J/PASP/123/1062ivo://CDS.VizieR/J/PASP/123/1062doi:10.26093/cds/vizier.61231062CDSMcKeever J.Lutz J.Wallerstein G.Munari U.Siviero A.2025-09-09T14:14:03Z2014-03-06T15:49:16ZCDS support team

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

cds-question@unistra.frvariable-starsspectroscopyBF Cygni (hereafter BF Cyg) is a symbiotic star that in 2006 July started into an optical outburst that has lasted for several years. Between 2006 August and 2007 January we obtained high-dispersion spectra (r~35,000) over the wavelength range of 3800-10000{AA} of BF Cyg with the 3.5m echelle spectrograph at Apache Point Observatory. The emission lines in the optical spectrum of BF Cyg changed dramatically during the interval of observations. The species found were mostly low-ionization emission lines of H, He, C, N, O, Mg, Si, Ca, Sc, Ti, V, Cr, Mn, Fe, and Ni. Both permitted and forbidden lines were seen. In particular, Fe I was observed in emission, which is not a common phenomenon.2011PASP..123.1062Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/PASP/123/1062CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/PASP/123/1062https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/PASP/123/1062http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/PASP/123/1062https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/PASP/123/1062https://vizier.iucaa.in/viz-bin/votable?-source=J/PASP/123/1062http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/PASP/123/1062GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/PASP/123/1062/table3List of emission lines found in 2006 October 3 spectrum of BF CygrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlam.obsObserved Wavelength {lambda}_obs_ ({AA})0.1nmem.wldoubleIonIon (element and ionisation)phys.atmol.ionStagecharMultMultipletphys.atmol.levelcharlam.labLaboratory Wavelength {lambda}_lab_0.1nmem.wldoubleRVRadial velocitykm/sphys.veloc;pos.heliocentricfloatNotesLine pecularity (1)meta.notecharJ/PASP/123/1062/table4Prominent absorption lines found in 2007 January 28 spectrum of BF CygrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlam.obOObserved Wavelength {lambda}_obs_ ({AA})0.1nmem.wlfloatIonIon (element and ionisation)phys.atmol.ionStagecharMultMultipletphys.atmol.levelcharlam.labLaboratory Wavelength {lambda}_lab_0.1nmem.wlfloatRVRadial velocitykm/sphys.veloc;pos.heliocentricfloatEWEquivalent width0.1nmspect.line.eqWidthfloat