J/A+AS/130/245ivo://CDS.VizieR/J/A+AS/130/245CDSVaz L.P.R.Andersen J.Casey B.W.Clausen J.V.Mathieu R.D.Heyer I.1998-06-16T22:03:33Z1998-06-16T22:03:00ZCDS support team

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

cds-question@unistra.freclipsing-binary-starsvisible-astronomymedium-band-photometryComplete uvby light curves of the detached Herbig Be eclipsing binary TY Coronae Australis are presented. A total of 1787 photometric measurements in each of the four colours were obtained in 1989 and in 1992-1994. A detailed analysis of the y light curve obtained in 1992-1993 is published separately (Casey et al. 1997). The reflection nebula around the system contributes about 30% of the light in all four passbands. Here we present and discuss the non-eclipse-related photometric variability of the system. We suggest that these variations are the result of variable obscuration, possibly linked to dust shells physically associated to the system.1998A&AS..130..245Vhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+AS/130/245CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+AS/130/245https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+AS/130/245http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+AS/130/245https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+AS/130/245https://vizier.iucaa.in/viz-bin/votable?-source=J/A+AS/130/245http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+AS/130/245GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+AS/130/245/table2Magnitude differences TY CrA - HD 176423 in 1989, 1992, 1993 and 1994 (instrumental system)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintYearYear of observationsyrtime.epochintHJDHeliocentric Julian Daydtime.epochdoubleDymagy magnitude differencemagphot.mag;arith.difffloatDb-yb-y colour index differencemagphot.color;arith.difffloatDm1m1 Stroemgren index differencemagphot.color;arith.difffloatDc1c1 Stroemgren index differencemagphot.color;arith.difffloatDbmagb magnitude differencemagphot.mag;arith.difffloatDvmagv magnitude differencemagphot.mag;arith.difffloatDumagu magnitude differencemagphot.mag;arith.difffloat