J/AJ/147/7ivo://CDS.VizieR/J/AJ/147/7doi:10.26093/cds/vizier.51470007CDSOdell A.P.2017-09-29T09:02:54Z2014-10-16T07:24:05ZCDS support team

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

cds-question@unistra.fropen-star-clustersspectroscopyccd-photometryvisible-astronomymedium-band-photometryradial-velocityWe use CCD and photoelectric photometry with Stromgren filters along with medium resolution spectra to investigate NGC 6520, an open cluster very nearly in the direction of the galactic center. We find an age of 60Myr, a distance of 2kpc, and an average reddening E(b-y)=0.295, which increases toward the south. The average heliocentric radial velocity of the B stars is -29km/s, while the velocity of the nearby Barnard 86 is about 0 (heliocentric; -11km/s compared to the LSR). This velocity difference amounts to about 1.8kpc since the cluster formed, implying that it is extremely doubtful NGC6520 is related to Barnard 86.2014AJ....147....7Ohttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/147/7CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/118 : NGC 2000.0 (Sky Publishing, ed. Sinnott 1988)VII/1 : Revised New General Catalogue (Sulentic+, 1973)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/147/7https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/147/7http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/147/7https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/147/7https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/147/7http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/147/7GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/147/7/table1 (NGC 6520 photometry and spectroscopy results)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/147/7/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/147/7/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/147/7/table1?GETtext/xml+votable180.050000true270.8-27.86250.005555555555555556Cone search capability for table J/AJ/147/7/list (List of fits files)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/147/7/list?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/147/7/list?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/147/7/list?GETtext/xml+votable180.050000true270.806625-27.87427780.005555555555555556Associated datahttps://cdsarc.cds.unistra.fr/assocdata/?obs_collection=J/AJ/147/76/9847 12865 13258 13559 13984 28868 28870 311213.322582951404819e-19 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/147/7?format=asciiOpticaldefaultJ/AJ/147/7/table1NGC 6520 photometry and spectroscopy resultsSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintZug[1/50]? The Zug (1937LicOB..18...89Z) numbermeta.id;meta.mainintnullableprimarySpindicates spectra availablemeta.ref.urlcharHayThe Hayford (1932LicOB..16...53H) identifiermeta.idcharRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainVmagThe V band magnitude (derived from y) (1)magphot.mag;em.opt.Vfloatb-yStromgren (b-y) color indexmagphot.color;em.opt.B;em.opt.Vfloatm1? The m_1_ color index (2)magphot.colorfloatnullablec1? The c_1_ color index (2)magphot.colorfloatnullable(b-y)0? Intrinsic Stromgren (b-y) color indexmagphot.color;em.opt.B;em.opt.VfloatnullableV0mag? Intrinsic V band magnitudemagphot.mag.reddFree;em.opt.VfloatnullableE(B-V)? The (B-V) color excessmagphot.color.excessfloatnullablef_E(B-V)[*] Extinction found from a plane fit to B stars extinction (see section 3.1)meta.codecharSpTSpectral typesrc.spTypecharRV? Radial velocitykm/sphys.veloc;pos.heliocentricintnullableMm[N] Likely not a cluster member (see Section 3.3)meta.code.membercharJ/AJ/147/7/listList of fits filesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right Ascension J2000pos.eq.ra;meta.mainDEJ2000Declination J2000pos.eq.dec;meta.mainDateObsObservation datetime.epoch;obsnullableSpSimbad column added by the CDSmeta.ref.urlcharFileNameName of FITS file in subdirectory fits (1)meta.id;meta.fitscharFITSDownload the FITS filemeta.ref.urlcharZug[1/50]? The Zug numbermeta.id;meta.mainintnullablen_ZugNote on Zug numbermeta.notecharHayThe Hayford (1932LicOB..16...53H) identifiermeta.idcharn_HayNote on Hayford identifiermeta.notecharSkiff[7/10]? The Skiff numbermeta.idintnullableNameCommon star namemeta.id