J/MNRAS/399/2139ivo://CDS.VizieR/J/MNRAS/399/2139doi:10.26093/cds/vizier.73992139CDSSiviero A.Munari U.Dallaporta S.Valisa P.Luppi V.Moretti S.,Tomaselli S.Bacci S.Ballardini F.Cherini G.Graziani M.Frigo A.,Vagnozzi A.2024-07-09T20:15:53Z2011-09-12T14:28:17ZCDS support team

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

cds-question@unistra.frvariable-starscataclysmic-variable-starsinfrared-photometryvisible-astronomybroad-band-photometryIn this paper, we discuss the early phases of the ongoing outburst that CI Cyg, a prototype symbiotic star, is currently undergoing after 30-year quiescence. We have tightly monitored CI Cyg in B V R_C_ I_C_ bands, starting a whole year before the onset of the outburst, and in addition we obtained numerous Echelle high- and low-resolution absolutely flux-calibrated spectra. The outburst started while the accreting white dwarf (WD) was being eclipsed by the Roche lobe filling M giant companion, and it was discovered during the egress phase on the second half of 2008 August. The system reached peak V-band brightness in early 2008 October and has been characterized by amplitudes {delta}B=1.9, {delta}V=1.5, {delta}R_C_=0.9, {delta}I_C_=0.4mag. At maximum V-band brightness, the outbursting WD had expanded to closely resemble an F3 II/Ib star, with MV=-3.5, Teff~6900K and R=28R_{sun}_. The high-ionization emission lines ([NeV], [FeVII], HeII) disappeared and only lower ionization lines were visible. Balmer and He I emission lines declined in equivalent width but increased in absolute flux. The output radiated by the hot component during the outburst corresponds to nuclear burning proceeding at a 2x10^-8^M_{sun}_/yr rate.2009MNRAS.399.2139Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/399/2139CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/399/2139https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/399/2139http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/399/2139https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/399/2139https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/399/2139http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/399/2139GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tap3.322582951404819e-19 3.852589004194616e-19OpticalInfrareddefaultJ/MNRAS/399/2139/table1BVRcIc photometry of CI CygObsObservation code (1)meta.code;obscharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian datedtime.epochdoubleVmagJohnson V magnitudemagphot.mag;em.opt.Vfloate_Vmagrms uncertainty on Vmagmagstat.error;phot.mag;em.opt.VfloatB-V? Johnson B-V colour indexmagphot.color;em.opt.B;em.opt.Vfloatnullablee_B-V? rms uncertainty on B-Vmagstat.error;phot.color;em.opt.BfloatnullableV-Rc? Johnson-Cousins V-R colour indexmagphot.color;em.opt.V;em.opt.Rfloatnullablee_V-Rc? rms uncertainty on V-Rcmagstat.error;phot.color;em.opt.VfloatnullableV-Ic? Johnson-Cousins V-I colour indexmagphot.color;em.opt.V;em.opt.Ifloatnullablee_V-Ic? rms uncertainty on V-Icmagstat.error;phot.color;em.opt.Vfloatnullable