J/ApJ/702/1507ivo://CDS.VizieR/J/ApJ/702/1507doi:10.26093/cds/vizier.17021507CDSMorales-Calderon M.Stauffer J.R.Rebull L.Whitney B.A.,Barrado y Navascues D.Ardila D.R.Song I.Brooke T.Y.Hartmann L.,Calvet N.2017-09-22T16:16:42Z2011-11-15T15:30:44ZCDS support team

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

cds-question@unistra.frinfrared-photometryyoung-stellar-objectsmolecular-cloudsWe have used Spitzer/Infrared Array Camera (IRAC) to conduct a photometric monitoring program of the IC1396A dark globule in order to study the mid-IR (3.6-8um) variability of the heavily embedded young stellar objects (YSOs) present in that area. We obtained light curves covering a 14 day timespan with a twice daily cadence for 69 YSOs, and continuous light curves with approximately 12s cadence over 7hr for 38 YSOs. Typical accuracies for our relative photometry were 1%-2% for the long timespan data and a few millimagnitude, corresponding to less than 0.5%, for the 7hr continuous "staring-mode" data. More than half of the YSOs showed detectable variability, with amplitudes from ~0.05mag to ~0.2mag. One star, IC1396A-47, shows a 3.5hr periodic light curve; this object may be a PMS Delta Scuti star.2009ApJ...702.1507Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/702/1507CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)J/ApJ/698/324 : Spitzer IRDCs (Ragan+, 2009)J/ApJS/181/321 : Properties of Spitzer c2d dark clouds (Evans+, 2009)J/ApJ/638/897 : IR photometry in Trumpler 37 and NGC 7160 (Sicilia-Aguilar+,https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/702/1507https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/702/1507http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/702/1507https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/702/1507https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/702/1507http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/702/1507GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/702/1507/table6 (Photometry for the variable objects found in the field)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/702/1507/table6?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/702/1507/table6?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/702/1507/table6?GETtext/xml+votable180.050000true323.962833357.47011110.005555555555555556Cone search capability for table J/ApJ/702/1507/table1 (New candidates photometry from the co-added deep mosaics)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/702/1507/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/702/1507/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/702/1507/table1?GETtext/xml+votable180.050000true324.196583357.49794440.005555555555555556Cone search capability for table J/ApJ/702/1507/table2 (Long-term variability: main results from mapping data)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/702/1507/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/702/1507/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/702/1507/table2?GETtext/xml+votable180.050000true323.99137557.48608330.0055555555555555566/154788.27688880188539e-21 1.7003137259100215e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/702/1507?format=asciiInfrareddefaultJ/ApJ/702/1507/table3Time series in the four IRAC bands for the variable YSOs of our samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[1/74] Object ID (<[MSR2009] IC1396A-NN> in Simbad)meta.id;meta.mainintMJDModified Julian Datedtime.epochdouble[3.6]? Spitzer/IRAC 3.6 micron band magnitudemagphot.mag;em.IR.3-4umfloatnullablee_[3.6]? Uncertainty in 3.6magmagstat.errorfloatnullable[4.5]? Spitzer/IRAC 4.5 micron band magnitudemagphot.mag;em.IR.4-8umfloatnullablee_[4.5]? Uncertainty in 4.5magmagstat.errorfloatnullable[5.8]? Spitzer/IRAC 5.8 micron band magnitudemagphot.flux.density;em.IR.4-8umfloatnullablee_[5.8]? Uncertainty in 5.8magmagstat.errorfloatnullable[8.0]? Spitzer/IRAC 8.0 micron band magnitudemagphot.flux.density;em.IR.8-15umfloatnullablee_[8.0]? Uncertainty in 8.0magmagstat.errorfloatnullableJ/ApJ/702/1507/table6Photometry for the variable objects found in the fieldrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqObject internal identification (<[MSR2009] NNNN> in Simbad)meta.id;meta.mainintRAJ2000Hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of declination (J2000)pos.eq.dec;meta.mainJmag? 2MASS J-band magnitudemagphot.mag;em.IR.Jfloatnullablef_Jmag[c] c: upper limitmeta.codechare_Jmag? Jmag uncertaintymagstat.error;phot.mag;em.IR.JfloatnullableHmag? 2MASS H-band magnitudemagphot.mag;em.IR.Hfloatnullablee_Hmag? Hmag uncertaintymagstat.error;phot.mag;em.IR.HfloatnullableKsmag? 2MASS Ks-band magnitudemagphot.mag;em.IR.Kfloatnullablef_Ksmag[c] c: upper limitmeta.codechare_Ksmag? Ksmag uncertaintymagstat.error;phot.mag;em.IR.Kfloatnullable[3.6]Spitzer/IRAC 3.6um-band magnitudemagphot.mag;em.IR.3-4umfloate_[3.6]Spitzer/IRAC 3.6um-band magnitude uncertaintymagstat.errorfloat[4.5]Spitzer/IRAC 4.5um-band magnitudemagphot.mag;em.IR.4-8umfloate_[4.5]Spitzer/IRAC 4.5um-band magnitude uncertaintymagstat.errorfloat[5.8]? Spitzer/IRAC 5.8um-band magnitudemagphot.flux.density;em.IR.4-8umfloatnullablee_[5.8]? Spitzer/IRAC 5.8um-band magnitude uncertaintymagstat.errorfloatnullable[8.0]? Spitzer/IRAC 8.0um-band magnitudemagphot.flux.density;em.IR.8-15umfloatnullablee_[8.0]? Spitzer/IRAC 8.0um-band magnitude uncertaintymagstat.errorfloatnullable2MDisplay the 2MASS data (Cutri et al. 2003, Cat. II/246)meta.ref.urlcharSimbadSimbad column added by the CDScharJ/ApJ/702/1507/table1New candidates photometry from the co-added deep mosaicsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[60/74] YSO candidate name (<[MSR2009] IC1396A-NN> in Simbad) (1)meta.id;meta.mainintf_ID[d] source close to a brighter one (2)meta.codecharVSimbad column added by the CDSmeta.ref.urlcharLCPlot the light curve (if variable)meta.ref.urlcharRAJ2000Hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of declination (J2000)pos.eq.dec;meta.mainJmag? 2MASS J-band magnitudemagphot.mag;em.IR.Jfloatnullablel_Jmag[c] c: upper limitmeta.code.errorchare_Jmag? Jmag uncertaintymagstat.error;phot.mag;em.IR.JfloatnullableHmag? 2MASS H-band magnitudemagphot.mag;em.IR.Hfloatnullablel_Hmag[c] c: upper limitmeta.code.errorchare_Hmag? Hmag uncertaintymagstat.error;phot.mag;em.IR.HfloatnullableKsmag? 2MASS Ks-band magnitudemagphot.mag;em.IR.Kfloatnullablel_Ksmag[c] c: upper limitmeta.code.errorchare_Ksmag? Ksmag uncertaintymagstat.error;phot.mag;em.IR.Kfloatnullable[3.6]Spitzer/IRAC 3.6um-band magnitudemagphot.mag;em.IR.3-4umfloate_[3.6]3.6um-band magnitude uncertaintymagstat.errorfloat[4.5]Spitzer/IRAC 4.5um-band magnitudemagphot.mag;em.IR.4-8umfloate_[4.5]4.5um-band magnitude uncertaintymagstat.errorfloat[5.8]Spitzer/IRAC 5.8um-band magnitudemagphot.flux.density;em.IR.4-8umfloate_[5.8]5.8um-band magnitude uncertaintymagstat.errorfloat[8.0]? Spitzer/IRAC 8.0um-band magnitudemagphot.flux.density;em.IR.8-15umfloatnullablee_[8.0]? 8.0um-band magnitude uncertaintymagstat.errorfloatnullable[24]? Spitzer 24um-band magnitudemagphot.flux.density;em.IR.15-30umfloatnullablee_[24]? 24um-band magnitude uncertaintymagstat.errorfloatnullableClassCandidate class (I or II)src.classnullable2MDisplay the 2MASS data (Cutri et al. 2003, Cat. II/246)meta.ref.urlcharJ/ApJ/702/1507/table2Long-term variability: main results from mapping data[4.5]? Spitzer/IRAC 4.5um-band magnitudemagphot.mag;em.IR.4-8umfloatnullableT1? Variability timescale for the IRAC Ch. 1 (4)dsrc.varfloatnullablee_[4.5]? 4.5mag uncertaintymagstat.errorfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[1/74] YSO candidate identification (<[MSR2009] IC1396A-NN> in Simbad)(1)meta.id;meta.mainintprimaryf_ID[f] Uncertain member (2)meta.codecharVSimbad column added by the CDSmeta.code;src.varcharLCPlot the light curve (if variable)meta.ref.urlcharRAJ2000Hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of declination (J2000)pos.eq.dec;meta.mainSAYSO class as in Sicilia-Aguilar et al. (2006, Cat. J/ApJ/638/897)src.classcharR04ID and YSO Class as in Reach et al. (2004ApJS..154..385R)src.classClassYSO class in this paper (3)src.classnullablef_Class[e] e: classification in disagreement with Sicilia-Aguilar et al. (2006, Cat. J/ApJ/638/897)meta.codechar[3.6]Spitzer/IRAC 3.6um-band magnitudemagphot.mag;em.IR.3-4umfloate_[3.6]3.6mag uncertaintymagstat.errorfloatrms13.6um rms amplitudesrc.var.amplitudefloatV1[N/V] {chi}^2^ test variability resultmeta.code;src.varcharrms2? 4.5um rms amplitudesrc.var.amplitudefloatnullableV2[N/V] {chi}^2^ test variability resultmeta.code;src.varcharT2? Variability timescale for the IRAC Ch. 2 (4)dsrc.varfloatnullableJsStetson J statistic (Js>0.55 for a variable)stat.fit.paramdoubleVar[N/V] Final variability tagmeta.code;src.varcharSA06Display the data from Sicilia-Aguilar et al. 2006, Cat. J/ApJ/638/897meta.ref.urlcharSimbadSimbad column added by the CDSchar