J/A+A/627/A135ivo://CDS.VizieR/J/A+A/627/A135doi:10.26093/cds/vizier.36270135CDSBhardwaj A.Panwar N.Herczeg G.H.Chen W.P.Singh H.P.2021-05-31T10:35:30Z2019-07-12T09:38:51ZCDS support team

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

cds-question@unistra.frstar-forming-regionsvariable-starsinfrared-photometryvisible-astronomyphotometryWe observed a field of 16'x16' in the star-forming region Pelican Nebula (IC 5070) at BVRI wavelengths for 90 nights spread over one year in 2012-2013. More than 250 epochs in VRI-bands are used to identify and classify variables up to V~21mag. We present a catalogue of optical time-series photometry with periods, mean-magnitudes and classifications for 95 variable stars including 67 pre-main-sequence variables towards star-forming region IC 5070. The pre-main-sequence variables are further classified as candidate classical T Tauri and weak-line T Tauri stars based on their light curve variations and the locations on the color-color and color-magnitude diagrams using optical and infrared data together with Gaia DR2 astrometry. Classical T Tauri stars display variability amplitudes up to three times the maximum fluctuation in disk-free weak-line T Tauri stars, which show strong periodic variations. Short-term variability is missed in our photometry within single nights. Several classical T Tauri stars display long-lasting (>10 days) single or multiple fading and brightening events up to a couple of magnitudes at optical wavelengths.2019A&A...627A.135Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/627/A135CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/other/BAJ/24.62 : BVRI Photometry of 14 PMS stars (Ibryamov+, 2016)J/other/RAA/18.137 : Long-term BVRI photometry of 15 PMS starsJ/A+A/602/A115 : X-ray survey of NGC7000/IC5070 (Damiani+, 2017)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/627/A135https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/627/A135http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/627/A135https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/627/A135https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/627/A135http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/627/A135GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/627/A135/table2 (Properties of variable sources)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/627/A135/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/627/A135/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/627/A135/table2?GETtext/xml+votable180.050000true312.7790844.398960.0055555555555555566/14687 15370https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/627/A135?format=asciiOpticalInfrareddefaultJ/A+A/627/A135/table2Properties of variable sourcesIDStar ID (VNNN)meta.id;meta.mainchare_Rmag? Uncertainty in R-band magnitudemagstat.error;phot.magfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainPer? Perioddtime.periodfloatnullableBmag? B-band magnitudemagphot.mag;em.opt.BfloatnullableVmag? V-band magnitudemagphot.mag;em.opt.VfloatnullableRmag? R-band magnitudemagphot.mag;em.opt.RfloatnullableImag? I-band magnitudemagphot.mag;em.opt.Ifloatnullablee_Bmag? Uncertainty in B-band magnitudemagstat.error;phot.magfloatnullablee_Vmag? Uncertainty in V-band magnitudemagstat.error;phot.magfloatnullablee_Imag? Uncertainty in I-band magnitudemagstat.error;phot.magfloatnullableAmpV? V-band amplitudemagphot.magfloatnullableAmpR? R-band amplitudemagphot.mag;em.opt.RfloatnullableAmpI? I-band amplitudemagphot.mag;em.opt.IfloatnullablelcShow the light curvesmeta.ref.urlcharLC[Y] Y indicates light curve data in table2.datmeta.codecharSimbadSimbad column added by the CDSmeta.ref.urlcharJ/A+A/627/A135/table1Time-series photometry for 75 variable sourcesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDStar IDmeta.id;meta.maincharBand[VRI] Observed bandinstr.bandpasscharMJDModified Julian date (JD-2400000)dtime.epochdoubleindexedmagband magnitudemagphot.magfloate_magUncertainties in band magnitudemagstat.error;phot.magfloat