J/AJ/112/2500ivo://CDS.VizieR/J/AJ/112/2500doi:10.26093/cds/vizier.51122500CDSMcLean I.S.Teplitz H.2023-04-06T16:50:22Z1998-08-31T13:20:21ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frgalaxy-clustersinfrared-photometryDeep near-infrared images of four intermediate redshift (z=0.2-0.4) clusters (Abell 370, Abell 963, CL 0024+1654 and CL 0909+4408) have been obtained in the J, H, and K bands using the UCLA Two-Channel IR Camera with a spatial resolution of ~1". The 3'x3' field of view includes over 100 galaxies in each cluster. Photometry has been obtained with 1{sigma} or limiting magnitudes of 21.7 at J, 21.0 at H, and 20.4 at K', and complete to 2 magnitudes fainter than L^*^. Data reduction techniques for flat-fielding object identification, and photometry of faint object crowded fields are discussed. The best method is the subtraction of a running-average sky made from object frames. The photometry is cross referenced to previous catalogs, and infrared color-magnitude diagrams are presented. Comparison of the IR colors of these four clusters to the predictions of the spectral synthesis models of Bruzual and Chariot is discussed. There is a discrepancy between the models and the observations of several tenths of a magnitude in the colors. Photometry has also been obtained for the gravitational lensing arcs in CL 0024+1654, which is consistent with an actively star-forming galaxy at z>1. For a description of the JHK' photometric system, see e.g. <GCPD/09>1996AJ....112.2500Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/112/2500CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/112/2500https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/112/2500http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/112/2500https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/112/2500https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/112/2500http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/112/2500GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapInfrareddefaultJ/AJ/112/2500/table3JHK' photometry of Abell 370.recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNoObject number in clustermeta.id;meta.mainintBO? Butcher and Oemler (1978ApJ...219...18B) numbermeta.idintnullablexposx position (1)pixpos.cartesian.x;instr.detfloatyposy position (1)pixpos.cartesian.y;instr.detfloatn_ypos[a] Note (2)meta.notecharJmagJ magnitude (1.2um)magphot.mag;em.IR.Jfloatn_Jmag[a] Note (2)meta.notecharHmag? H magnitude (1.65um)magphot.mag;em.IR.HfloatnullableK'magK' magnitude (2.1um)magphot.mag;em.IR.KfloatJ/AJ/112/2500/table4JHK' photometry of CL 0024+1654recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNoObject number in clustermeta.id;meta.mainintDG? Dressler and Gunn (1992, Cat. <J/ApJS/78/1>) numbermeta.idintnullablexposx position (1)pixpos.cartesian.x;instr.detfloatyposy position (1)pixpos.cartesian.y;instr.detfloatn_ypos[a] Note (2)meta.notecharJmagJ magnitude (1.2um)magphot.mag;em.IR.Jfloatn_Jmag[a] Note (2)meta.notecharHmag? H magnitude (1.65um)magphot.mag;em.IR.HfloatnullableK'magK' magnitude (2.1um)magphot.mag;em.IR.KfloatJ/AJ/112/2500/table5JHK' Photometry of Abell 963.n_ypos[a] Note (2)meta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNoObject number in clustermeta.id;meta.mainintBO? Butcher and Oemler (1978ApJ...219...18B) numbermeta.idintnullablexposx position (1)pixpos.cartesian.x;instr.detfloatyposy position (1)pixpos.cartesian.y;instr.detfloatJmagJ magnitude (1.2um)magphot.mag;em.IR.Jfloatn_Jmag[a] Note (2)meta.notecharHmag? H magnitude (1.65um)magphot.mag;em.IR.HfloatnullableK'magK' magnitude (2.1um)magphot.mag;em.IR.KfloatJ/AJ/112/2500/table6JHK' photometry of CL 0909+4408DG? Dressler and Gunn (1992, Cat. <J/ApJS/78/1>) numbermeta.idintnullablexposx position (1)pixpos.cartesian.x;instr.detfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNoObject number in clustermeta.id;meta.mainintyposy position (1)pixpos.cartesian.y;instr.detfloatn_ypos[a] Note (2)meta.notecharJmagJ magnitude (1.2um)magphot.mag;em.IR.Jfloatn_Jmag[a] Note (2)meta.notecharHmag? H magnitude (1.65um)magphot.mag;em.IR.HfloatnullableK'magK' magnitude (2.1um)magphot.mag;em.IR.Kfloat