J/AJ/150/175ivo://CDS.VizieR/J/AJ/150/175doi:10.26093/cds/vizier.51500175CDSRebull L.M.Stauffer J.R.Cody A.M.Gunther H.M.Hillenbrand L.A.,Poppenhaeger K.Wolk S.J.Hora J.Hernandez J.Bayo A.Covey K.,Forbrich J.Gutermuth R.Morales-Calderon M.Plavchan P.Song I.,Bouy H.Terebey S.Cuillandre J.C.Allen L.E.2017-07-10T06:38:32Z2016-07-06T12:25:30ZCDS support team

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

cds-question@unistra.fryoung-stellar-objectsvariable-starsinfrared-photometryAs part of the Young Stellar Object VARiability (YSOVAR) program, we monitored NGC 1333 for ~35 days at 3.6 and 4.5{mu}m using the Spitzer Space Telescope. We report here on the mid-infrared variability of the point sources in the ~10'x~20' area centered on 03:29:06, +31:19:30 (J2000). Out of 701 light curves in either channel, we find 78 variables over the YSOVAR campaign. About half of the members are variable. The variable fraction for the most embedded spectral energy distributions (SEDs) (Class I, flat) is higher than that for less embedded SEDs (Class II), which is in turn higher than the star-like SEDs (Class III). A few objects have amplitudes (10-90th percentile brightness) in [3.6] or [4.5]>0.2mag; a more typical amplitude is 0.1-0.15mag. The largest color change is >0.2mag. There are 24 periodic objects, with 40% of them being flat SED class. This may mean that the periodic signal is primarily from the disk, not the photosphere, in those cases. We find 9 variables likely to be "dippers", where texture in the disk occults the central star, and 11 likely to be "bursters", where accretion instabilities create brightness bursts. There are 39 objects that have significant trends in [3.6]-[4.5] color over the campaign, about evenly divided between redder-when-fainter (consistent with extinction variations) and bluer-when-fainter. About a third of the 17 Class 0 and/or jet-driving sources from the literature are variable over the YSOVAR campaign, and a larger fraction (~half) are variable between the YSOVAR campaign and the cryogenic-era Spitzer observations (6-7 years), perhaps because it takes time for the envelope to respond to changes in the central source. The NGC 1333 brown dwarfs do not stand out from the stellar light curves in any way except there is a much larger fraction of periodic objects (~60% of variable brown dwarfs are periodic, compared to ~30% of the variables overall).2015AJ....150..175Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/150/175CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/799/136 : IN-SYNC. II. Candidate young stars in NGC 1333 (Foster+, 2015)J/AJ/150/118 : YSOVAR infrared photometry in IRAS 20050+2720J/AJ/150/17 : A catalog of point sources toward NGC 1333 (Rebull, 2015)J/AJ/148/122 : YSOVAR: infrared photometry in Lynds 1688 (Gunther+, 2014)J/AJ/147/82 : Monitoring of disk-bearing stars in NGC 2264 (Cody+, 2014)J/ApJ/774/22 : CO observations of YSOs in NGC 1333 (Plunkett+, 2013)J/ApJ/744/6 : SONYC census of very low-mass objects in NGC1333J/AJ/140/266 : NGC 1333 X-ray luminous YSOs properties (Winston+, 2010)J/ApJS/184/18 : Spitzer survey of young stellar clusters (Gutermuth+, 2009)J/ApJ/674/336 : Spitzer observations of NGC 1333 (Gutermuth+, 2008)J/AJ/127/1131 : NGC 1333 low-mass stars infrared photometry (Wilking+, 2004)J/ApJ/575/354 : Young stellar objects in the NGC 1333 (Getman+, 2002)J/A+AS/106/165 : Near-IR imaging photometry of NGC 1333 (Aspin+ 1994)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/150/175https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/150/175http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/150/175https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/150/175https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/150/175http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/150/175GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/150/175/table1 (Contents of single-value object catalog)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/150/175/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/150/175/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/150/175/table1?GETtext/xml+votable180.050000true52.1311688931.458971110.0055555555555555566/859 8622.4016587514425055e-21 5.950631229554308e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/150/175?format=asciiInfrareddefaultJ/AJ/150/175/table6Class 0 and jet driversNoteNotesmeta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSSTYSVDesignation within the Spitzer Space Telescope (SST) Young Stellar Object VARiability (YSOVAR) program (HHMMSS.ss+DDMMSS.s; J2000) (cat)meta.id;meta.maincharClass0Identified as Class O? (yes or no)meta.codecharJetJet driver? (yes or no)meta.codecharClOur class (I or II)meta.code.classnullableCYIs this Cryo-to-YSOVAR (CY) variable? (yes or no)meta.codecharVarVariable in either channel over the YSOVAR campaign? (yes or no)meta.codechar[3.6][9.8/17.5]? Spitzer/IRAC 3.6{mu}m band magnitude from the cryogenic eramagphot.mag;em.IR.3-4umfloatnullable[4.5][7.8/15.8] Spitzer/IRAC 4.5{mu}m band magnitude from the cryogenic eramagphot.mag;em.IR.4-8umfloatSimbadSimbad column added by the CDSmeta.ref.urlcharJ/AJ/150/175/table7Famous Young Stellar Objects (YSOs)FigFigure numbermeta.idcharNoteNotesmeta.notecharSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintVarIndicates a variable over the YSOVAR campaign ("Detected"), or an object not detected as variable over the YSOVAR campaignmeta.codecharSSTYSVDesignation within the Spitzer Space Telescope (SST) Young Stellar Object VARiability (YSOVAR) program (HHMMSS.ss+DDMMSS.s; J2000)meta.id;meta.maincharONameOther(s) name(s)meta.idcharJ/AJ/150/175/table1Contents of single-value object catalogl_Jmag[>] Lower limit flag on Jmag (l_J)meta.code.errorcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSSTYSVDesignation within the Spitzer Space Telescope (SST) Young Stellar Object VARiability (YSOVAR) program (HHMMSS.ss+DDMMSS.s; J2000) (cat)meta.id;meta.maincharprimaryFSimbad column added by the CDSmeta.numberintnullableC0Simbad column added by the CDSmeta.ref.urlcharLSimbad column added by the CDSmeta.ref.urlcharRAJ2000Right Ascension in decimal degrees (J2000) (RA)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000) (Dec)degpos.eq.dec;meta.mainumag[11.8/23.6]? CFHT/Megacam u-band AB magnitude (CFHT=Canada-France-Hawaii Telescope) (cfht_umag)magphot.mag;em.opt.Ufloatnullablee_umag[0.01/0.13]? Error in umag (e_cfht_umag)magstat.error;phot.mag;em.opt.Ufloatnullablegmag[10.78/24.13]? CFHT/Megacam g-band AB magnitude (cfht_gmag)magphot.mag;em.opt.Bfloatnullablee_gmag[0.01/0.16]? Error in gmag (e_cfht_gmag)magstat.error;phot.mag;em.opt.Bfloatnullablermag[10.66/24.1]? CFHT/Megacam r-band AB magnitude (cfht_rmag)magphot.mag;em.opt.Rfloatnullablee_rmag[0.01/0.17]? Error in rmag (e_cfht_rmag)magstat.error;phot.mag;em.opt.Rfloatnullableimag[14.42/25.65]? CFHT/Megacam i-band AB magnitude (cfht_imag)magphot.mag;em.opt.Ifloatnullablee_imag[0.01/0.22]? Error in imag (e_cfht_imag)magstat.error;phot.mag;em.opt.Ifloatnullablei'mag[14.26/25.6]? Subaru/Suprime i'-band AB magnitude (subaru_imag)magphot.mag;em.opt.Ifloatnullablee_i'mag[0.01/0.11]? Error in i'mag (e_subaru_imag)magstat.error;phot.mag;em.opt.Ifloatnullablez'mag[13.89/25.57]? Subaru/Suprime z'-band AB magnitude (subaru_zmag)magphot.mag;em.opt.Ifloatnullablee_z'mag[0.02/0.17]? Error on z'mag (e_subaru_zmag)magstat.error;phot.mag;em.opt.IfloatnullableJmag[8.1/21]? J band magnitude (J) (1)magphot.mag;em.IR.Jfloatnullablee_Jmag[0.01/0.91]? Uncertainty in Jmag (e_J)magstat.error;phot.mag;em.IR.Jfloatnullablel_Hmag[>] lower limit flag on Hmag (l_H)meta.code.errorcharHmag[7.8/20.1]? H band magnitude (H) (1)magphot.mag;em.IR.Hfloatnullablee_Hmag[0.01/0.6]? Uncertainty in Hmag (e_H)magstat.error;phot.mag;em.IR.Hfloatnullablel_Ksmag[>] Lower limit flag on Ksmag (l_Ks)meta.code.errorcharKsmag[7.17/18.62]? Ks band magnitude (Ks) (1)magphot.mag;em.IR.Kfloatnullablee_Ksmag[0.01/0.6]? Uncertainty in Ksmag (e_Ks)magstat.error;phot.mag;em.IR.Kfloatnullablel_[3.6][>] Lower limit flag on [3.6]meta.code.errorchar[3.6][6.7/18.81]? Spitzer/IRAC 3.6{mu}m band magnitude (1)magphot.mag;em.IR.3-4umfloatnullablee_[3.6][0.01/0.36]? Uncertainty in [3.6]magstat.errorfloatnullablel_[4.5][>] Lower limit flag on [4.5]meta.code.errorchar[4.5][5.54/17.35]? Spitzer/IRAC 4.5{mu}m band magnitude (1)magphot.mag;em.IR.4-8umfloatnullablee_[4.5][0.01/0.6]? Uncertainty in [4.5]magstat.errorfloatnullablel_[5.8][>] Lower limit flag on [5.8]meta.code.errorchar[5.8][4.58/19.31]? Spitzer/IRAC 5.8{mu}m band magnitude (1)magphot.flux.density;em.IR.4-8umfloatnullablee_[5.8][0.01/0.6]? Uncertainty in [5.8]magstat.errorfloatnullablel_[8.0][>] Lower limit flag on [8.0]meta.code.errorchar[8.0][3/22.2]? Spitzer/IRAC 8.0{mu}m band magnitude (1)magphot.flux.density;em.IR.8-15umfloatnullablee_[8.0][0.01/0.81]? Uncertainty in [8.0]magstat.errorfloatnullablel_[24][>] Lower limit flag on [24]meta.code.errorchar[24][-0.6/18]? Spitzer/MIPS 24{mu}m band magnitude (1)magphot.flux.density;em.IR.15-30umfloatnullablee_[24][0.01/0.6]? Uncertainty in [24]magstat.errorfloatnullablel_[70]Limit flag on [70]meta.code.errorchar[70][-3.7/1.1]? Spitzer/MIPS 70{mu}m band magnitude (1)magphot.flux.density;em.IR.30-60umfloatnullablee_[70][0.1/0.13]? Uncertainty in [70]magstat.errorfloatnullablelogFX[-7.1/-3.9]? Log X-ray flux (in erg/s/cm^2^) (logfx)log(mW.m**-2)phot.flux;em.X-rayfloatnullablee_logFX[0.01/0.42]? Error in logFX (logfxerr)log(mW.m**-2)stat.errorfloatnullablelogLX[27.9/30.8]? Log X-ray luminosity (in erg/s) (loglx)log(1e-07W)phys.luminosity;em.X-rayfloatnullableSpTSpectral type (SpTy)src.spTypecharr_SpTLiterature origin of SpT (SpTySrc) (2)meta.ref;pos.framecharTeff[1900/7000]? Effective temperature from Foster et al. 2015 (cat. J/ApJ/799/136)Kphys.temperature.effectiveintnullablealpha[-4.41/5.83]? SED slope from 2 to 24{mu}m (see Section 4.4) (oursedslope24) (3)spect.indexfloatnullableClSED class from 2 to 24{mu}m (I, II, III, or flat) (oursedclass24) (4)meta.code.classcharYSOl[0/1]?=0 Is this a literature YSO? (1=yes, null=no) (YSOlit)meta.codeintnullableYSOs[0/1]?=0 Is this a part of standard YSOs set? (1=yes, null=no); see Section 4.5 for details (YSOstd)meta.codeintnullableYSOx[0/1]? Was this selected for standard set of YSOs based on X-rays? (1=yes, null=no); see Section 4.5 for detailsmeta.codeintnullableYSOa[0/1]?=0 Is this a part of augmented set of YSOs? (1=yes, null=no); see Section 4.6 for details (YSOaug)meta.codeintnullableCY[0/1]?=0 Is this Cryo-to-YSOVAR (CY) variable? (1=yes, null=no); see Section 4.3 for details (CYvar)meta.codeintnullableVar[0/1]? Is this variable over the YSOVAR campaign? (1=yes, null=no); see Section 4.2meta.codeintnullableMm[0/1]?=0 Is this a newly identified member based on variability? (1=yes, null=no) (VarMem) (5)meta.codeintnullableN3.6[0/73]? Number of points in 3.6{mu}m band for YSOVAR campaign (Npts_i1)meta.numberintnullable<[3.6]>[6.66/16.6]? Mean 3.6{mu}m band magnitude (Mean_i1)magphot.mag;em.IR.3-4umfloatnullablemed3.6[6.66/16.64]? Median 3.6{mu}m band magnitude (Median_i1)magstat.fit.paramfloatnullables3.6[0.01/0.3]? Standard 3.6{mu}m band deviation (Sdev_i1)magstat.stdevfloatnullableM3.6[6.69/16.8]? Maximium 3.6{mu}m band magnitude (Max_i1)magphot.mag;em.IR.3-4umfloatnullablem3.6[6.64/16.5]? Minimum 3.6{mu}m band magnitude (Min_i1)magphot.mag;em.IR.3-4umfloatnullableL3.6[2.96/33.47]? Length of 3.6{mu}m band light curve (Range_JD_i1)dtime.intervalfloatnullableA3.6[0.02/0.74]? Amplitude of 3.6{mu}m band light curve (Ampl1090_i1) (6)magsrc.var.amplitudefloatnullablechi3.6[0.03/567.5]? The {chi}^2^ for 3.6{mu}m band (Chisq_i1) (7)meta.notefloatnullablet3.6[1/22]? Timescale for 3.6{mu}m band (Timescale_i1)dtime.scalefloatnullableP3.6[1.4/13.4]? Period for 3.6{mu}m band, if applicable (Period_i1)dtime.periodfloatnullableMm1[-1.14/0.52]? M metric for 3.6{mu}m band (M_i1) (8)stat.fit.paramfloatnullableMs1[-0.9/0.3]? M metric for smoothed 3.6{mu}m band (Ms_i1) (8)stat.fit.paramfloatnullableQm1[-3.75/4.76]? Q metric for 3.6{mu}m band (Q_i1) (8)stat.fit.paramfloatnullableQl1[-14.71/40.31]? Q metric for long-term-trend-subtracted 3.6{mu}m band (Qlt_i1) (8)stat.fit.paramfloatnullableN4.5[0/73]? Number of points in 4.5{mu}m band for YSOVAR campaign (Npts_i2)meta.numberintnullable<[4.5]>[6.47/16.33]? Mean 4.5{mu}m band magnitude (Mean_i2)magphot.mag;em.IR.4-8umfloatnullablemed4.5[6.47/16.31]? Median 4.5{mu}m band magnitude (Median_i2)magstat.fit.paramfloatnullables4.5[0.01/0.21]? Standard 4.5{mu}m band deviation (Sdev_i2)magstat.stdevfloatnullableM4.5[6.49/16.51]? Maximium 4.5{mu}m band magnitude (Max_i2)magphot.mag;em.IR.4-8umfloatnullablem4.5[6.45/16.2]? Minimum 4.5{mu}m band magnitude (Min_i2)magphot.mag;em.IR.4-8umfloatnullableL4.5[1.54/33.5]? Length of 4.5{mu}m band light curve (Range_JD_i2)dtime.intervalfloatnullableA4.5[0.01/0.51]? Amplitude of 4.5{mu}m band light curve (Ampl1090_i2) (6)magsrc.var.amplitudefloatnullablechi4.5[0.02/633.3]? The {chi}^2^ for 4.5{mu}m band (Chisq_i2) (7)meta.notefloatnullablet4.5[0.95/22]? Timescale for 4.5{mu}m band (Timescale_i2)dtime.scalefloatnullableP4.5[1.4/13.9]? Period for 4.5{mu}m band, if applicable (Period_i2)dtime.periodfloatnullableMm2[-1.4/0.7]? M metric for 4.5{mu}m band (M_i2) (8)stat.fit.paramfloatnullableMs2[-0.7/0.3]? M metric for smoothed 4.5{mu}m band (Ms_i2) (8)stat.fit.paramfloatnullableQm2[-4.6/5.8]? Q metric for 4.5{mu}m band (Q_i2) (8)stat.fit.paramfloatnullableQl2[-161.9/83.9]? Q metric for long-term-trend-subtracted 4.5{mu}m band (Qlt_i2) (8)stat.fit.paramfloatnullable<CI>[0/2.45]? Mean 3.6-4.5{mu}m band color index (Mean_i1i2)magphot.color;em.IR;em.IRfloatnullablesCI[0.01/0.2]? Standard 3.6-4.5{mu}m band color index deviation (Sdev_i1i2)magstat.stdevfloatnullablePCI[5.5/9.8]? Period for 3.6-4.5{mu}m band color index, if applicable (Period_i1i2)dtime.periodfloatnullableStet[0/0.7]? Stetson index for 3.6, 4.5{mu}m bands (Stetson_i1i2) (9)meta.code;spect.indexfloatnullableC3.6[-0.52/0.97]? Correlation coefficient for 3.6 vs. 3.6-4.5{mu}m band color color-magnitude diagram (Correl_i1i1i2)stat.correlationfloatnullableProb1[0/0.74]? Probability that correlation is real in 3.6 vs. 3.6-4.5{mu}m band color CMD (CorrelProb_i1i1i2)stat.correlationfloatnullableC4.5[-0.97/0.82]? Correlation coefficient for 4.5 vs. 3.6-4.5{mu}m band color CMD (Correl_i2i1i2)stat.correlationfloatnullableProb2[0/0.7]? Probability that correlation is real in 4.5 vs. 3.6-4.5{mu}m band color CMD (CorrelProb_i2i1i2)stat.correlationfloatnullableJ/AJ/150/175/table5Large-amplitude variablesNoteNotesmeta.notecharSampleSamplesrc.samplecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSSTYSVDesignation within the Spitzer Space Telescope (SST) Young Stellar Object VARiability (YSOVAR) program (HHMMSS.ss+DDMMSS.s; J2000) (cat) (1)meta.id;meta.maincharSimbadSimbad column added by the CDSmeta.ref.urlchar