J/A+A/566/A111ivo://CDS.VizieR/J/A+A/566/A111doi:10.26093/cds/vizier.35660111CDSWilson P.A.Rajan A.Patience J.2017-10-18T08:24:25Z2014-06-20T11:30:50ZCDS support team

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

cds-question@unistra.frdwarf-starsvariable-starsphotometryUsing the SofI instrument on the 3.5m New Technology Telescope, we have conducted an extensive near-infrared monitoring survey of an unbiased sample of 69 brown dwarfs spanning the L0 to T8 spectral range, with at least one example of each spectral type. Each target was observed for a 2-4 hour period in the Js-band, and the median photometric precision of the data is ~0.7%. A total of 14 brown dwarfs were identified as variables with min-to-max amplitudes ranging from 1.7% to 10.8% over the observed duration. All variables satisfy a statistical significance threshold with a p-value <=5% based on comparison with a median reference star light curve. Approximately half of the variables show pure sinusoidal amplitude variations similar to 2MASSJ2139+0220, and the remainder show multi-component variability in their light curves similar to SIMPJ0136+0933.2014A&A...566A.111Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/566/A111CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/566/A111https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/566/A111http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/566/A111https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/566/A111https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/566/A111http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/566/A111GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/566/A111/table3 (Variables identified in this study)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/566/A111/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/566/A111/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/566/A111/table3?GETtext/xml+votable180.050000true16.5952333-59.55515280.0055555555555555566/18281 19144 26248 27201 27362 27653 28006 33257 34406 34780 34839 35572 36602 38176 40882 46138 46334https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/566/A111?format=asciiOpticaldefaultJ/A+A/566/A111/table3Variables identified in this studyrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSNameShort namemeta.idcharprimaryq_Name[AB] Variability confidence (1)meta.code.qualcharNameStar full namemeta.id;meta.maincharSpTypeMK spectral typesrc.spTypecharDur[1.9/3.4] Observation durationhtime.duration;obsfloatNref[3/8] Number of reference stars usedmeta.idintdof[4/12] Number of degrees of freedommeta.numberintchi2[1.8/19] Reduced {chi}^2^ valuestat.valuefloateta[1/4] Reduced robust median statistic {eta} (1)stat.fit.paramfloatQ[0.3/1.6] Photometric uncertainty%stat.errorfloatp[0/10] p-value (1)%stat.fit.goodnessfloatAmp[1/11] Amplitude of variation (2)%src.var.amplitudefloate_Amp[0.5/2] rms uncertainty on Amp%stat.errorfloatLCPlot of the light curvemeta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainJ/A+A/566/A111/lcsVariable objects light curvesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSNameShort name of object, as in table3meta.id;meta.maincharTime[0/0.14] Days since first Data pointdtime.epochdoubleTarget[0.95/1.07] Target fluxphot.flux;arith.ratiofloate_Target[0.002/0.012] Target flux uncertaintystat.errorfloatMaster[0.96/1.05] Master reference fluxphot.flux;arith.ratiofloate_Master[0.0008/0.012] Master reference flux uncertaintystat.errorfloat