J/other/PASA/32.ivo://CDS.VizieR/J/other/PASA/32.11doi:10.26093/cds/vizier/ds/dckbbCDSSemkov E.Ibryamov S.Peneva S.Milanov T.Stoyanov K.Stateva I.,Kjurkchieva D.Dimitrov D.Radeva V.2026-03-17T20:08:23Z2015-04-01T16:16:57ZCDS support team

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

cds-question@unistra.frvariable-starspre-main-sequence-starsinfrared-photometryvisible-astronomybroad-band-photometryResults from UBVRI photometric observations of the pre-main sequence star GM Cephei obtained in the period April 2011 - August 2014 are reported in the paper. Presented data are a continuation of our photometric monitoring of the star started in 2008. GM Cep is located in the field of the young open cluster Trumpler 37 and over the past years it has been an object of intense photometric and spectral studies. The star shows a strong photometric variability interpreted as a possible outburst from EXor type in previous studies. Our photometric data for a period of over six years show a large amplitude variability ({Delta}V~2.3mag) and several deep minimums in brightness are observed. The analysis of the collected multicolor photometric data show the typical of UX Ori variables a colour reversal during the minimums in brightness. The observed decreases in brightness have a different shape, and evidences of periodicity are not detected. At the same time, high amplitude rapid variations in brightness typical for the classical T Tauri stars also present on the light curve of GM Cep. The spectrum of GM Cep shows the typical of classical T Tauri stars wide H alpha emission line and absorption lines of some metals. We calculate the outer radius of the H{alpha} emitting region as 10.4+/-0.5R_{sun}_ and the accretion rate as 1.8x10^-7^M_{sun}_/yr.2015PASA...32...11Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/other/PASA/32.11CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/other/RAA/14.1264 : V350 Cep UBVRI long-term photometry (Ibryamov+, 2014)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/other/PASA/32.11https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/other/PASA/32.11http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/other/PASA/32.11https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/other/PASA/32.11https://vizier.iucaa.in/viz-bin/votable?-source=J/other/PASA/32.11http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/other/PASA/32.11GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tap2.367228618189496e-19 6.118840631666147e-19OpticalInfrareddefaultJ/other/PASA/32.11/tablePhotometric CCD observations of GM Cep during the period June/2008-August/2014recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDateDate of observation ("DD.MM.YYYY" format)time.epochnullableJDJulian Datedtime.epochdoubleImag? Cousins I magnitudemagphot.mag;em.opt.IfloatnullableRmag? Cousins R magnitudemagphot.mag;em.opt.RfloatnullableVmag? Johnson V magnitudemagphot.mag;em.opt.VfloatnullableBmag? Johnson B magnitudemagphot.mag;em.opt.BfloatnullableUmag? Johnson U magnitudemagphot.mag;em.opt.UfloatnullableTelTelescope used (1)instr.setupcharCCDCCD used (2)meta.id;instrcharObsName of observatorymeta.id;instr.obstychar