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<ri:Resource created="2000-11-16T15:40:34Z" 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>H-alpha in Abell 2390</title><shortName>J/MNRAS/318/703</shortName><identifier>ivo://CDS.VizieR/J/MNRAS/318/703</identifier><altIdentifier>doi:10.26093/cds/vizier.73180703</altIdentifier><curation><publisher ivo-id="ivo://CDS">CDS</publisher><creator><name>Balogh M.L.</name></creator><creator><name>Morris S.L.</name></creator><date role="Updated">2024-06-27T20:17:12Z</date><date role="Created">2000-11-16T15:40:34Z</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>galaxy-clusters</subject><subject>visible-astronomy</subject><subject>h-alpha-photometry</subject><description>Photometry is tabulated for 1189 galaxies in 19 OSIS-V (CFHT) images in the direction of the galaxy cluster Abell 2390. The images cover 270 sq. deg., and extend out to the virial radius of the cluster. Three narrow filters are used to determine the flux above the continuum between wavelengths 7897 and 8245 {AA}, corresponding to H-alpha at 0.2033&lt;z&lt;0.2563. The absolute flux values are uncertain by about 30% due to zero point uncertainty; we also tabulate the equivalent width which is independent of this zero point. Only strong emission line cluster members (equivalent width greater than about 50{AA}) are detectable, by design. 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Should Not be used for identification.</description><ucd>meta.record</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>Name</name><description>Name of field used for the photometry</description><ucd>obs.field</ucd><dataType xsi:type="vs:VOTableType" arraysize="3*">char</dataType></column><column><name>Xpos</name><description>X coordinate on CCD</description><unit>pix</unit><ucd>pos.cartesian.x;instr.det</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>Ypos</name><description>Y coordinate on CCD</description><unit>pix</unit><ucd>pos.cartesian.y;instr.det</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>RAJ2000</name><description>Right ascension J2000</description><unit>deg</unit><ucd>pos.eq.ra;meta.main</ucd></column><column><name>DEJ2000</name><description>Declination J2000</description><unit>deg</unit><ucd>pos.eq.dec;meta.main</ucd></column><column><name>dRA</name><description>J2000 R.A. difference from BCG (1)</description><unit>arcsec</unit><ucd>pos.eq.ra;arith.diff</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>dDE</name><description>J2000 Dec. difference from BCG (1)</description><unit>arcsec</unit><ucd>pos.eq.dec;arith.diff</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>rmag</name><description>Gunn R magnitude</description><unit>mag</unit><ucd>phot.mag;em.opt.R</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>e_rmag</name><description>Uncertainty in R</description><unit>mag</unit><ucd>stat.error</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>Rcorr</name><description>Corrected R magnitude (2)</description><unit>mag</unit><ucd>phot.mag;em.opt.R</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>flux</name><description>H-alpha flux (3)</description><unit>Jy</unit><ucd>phot.flux.density;em.IR</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>e_flux</name><description>Uncertainty in flux</description><unit>Jy</unit><ucd>stat.error</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>EW</name><description>H-alpha equivalent width (3)</description><unit>0.1nm</unit><ucd>spect.line.eqWidth</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>e_EW</name><description>Uncertainty in EW</description><unit>0.1nm</unit><ucd>stat.error</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>flag</name><description>[0,3] SExtractor Photometry flag (4)</description><ucd>meta.code</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>Wcor</name><description>Incompleteness magnitude correction</description><unit>mag</unit><ucd>phot.mag;arith.diff</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>ppp</name><description>? Galaxy number in Abraham =1996ApJ...471..694A</description><ucd>meta.id</ucd><dataType xsi:type="vs:VOTableType">int</dataType><flag>nullable</flag></column><column><name>CM</name><description>? Cluster membership</description><ucd>meta.code.member</ucd><dataType xsi:type="vs:VOTableType" arraysize="3*">char</dataType></column></table></schema></tableset></ri:Resource>