J/A+A/568/A49ivo://CDS.VizieR/J/A+A/568/A49doi:10.26093/cds/vizier.35680049CDSPoljancic Beljan I.Jurdana-Sepic R.Semkov E.H.Ibryamov S.,Peneva S.P.Tsvetkov M.K.2018-01-04T08:22:58Z2014-08-12T07:53:34ZCDS 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-photometryTo broaden the search and study stars in the early evolutionary phase, we investigated a sample of 17 pre-main sequence objects previously detected as either H{alpha} emission-line pre-main sequence stars or T Tauri variables located in the field of the North America/Pelican Nebula complex. Johnson-Cousins B, V, Rc, Ic magnitudes and mean color indices for the program stars are determined from more than 12400 measurements from archive photographic plates and from CCD data collected at 7 observatories covering the period of almost 60 years from 1954 up to 2013. We complemented previously rare insights on the photometry of the program stars and presented their photometric history, which for almost all program stars is the first long term photometric monitoring on a timescale of 6 decades. Eight program stars are found to be classical T Tauri stars of variability type II, while 6 program stars are weak-line T Tauri stars of variability type I. For the first time, periodicity is found for three stars: V1716 Cyg indicates a 4.15 day period, V2051 Cyg indicates a 384 day period, and V521 Cyg a period of 503 days.2014A&A...568A..49Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/568/A49CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/vsx : AAVSO International Variable Star Index VSX (Watson+, 2006-2014)B/gcvs : General Catalogue of Variable Stars (Samus+ 2007-2013)III/205 : H-alpha Stars in Northern Milky Way (Kohoutek+ 1997)V/73 : Emission-Line Stars of the Orion Population (Herbig+ 1988)J/A+A/542/A43 : V2493 Cyg BVRI long term photometry (Semkov+, 2012)J/ApJS/193/25 : The NAN complex. II. MIPS observations (Rebull+, 2011)J/ApJ/697/787 : The NAN complex. I. IRAC observations (Guieu+, 2009)J/MNRAS/384/1277 : H{alpha} emission line sources from IPHAS (Witham+, 2008)J/A+A/479/827 : UBVR light curves of weak-line T Tauri stars (Grankin+, 2008)J/A+A/461/183 : Variability of classical T Tauri (Grankin+, 2007)J/BaltA/15/483 : Vilnius photometry in LDN 935 (Laugalys+, 2006)J/A+A/438/769 : PMS stars Proper Motion Catalog (Ducourant+, 2005)J/A+AS/104/557 : uvby-beta phot. in star-forming regions (Terranegra+ 1994)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/568/A49https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/568/A49http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/568/A49https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/568/A49https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/568/A49http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/568/A49GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/568/A49/table6 (Mean photometrical magnitudes and corresponding standard deviations for program stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/568/A49/table6?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/568/A49/table6?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/568/A49/table6?GETtext/xml+votable180.050000true314.512543.8450.0055555555555555566/15362-153632.367228618189496e-19 4.920466254354166e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/568/A49?format=asciiOpticalInfrareddefaultJ/A+A/568/A49/table6Mean photometrical magnitudes and corresponding standard deviations for program starsNameStar namemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint<Bmag>? Mean Johnson B-band magnitudemagphot.mag;em.opt.Bfloatnullablee_<Bmag>? <Bmag> uncertaintymagstat.error;phot.mag;em.opt.Bfloatnullable<Vmag>? Mean Johnson V-band magnitudemagphot.mag;em.opt.Vfloatnullablee_<Vmag>? <Vmag> uncertaintymagstat.error;phot.mag;em.opt.Vfloatnullable<Rmag>Mean Cousins R-band magnitudemagphot.mag;em.opt.Rfloate_<Rmag><Rmag> uncertaintymagstat.error;phot.mag;em.opt.Rfloat<Imag>Mean Cousins I-band magnitudemagphot.mag;em.opt.Ifloate_<Imag><Imag> uncertaintymagstat.error;phot.mag;em.opt.IfloatPer? Period (column added by CDS)dtime.periodfloatnullablelc4Show the light curvemeta.ref.urlcharT4Name of the file with photometry in subdirectory table4meta.id;meta.filecharlc5Show the light curvemeta.ref.urlcharT5Name of the file with CCD photometry in subdirectory table5meta.id;meta.filecharSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPositions from SIMBAD database (right ascension part)degpos.eq.ra;meta.main_DEPositions from SIMBAD database (declination part)degpos.eq.dec;meta.main