J/AJ/141/17ivo://CDS.VizieR/J/AJ/141/17doi:10.26093/cds/vizier.51410017CDSRichardson N.D.Morrison N.D.Kryukova E.E.Adelman S.J.2017-07-03T14:27:16Z2012-08-11T18:32:10ZCDS support team

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

cds-question@unistra.frvariable-starssupergiant-starsline-intensitiesvisible-astronomymedium-band-photometryDeneb is often considered the prototypical A-type supergiant and is one of the visually most luminous stars in the Galaxy. A-type supergiants are potential extragalactic distance indicators, but the variability of these stars needs to be better characterized before this technique can be considered reliable. We analyzed 339 high-resolution echelle spectra of Deneb obtained over the five-year span of 1997 through 2001 as well as 370 Stroemgren photometric measurements obtained during the same time frame. Our spectroscopic analysis included dynamical spectra of the H{alpha} profile, H{alpha} equivalent widths, and radial velocities measured from SiII {lambda}{lambda} 6347, 6371.2011AJ....141...17Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/141/17CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/364/237 : Elemental abundances of Deneb (Albayrak+, 2000)J/A+A/400/1043 : Spectroscopic atlas of Deneb 3826-5212{AA} (Albayrak+, 2003)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/141/17https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/141/17http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/141/17https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/141/17https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/141/17http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/141/17GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/AJ/141/17/table1Spectroscopic measurements of the H{alpha} profile and Si II doubletrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian Date of observationdtime.epochdoubleHa.nH{alpha} net equivalent width (in {AA})0.1nmspect.line.eqWidth;em.line.Halpha;src.netfloatHa.eH{alpha} emission equivalent width (in {AA})0.1nmspect.line.eqWidth;em.line.HalphafloatHa.aH{alpha} absorption equivalent width (in {AA})0.1nmspect.line.eqWidth;em.line.HalphafloatV6347SiII (6347{AA}) radial velocitykm/sspect.dopplerVelocfloatV6371SiII (6371{AA}) radial velocitykm/sspect.dopplerVelocfloatsigmaThe 1{sigma} uncertainty in the radial velocitykm/sstat.errorfloatJ/AJ/141/17/table2Stromgren photometry of DenebrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian Date of observationdtime.epochdoubleumagStromgren u band magnitudemagphot.mag;em.opt.UfloatvmagStromgren v band magnitudemagphot.mag;em.opt.BfloatbmagStromgren b band magnitudemagphot.mag;em.opt.BfloatymagStromgren y band magnitudemagphot.mag;em.opt.Vfloatu-bStromgren (u-b) color indexmagphot.color;em.opt.U;em.opt.Bfloatb-yStromgren (b-y) color indexmagphot.color;em.opt.B;em.opt.Vfloatc1Stromgren c_1_ indexmagphot.colorfloatm1Stromgren m_1_ indexmagphot.colorfloat