J/BaltA/17/125ivo://CDS.VizieR/J/BaltA/17/125CDSStraizys V.Corbally C.J.Laugalys V.2017-09-19T14:20:54Z2008-12-28T09:30:52ZCDS support team

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

cds-question@unistra.frh-ii-regionsinfrared-photometryThe slope of the interstellar reddening line in the J-H vs. H-Ks diagram of the 2MASS survey in the direction of the North America and Pelican nebulae, the L 935 dust cloud and the Cyg OB2 association is determined. The MK types were either classified by C.J. Corbally or collected from the literature. The ratio E(J-H)/E(H-Ks)=2.0 is obtained by taking the average for the four groups of spectral classes: O3-B1, B2-B6, B7-B9.5 and red clump giants. The obtained ratio is among the largest values of E(J-H)/E(H-Ks) determined till now.2008BaltA..17..125Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/BaltA/17/125CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/BaltA/17/125https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/BaltA/17/125http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/BaltA/17/125https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/BaltA/17/125https://vizier.iucaa.in/viz-bin/votable?-source=J/BaltA/17/125http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/BaltA/17/125GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/BaltA/17/125/table1 (O-B stars in the vicinity of the North America and Pelican nebulae and in the Cyg OB2 association)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/BaltA/17/125/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/BaltA/17/125/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/BaltA/17/125/table1?GETtext/xml+votable180.050000true310.245583345.78311110.0055555555555555565/3673 3840 3842 6/14670 14671 14677 14679 14683 14684 14685 14711 15365 15366 15367 15372 15373 15374 15392 15393 15394https://cdsarc.cds.unistra.fr/viz-bin/moc/J/BaltA/17/125?format=asciiInfrareddefaultJ/BaltA/17/125/table1O-B stars in the vicinity of the North America and Pelican nebulae and in the Cyg OB2 associationrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintr_Name[bMC] Reference for Cyg OB2 objects (1)meta.ref;pos.framecharNameStar name (2)meta.id;meta.maincharn_Name[*] * indicates a note in notes.dat filemeta.notecharBD/HDBD or HD namemeta.idcharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainVmag? V magnitudemagphot.mag;em.opt.VfloatnullableSpTypeMK spectral typesrc.spTypecharr_SpTypeReference for SpType (3)meta.ref;pos.framecharJ-H? 2MASS J-H colour indexmagphot.color;em.IR.J;em.IR.HfloatnullableH-Ks? 2MASS H_Ks colour indexmagphot.color;em.IR.H;em.IR.KfloatnullableSimbadNameSimbad column added by the CDSmeta.idchar2MDetails from 2MASS catalog (Cutri et al. 2003, Cat. II/246)meta.ref.urlcharJ/BaltA/17/125/notesIndividual notesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar namemeta.id;meta.maincharNoteText of the note (1)meta.notechar