J/A+A/553/A40ivo://CDS.VizieR/J/A+A/553/A40doi:10.26093/cds/vizier.35530040CDSHackman T.Pelt J.Mantere M.J.Jetsu L.Korhonen H.Granzer T.,Kajatkari P.Lehtinen J.Strassmeier K.G.2017-07-06T06:25:37Z2013-04-29T08:28:08ZCDS support team

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

cds-question@unistra.frvariable-starsvisible-astronomybroad-band-photometryWe apply the continuous period search and carrier fit methods on long-term standard Johnson-Cousins V-observations from the years 1995-2010. The observations were carried out with two automated photometric telescopes, Phoenix-10 and Amadeus T7 located in Arizona. We identify complex phase behaviour in 6 of the 15 analysed data segments. We identify five flip-flop events and two cases of phase jumps, where the phase shift is {Delta}{phi}<0.4. In addition we see two mergers of spot regions and two cases where the apparent phase shifts are caused by spot regions drifting with respect to each other. Furthermore we detect variations in the rotation period corresponding to a differential rotation coefficient of |k|>0.031.2013A&A...553A..40Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/553/A40CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/278/449 : Long-term photometry of FK Com (Jetsu+ 1993)J/A+AS/103/183 : UVBRI photometry of FK Com (Jetsu+ 1994)J/A+A/374/1049 : Photometry of FK Com for 1993-2001 (Korhonen+, 2001)J/A+A/390/179 : Study of FK Comae Berenices. IV. (Korhonen+ 2002)J/A+A/467/229 : UBV photometry of FK Com and HD 199178 (Panov+, 2007)J/A+A/476/881 : Differential photometry of FK Com (Korhonen+, 2007)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/553/A40https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/553/A40http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/553/A40https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/553/A40https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/553/A40http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/553/A40GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tap2.367228618189496e-19 6.118840631666147e-19OpticaldefaultJ/A+A/553/A40/vimagV and I photometryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJD[2450850/2455298] Heliocentric Julian datedtime.epochdoubleVmag? Johnson V magnitudemagphot.mag;em.opt.VfloatnullableImag? Cousins I magnitudemagphot.mag;em.opt.IfloatnullableJ/A+A/553/A40/ubvmagU, B and V photometryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJD[2449876/2453195] Heliocentric Julian datedtime.epochdoubleUmag? Johnson U magnitudemagphot.mag;em.opt.UfloatnullableBmag? Johnson B magnitudemagphot.mag;em.opt.BfloatnullableVmag? Johnson V magnitudemagphot.mag;em.opt.Vfloatnullable