J/MNRAS/408/181ivo://CDS.VizieR/J/MNRAS/408/181doi:10.26093/cds/vizier.74080181CDSPastorello A.Botticella M.T.Trundle C.Taubenberger S.Mattila S.,Kankare E.Elias-Rosa N.Benetti S.Duszanowicz G.Hermansson L.,Beckman J.E.Bufano F.Fraser M.Harutyunyan A.Navasardyan H.,Smartt S.J.Van Dyk S.D.Vink J.S.Wagner R.M.2024-07-12T20:14:44Z2013-09-25T15:57:34ZCDS support team

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

cds-question@unistra.frsupernovaeinfrared-photometryvisible-astronomybroad-band-photometrysloan-photometryWe present new photometric and spectroscopic observations of an unusual luminous blue variable (LBV) in NGC 3432, covering three major outbursts in 2008 October, 2009 April and 2009 November. Previously, this star experienced an outburst also in 2000 (known as SN 2000ch). During outbursts the star reached an absolute magnitude between -12.1 and -12.8. Its spectrum showed H, HeI and FeII lines with P-Cygni profiles during and soon after the eruptive phases, while only intermediate-width lines in pure emission (including HeII {lambda}4686) were visible during quiescence. The fast-evolving light curve soon after the outbursts, the quasi-modulated light curve, the peak magnitude and the overall spectral properties are consistent with multiple episodes of variability of an extremely active LBV. However, the widths of the spectral lines indicate unusually high wind velocities (1500-2800km/s), similar to those observed in Wolf-Rayet stars. Although modulated light curves are typical of LBVs during the S-Dor variability phase, the luminous maxima and the high frequency of outbursts are unexpected in S-Dor variables.2010MNRAS.408..181Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/408/181CatalogResearchIsServedByTAP VizieR generic servicerelated-toB/sn : Asiago Supernova Catalogue (Barbon et al., 1999-)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/408/181https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/408/181http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/408/181https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/408/181https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/408/181http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/408/181GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tap1.9821045660507152e-19 6.118840631666147e-19OpticalInfrareddefaultJ/MNRAS/408/181/table1Unpublished Johnson-Bessell photometry of the variable star in NGC 3432recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDateDate of observationstime.epochnullablen_Date[m] m indicates first maxima (1)meta.notecharJDAverage Julian Date of observationtime.epochdoublen_JD[m] m indicates first maxima (1)meta.notecharl_UmagLimit flag on Umagmeta.code.errorcharUmag? Johnson U band magnitudemagphot.mag;em.opt.Ufloatnullablee_Umag? rms uncertainty on Umagmagstat.error;phot.mag;em.opt.Ufloatnullablel_BmagLimit flag on Bmagmeta.code.errorcharBmag? Johnson B band magnitudemagphot.mag;em.opt.Bfloatnullablee_Bmag? rms uncertainty on Bmagmagstat.error;phot.mag;em.opt.Bfloatnullablen_Bmag[*] Note on error (2)meta.notecharl_VmagLimit flag on Vmagmeta.code.errorchare_Vmag? rms uncertainty on Vmagmagstat.error;phot.mag;em.opt.Vfloatnullablen_Vmag[*] Note on error (2)meta.notecharl_RmagLimit flag on Rmagmeta.code.errorcharRmag? Johnson R band magnitudemagphot.mag;em.opt.Rfloatnullablee_Rmag? rms uncertainty on Rmagmagstat.error;phot.mag;em.opt.Rfloatnullablen_Rmag[*] Note on error (2)meta.notecharl_ImagLimit flag on Imagmeta.code.errorcharImag? Johnson I band magnitudemagphot.mag;em.opt.Ifloatnullablee_Imag? rms uncertainty on Imagmagstat.error;phot.mag;em.opt.IfloatnullableTelTelescope (3)meta.id;instr.telcharNoteSource of the data (4)meta.notecharFlag[*] Rescaled to R-band (5)meta.code.errorcharVmag? Johnson V band magnitudemagphot.mag;em.opt.VfloatnullableJ/MNRAS/408/181/table2Sloan-filter photometry of the variable star in NGC 3432 and associated errorsgmag? Sloan g band magnitudemagphot.mag;em.opt.BfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDateDate of observationstime.epochnullableJDAverage Julian Date of observationtime.epochdoublel_umagLimit flag on umagmeta.code.errorcharumag? Sloan u band magnitudemagphot.mag;em.opt.Ufloatnullablee_umag? rms uncertainty on umagmagstat.error;phot.mag;em.opt.Ufloatnullablee_gmag? rms uncertainty on gmagmagstat.error;phot.mag;em.opt.Bfloatnullablel_rmagLimit flag on rmagmeta.code.errorcharrmag? Sloan r band magnitudemagphot.mag;em.opt.Rfloatnullablee_rmag? rms uncertainty on rmagmagstat.error;phot.mag;em.opt.Rfloatnullablel_imagLimit flag on imagmeta.code.errorcharimag? Sloan i band magnitudemagphot.mag;em.opt.Ifloatnullablee_imag? rms uncertainty on imagmagstat.error;phot.mag;em.opt.Ifloatnullablel_zmagLimit flag on zmagmeta.code.errorcharzmag? Sloan z band magnitudemagphot.mag;em.opt.Ifloatnullablee_zmag? rms uncertainty on zmagmagstat.error;phot.mag;em.opt.IfloatnullableTelTelescope (1)meta.id;instr.telchar