J/A+A/458/225ivo://CDS.VizieR/J/A+A/458/225doi:10.26093/cds/vizier.34580225CDSViotti R.F.Rossi C.Polcaro V.F.Montagni F.Gualandi R.Norci L.2017-06-21T08:22:06Z2006-12-16T17:13:52ZCDS support team

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

cds-question@unistra.frstandard-starsinfrared-photometryvisible-astronomybroad-band-photometryUnderstanding the origin of the instabilities of LBVs is important for shedding light on the late evolutionary stages of massive stars and on the chemical evolution of galaxies. To investigate the physical nature of variable stars in the upper H-R diagram, we performed a spectrophotometric study of the Romano's star GR 290 and the Hubble-Sandage variables A, B, and C in the close galaxy M 33. New spectroscopic and photometric data were employed in conjunction with already published data of these stars in order to derive spectral types, energy distribution and bolometric luminosities.2006A&A...458..225Vhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/458/225CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/110/2715 : UBV photometry in NGC 6822, M31 and M33 (Massey+ 1995)J/ApJ/501/153 : VRB photometry of red supergiants (Massey 1998)J/ApJS/89/85 : Blue and red supergiants in M33 (Ivanov+ 1993)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/458/225https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/458/225http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/458/225https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/458/225https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/458/225http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/458/225GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/458/225/table2 (Stars used as photometric standard stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/458/225/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/458/225/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/458/225/table2?GETtext/xml+votable180.050000true23.744291730.7310.0055555555555555566/2155https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/458/225?format=asciiOpticalInfrareddefaultJ/A+A/458/225/table2Stars used as photometric standard starsVmagV magnitude (2)magphot.mag;em.opt.VfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar's name (1)meta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainUmag? U magnitude (no error reported) (2)magphot.mag;em.opt.UfloatnullableBmagB magnitude (2)magphot.mag;em.opt.Bfloate_Bmag? Error on B magnitudemagstat.error;phot.mag;em.opt.Bfloatnullablee_Vmag? Error on V magnitudemagstat.error;phot.mag;em.opt.VfloatnullableRmag? R magnitude (2)magphot.mag;em.opt.Rfloatnullablee_Rmag? Error on R magnitudemagstat.error;phot.mag;em.opt.RfloatnullableImag? I magnitude (2)magphot.mag;em.opt.Ifloatnullablee_Imag? Error on I magnitudemagstat.error;phot.mag;em.opt.IfloatnullableNotes[1-4]? Notes (3)meta.noteintnullable