J/PAZh/37/691ivo://CDS.VizieR/J/PAZh/37/691CDSArkhipova V.P.Ikonnikova N.P.Komissarova G.V.2017-06-27T06:38:07Z2011-11-10T14:41:52ZCDS support team

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

cds-question@unistra.frvariable-starssupergiant-starsvisible-astronomyWide-band photometryWe analyze long-term UBV observations and ASAS-3 photometry for five candidates for protoplanetary nebulae - F and G supergiants with infrared excesses at high Galactic latitudes - V340 Ser, IRAS 05113+1347, V552 Pup, V448 Lac, and RV Col. These stars exhibit quasi-periodic multifrequency light variations caused by pulsations with characteristic time scales from 83 to 139 days, depending on the stellar temperature. Cooler stars undergo variations with larger amplitudes and periods. The variations at close frequencies with a period ratio of 1.03-1.09 are responsible for the amplitude modulation revealed for most program stars.2011PAZh...37..691Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/PAZh/37/691CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/PAZh/37/691https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/PAZh/37/691http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/PAZh/37/691https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/PAZh/37/691https://vizier.iucaa.in/viz-bin/votable?-source=J/PAZh/37/691http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/PAZh/37/691GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tap3.322582951404819e-19 3.852589004194616e-19OpticaldefaultJ/PAZh/37/691/table3UBV observations of V340 Ser in 2003-2010recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian datedtime.epochintVmagJohnson V magnitudemagphot.mag;em.opt.VfloatB-VJohnson B-V colour indexmagphot.color;em.opt.B;em.opt.VfloatU-BJohnson U-B colour indexmagphot.color;em.opt.U;em.opt.BfloatJ/PAZh/37/691/table4UBV observations of V448 Lac in 2003-2010recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian datedtime.epochintVmagJohnson V magnitudemagphot.mag;em.opt.VfloatB-VJohnson B-V colour indexmagphot.color;em.opt.B;em.opt.VfloatU-BJohnson U-B colour indexmagphot.color;em.opt.U;em.opt.Bfloat