J/AJ/141/120ivo://CDS.VizieR/J/AJ/141/120doi:10.26093/cds/vizier.51410120CDSRichardson N.D.Morrison N.D.Gies D.R.Markova N.Hesselbach E.N.,Percy J.R.2020-09-23T05:52:11Z2012-08-21T13:02:05ZCDS support team

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

cds-question@unistra.frvariable-starsspectroscopyvisible-astronomyh-alpha-photometryP Cygni is a prototype of the luminous blue variables (or S Doradus variables), and the star displays photometric and emission line variability on a timescale of years (known as the "short S Doradus-phase" variations). Here we present new high-resolution H{alpha} spectroscopy of P Cyg that we combine with earlier spectra and concurrent V-band photometry to document the emission and continuum flux variations over a 24 year time span.2011AJ....141..120Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/141/120CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/AJ/139/2269 : P Cyg H{alpha} squared visibility (Balan+, 2010)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/141/120https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/141/120http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/141/120https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/141/120https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/141/120http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/141/120GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapAssociated datahttps://cdsarc.cds.unistra.fr/assocdata/?obs_collection=J/AJ/141/120OpticaldefaultJ/AJ/141/120/table1H{alpha} MeasurementsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintWnetNet adjusted H{alpha} equivalent width ({AA})0.1nmspect.line.eqWidth;src.netfloatVmag? Averaged V band magnitudemagphot.mag;em.opt.VfloatnullableWcorr? Flux corrected H{alpha} equivalent width ({AA})0.1nmspect.line.eqWidthfloatnullableIp? Normalized peak intensity above continuum levelphot.flux;em.opt;arith.ratiofloatnullableFWHMFull-Width at Half-Maximum of emission portionkm/sspect.line.widthfloatDRVRelative radial velocity (1)km/sspect.dopplerVelocfloatRVminMinimum flux velocity estimatekm/sspect.dopplerVelocfloatRV.C? Discrete Absorption Component radial velocitykm/sspect.dopplerVelocfloatnullableEW.C? Discrete Absorption Component equivalent width (in Angstroms)0.1nmspect.line.eqWidthfloatnullableHJDHeliocentric Julian Datedtime.epochdoubleJ/AJ/141/120/spectraList of FITS spectrarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJD? Observation datedtime.epochdoublenullableFileNameName of the spectrum file in subdirectory fits (wavelength range: 652.8 to 660nm)meta.id;meta.filecharspplot of the spectrummeta.ref.urlchar