TYPE) (G1)</description><ucd>stat.fit.param</ucd><dataType xsi:type="vs:VOTableType">double</dataType><flag>nullable</flag></column><column><name>Pl</name><description>[0,1]? 2dF plate (0 or 1) (PLATE)</description><ucd>meta.note</ucd><dataType xsi:type="vs:VOTableType">int</dataType><flag>nullable</flag></column><column><name>e</name><description>Eccentricity of the image (ECCENT)</description><ucd>src.orbital.eccentricity</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>ora</name><description>[0,180[ Orientation angle E-(N)-W (ORIENT)</description><unit>deg</unit><ucd>pos.posAng</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>jon</name><description>? Eyeball classification (JON) (G3)</description><ucd>src.morph</ucd><dataType xsi:type="vs:VOTableType">int</dataType><flag>nullable</flag></column><column><name>area</name><description>Isophotal area in pixels (AREA)</description><unit>pix</unit><ucd>phys.angSize</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>_RA.icrs</name><description>Right ascension (ICRS) (computed by VizieR, not part of the original data)</description><unit>deg</unit><ucd>pos.eq.ra</ucd><flag>nullable</flag><flag>indexed</flag></column><column><name>_DE.icrs</name><description>Declination (ICRS) (computed by VizieR, not part of the original data)</description><unit>deg</unit><ucd>pos.eq.dec</ucd><flag>nullable</flag><flag>indexed</flag></column></table><table><name>VII/250/photo</name><description>Photometric catalog</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>SeqNum</name><description>Database serial number (SEQNUM)</description><ucd>meta.id</ucd><dataType xsi:type="vs:VOTableType">int</dataType><flag>indexed</flag></column><column><name>RAB1950</name><description>Right Ascension B1950</description><ucd>pos.eq.ra;meta.main</ucd><flag>indexed</flag></column><column><name>DEB1950</name><description>Declination B1950</description><ucd>pos.eq.dec;meta.main</ucd><flag>indexed</flag></column><column><name>Bjsel</name><description>Final bj magnitude with extinction correction (BJSEL) (G2)</description><unit>mag</unit><ucd>phot.mag;em.opt.B</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>psi</name><description>psi classification parameter (PROB) (2)</description><ucd>src.morph.param</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>k</name><description>k classification parameter = k/k_star (PARK)</description><ucd>src.morph.param</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>mu</name><description>mu classification parameter = mu/mu_star (PARMU)</description><ucd>src.morph.param</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>Cl</name><description>[-4,2] Final classification (IGAL) (3)</description><ucd>src.class.starGalaxy</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>jon</name><description>[0,9]? Eyeball classification (JON) (G3)</description><ucd>src.morph</ucd><dataType xsi:type="vs:VOTableType">int</dataType><flag>nullable</flag></column><column><name>ora</name><description>[0,180[ Orientation angle E-(N)-W (ORIENT)</description><unit>deg</unit><ucd>pos.posAng</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>e</name><description>Eccentricity (ECCENT)</description><ucd>src.orbital.eccentricity</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>Area</name><description>Isophotal area in pixels (AREA)</description><unit>pix</unit><ucd>phys.area</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>Xpos</name><description>Bj plate position in 8 micron pixels (X_BJ)</description><unit>pix</unit><ucd>pos.cartesian.x;instr.plate</ucd><dataType xsi:type="vs:VOTableType">double</dataType></column><column><name>Ypos</name><description>Bj plate position in 8 micron pixels (Y_BJ)</description><unit>pix</unit><ucd>pos.cartesian.y;instr.plate</ucd><dataType xsi:type="vs:VOTableType">double</dataType></column><column><name>dX</name><description>? Distortion difference (X(Bj)-X(R))*100 (DX)</description><unit>pix</unit><ucd>pos;arith.diff</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>dY</name><description>? Distortion difference (Y(Bj)-Y(R))*100 (DY)</description><unit>pix</unit><ucd>pos;arith.diff</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>Bjmag</name><description>Final bj magnitude (BJG) (1)</description><unit>mag</unit><ucd>phot.mag;em.opt.B</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>Rmag</name><description>Unmatched APM 'total' mag (RMAG)</description><unit>mag</unit><ucd>phot.mag;em.opt.R</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>Pmag</name><description>? Unmatched raw APM profile integrated magnitude (PMAG)</description><unit>mag</unit><ucd>phot.mag;em.opt.B</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>Fmag</name><description>? Unmatched raw APM 2" profile integrated magnitude (FMAG)</description><unit>mag</unit><ucd>phot.mag;em.opt.B</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>Smag</name><description>? Unmatched raw stellar mag from APMCAL (SMAG)</description><unit>mag</unit><ucd>phot.mag;em.opt.B</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>UKST</name><description>UKST field number (IFIELD)</description><ucd>obs.field</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>Igal</name><description>Galaxy number in UKST field (IGFIELD)</description><ucd>meta.id;obs.field</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>Name</name><description>2dFGRS assigned name (4)</description><ucd>meta.id;meta.main</ucd><dataType xsi:type="vs:VOTableType" arraysize="10*">char</dataType><flag>indexed</flag></column><column><name>Bjmag.o</name><description>Original bj magnitude (BJG_OLD) (1)</description><unit>mag</unit><ucd>phot.mag;em.opt.B</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>Bjsel.o</name><description>Original bj magnitude with extinction correction (BJSELOLD)</description><unit>mag</unit><ucd>phot.mag;em.opt.B</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>Bjmag.1</name><description>bj magnitude in 100k (VII/226) (100_BJG) (1)</description><unit>mag</unit><ucd>phot.mag;em.opt.B</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>Bjsel.1</name><description>bj magnitude in 100k release (VII/226) with extinction correction (100BJSEL)</description><unit>mag</unit><ucd>phot.mag;em.opt.B</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>_RA.icrs</name><description>Right ascension (ICRS) (computed by VizieR, not part of the original data)</description><ucd>pos.eq.ra</ucd><flag>nullable</flag><flag>indexed</flag></column><column><name>_DE.icrs</name><description>Declination (ICRS) (computed by VizieR, not part of the original data)</description><ucd>pos.eq.dec</ucd><flag>nullable</flag><flag>indexed</flag></column></table><table><name>VII/250/2dfgrs</name><description>Best observations of 2dFGRS</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>SeqNum</name><description>2dFGRS serial number (SEQNUM)</description><ucd>meta.id</ucd><dataType xsi:type="vs:VOTableType">int</dataType><flag>indexed</flag></column><column><name>o_SeqNum</name><description>[1,6] Number of spectra obtained</description><ucd>meta.number</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>Name</name><description>2dFGRS name (NAME)</description><ucd>meta.id;meta.main</ucd><dataType xsi:type="vs:VOTableType" arraysize="10*">char</dataType><flag>indexed</flag></column><column><name>UKST</name><description>UKST plate number (IFIELD)</description><ucd>obs.field</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>RAJ2000</name><description>Right ascension (J2000, hours)</description><ucd>pos.eq.ra;meta.main</ucd><flag>indexed</flag></column><column><name>DEJ2000</name><description>Declination (J2000, degrees)</description><ucd>pos.eq.dec;meta.main</ucd><flag>indexed</flag></column><column><name>Bjmag</name><description>Final bj magnitude (BJG) (1)</description><unit>mag</unit><ucd>phot.mag;em.opt.B</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>Bjsel</name><description>Final bj magnitude corrected from extinction (BJSEL) (G2)</description><unit>mag</unit><ucd>phot.mag;em.opt.B</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>Bjmag.o</name><description>Original bj magnitude (BJG_OLD) (1)</description><unit>mag</unit><ucd>phot.mag;em.opt.B</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>Bjsel.o</name><description>Original bj magnitude corrected from extinction (BJSELOLD)</description><unit>mag</unit><ucd>phot.mag;em.opt.B</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>Gext</name><description>Galactic extinction value (GALEXT)</description><unit>mag</unit><ucd>phys.absorption</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>Bjmag.S</name><description>? SuperCosmos bj magnitude (SB_BJ) (1)</description><unit>mag</unit><ucd>phot.mag;em.opt.B</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>Rmag.S</name><description>? SuperCosmos R magnitude (SR_R) (1)</description><unit>mag</unit><ucd>phot.mag;em.opt.R</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>ObsRun</name><description>Observation run of best spectrum (OBSRUN)</description><ucd>obs.param;obs</ucd><dataType xsi:type="vs:VOTableType" arraysize="5*">char</dataType></column><column><name>z.obs</name><description>? Best redshift (observed) (Z) (2)</description><ucd>src.redshift;pos.heliocentric</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>z</name><description>? Best redshift (heliocentric) (Z_HELIO) (2)</description><ucd>src.redshift</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>q_z</name><description>[1,5] Redshift quality for best spectrum (reliable redshifts have quality&gt;=3) (2)</description><ucd>meta.code.qual;src.redshift</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>n_z</name><description>Redshift type (abs=1, emi=2, man=3) (ABEMMA)</description><ucd>meta.note</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>z.abs</name><description>? Cross-correlation redshift (Z_ABS) (2)</description><ucd>src.redshift;pos.heliocentric</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>T</name><description>Cross-correlation template (KBESTR) (2)</description><ucd>stat.fit.param</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>Rx</name><description>? Cross-correlation R value (R_CRCOR) (2)</description><ucd>stat.fit.param</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>z.em</name><description>? Emission redshift (Z_EMI) (2)</description><ucd>src.redshift;pos.heliocentric</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>o_z.em</name><description>Number of emission lines for Z_EMI (NMBEST) (2)</description><ucd>meta.number</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>SNR</name><description>Median signal to noise ratio per pixel (2)</description><ucd>em.wl.central;stat.median</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>eta</name><description>? Eta spectral type parameter from best spectrum (ETA_TYPE) (G1)</description><ucd>stat.fit.param</ucd><dataType xsi:type="vs:VOTableType">double</dataType><flag>nullable</flag></column><column><name>Sp</name><description>Show the Image and annotated Spectrum of this 2dF Object</description><ucd>meta.ref.url</ucd><dataType xsi:type="vs:VOTableType" arraysize="*">char</dataType></column></table></schema></tableset></ri:Resource>