J/MNRAS/379/1665ivo://CDS.VizieR/J/MNRAS/379/1665doi:10.26093/cds/vizier.73791665CDSLee J.W.Kim C.-H.Koch R.H.2024-07-04T20:18:36Z2008-02-22T22:06:30ZCDS support team

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

cds-question@unistra.freclipsing-binary-starsinfrared-photometryvisible-astronomybroad-band-photometryWe obtained CCD photometric observations of the Algol-type semidetached binary XX Cephei (XX Cep) during 15 nights from 2002 September 17 to 2003 February 2, and also on 2005 January 21. Except for those data taken on the last night of the concentrated observing season, the 3881 measurements were obtained over an interval of only 106 nights. From these data, four new times of minimum light were calculated. The (O-C) diagram formed from all available timings, and thus the orbital period of the system, can be partly represented as a beat effect between two cyclical variations with different periods (P1'=42yr, P2'=181yr) and amplitudes (K1=0.015d, K2=0.103d), respectively. Both physical and non-physical interpretations of these cycles were investigated.2007MNRAS.379.1665Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/379/1665CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/379/1665https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/379/1665http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/379/1665https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/379/1665https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/379/1665http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/379/1665GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticalInfrareddefaultJ/MNRAS/379/1665/table2CCD photometric observations of XX CeprecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDBHeliocentric Julian date of observation in B banddtime.epochdoubleDBmagDifferential B magnitudemagphot.mag;arith.difffloatHJDVHeliocentric Julian date of observation in V banddtime.epochdoubleDVmagDifferential V magnitudemagphot.mag;arith.difffloatHJDRHeliocentric Julian date of observation in R banddtime.epochdoubleDRmagDifferential R magnitudemagphot.mag;arith.difffloatHJDIHeliocentric Julian date of observation in I banddtime.epochdoubleDImagDifferential I magnitudemagphot.mag;arith.difffloat