J/ApJS/209/31ivo://CDS.VizieR/J/ApJS/209/31doi:10.26093/cds/vizier.22090031CDSPovich M.S.Kuhn M.A.Getman K.V.Busk H.A.Feigelson E.D.Broos P.S.,Townsley L.K.King R.R.Naylor T.2014-02-10T15:41:18Z2014-01-23T12:40:37ZCDS support team

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

cds-question@unistra.frinfrared-photometrypre-main-sequence-starsyoung-stellar-objectsh-ii-regionsopen-star-clustersThe Massive Young Star-Forming Complex Study in Infrared and X-rays (MYStIX) project provides a comparative study of 20 Galactic massive star-forming complexes (d=0.4-3.6kpc). Probable stellar members in each target complex are identified using X-ray and/or infrared data via two pathways: X-ray detections of young/massive stars with coronal activity/strong winds or (2) infrared excess (IRE) selection of young stellar objects (YSOs) with circumstellar disks and/or protostellar envelopes. We present the methodology for the second pathway using Spitzer/IRAC, 2MASS, and UKIRT imaging and photometry. Although IRE selection of YSOs is well-trodden territory, MYStIX presents unique challenges. The target complexes range from relatively nearby clouds in uncrowded fields located toward the outer Galaxy (e.g., NGC 2264, the Flame Nebula) to more distant, massive complexes situated along complicated, inner Galaxy sightlines (e.g., NGC 6357, M17). We combine IR spectral energy distribution (SED) fitting with IR color cuts and spatial clustering analysis to identify IRE sources and isolate probable YSO members in each MYStIX target field from the myriad types of contaminating sources that can resemble YSOs: extragalactic sources, evolved stars, nebular knots, and even unassociated foreground/background YSOs. Applying our methodology consistently across 18 of the target complexes, we produce the MYStIX IRE Source (MIRES) Catalog comprising 20719 sources, including 8686 probable stellar members of the MYStIX target complexes. We also classify the SEDs of 9365 IR counterparts to MYStIX X-ray sources to assist the first pathway, the identification of X-ray-detected stellar members.2013ApJS..209...31Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/209/31CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/293 : GLIMPSE Source Catalog (I + II + 3D) (IPAC 2008)J/ApJS/209/27 : MYStIX: the Chandra X-ray sources (Kuhn+, 2013)J/ApJS/209/28 : MYStIX Wide-Field NIR data: crowded fields (King+, 2013)J/ApJS/209/29 : MYStIX: MIR observations and catalogs (Kuhn+, 2013)J/ApJS/209/30 : MYStIX: Bayesian matching (Naylor+, 2013)J/ApJS/209/32 : MYStIX probable young stars (MPCM) (Broos+, 2013)J/A+A/553/A48 : Near-infrared variability in RCW 38 (Doerr+, 2013)J/ApJS/194/10 : NIR properties of YSO in the CCCP (Preibisch+, 2011)J/ApJ/741/35 : NIR photometry and polarization in NGC 2264 (Kwon+, 2011)J/ApJ/714/L285 : YSO candidates in M17 SWex (Povich+, 2010)J/MNRAS/407/1170 : IRAC photometry of M8 (Kumar+, 2010)J/MNRAS/392/1034 : IZJHKL' photometry of NGC 6611 (Oliveira+, 2009)J/AJ/138/1116 : A Spitzer view of NGC 2264 (Sung+, 2009)J/ApJ/698/1 : Spitzer observations of NGC 2362 (Currie+, 2009)J/ApJ/696/1278 : The extended star-forming environment of M17 (Povich+, 2009)J/A+A/488/211 : Infrared photometry of NGC 1893 (Caramazza+, 2008)J/MNRAS/384/675 : Monitoring low-mass stars in NGC 2362 (Irwin+ 2008)J/ApJS/169/353 : Chandra sources in M17 (Broos+, 2007)J/ApJS/168/100 : X-ray study of star-forming region NGC 6357 (Wang+, 2007)J/AJ/133/2072 : Spitzer observations of NGC 2362 (Dahm+, 2007)J/ApJ/671/605 : NGC 2264 and ONC PMS stars in the infrared (Cieza+, 2007)J/ApJ/642/972 : IR phot. of a star-forming core in NGC 2264 (Young+, 2006)J/AJ/130/1145 : YSO near-infrared properties (Doppmann+, 2005)J/ApJ/562/446 : X-rays and protostars in Trifid nebula (Rho+, 2001)J/A+A/355/651 : HRI observations of PMS stars in NGC 2264 (Flaccomio+, 2000)J/A+AS/121/223 : Multiphotometry of NGC 6611 (de Winter+ 1997)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/209/31https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/209/31http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/209/31https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/209/31https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/209/31http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/209/31GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/209/31/table3 (MIRES (MYStIX IR Excess Source) catalog)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/209/31/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/209/31/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/209/31/table3?GETtext/xml+votable180.050000true85.1015139-1.46511890.0055555555555555565/5713 10614 10615 6/1285 1287 1296 1298 3307 3310 3649 14682 14704 22243 22246 22248 22249 22251 22252 22861 22866 22872 23636 23637 23639 28890 28891 28912 28913 28915 28916 29113 29115 29116 29118 29119 29461 29463 29504 29506 30254 30255 30340 30341 30343 30352 30354 37850 37861 37863 37872 37884 37921 37922 37923 37924 37926 39907 39910 399132.0616683193919197e-20 1.7798557115773645e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/209/31?format=asciiInfrareddefaultJ/ApJS/209/31/table3MIRES (MYStIX IR Excess Source) catalogXNumber of X-ray sourcesphys.luminosity;em.X-rayintnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMIRESSource name in IRAC catalog (GLIMPSE or Kuhn et al., 2013, Cat. J/ApJS/209/29); \dicS{MIRES GLLL.llll+BB.bbbb} in Simbadmeta.id;meta.maincharRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainJmag[8/22]? J-band magnitude used for SED fittingmagphot.mag;em.IR.Jfloatnullablee_Jmag? Jmag uncertainty (1)magstat.error;phot.mag;em.IR.Jfloatnullablen_Jmag[-1/1] Provenance of the J source matched to IRAC source (0=2MASS, 1=UKIRT, -1=none)meta.noteintHmag? H-band magnitude used for SED fittingmagphot.mag;em.IR.Hfloatnullablee_Hmag? Hmag uncertainty (1)magstat.error;phot.mag;em.IR.Hfloatnullablen_Hmag[-1/1] Provenance of the H source matched to IRAC source (0=2MASS, 1=UKIRT, -1=none)meta.noteintKsmag? Ks-band magnitude used for SED fittingmagphot.mag;em.IR.Kfloatnullablee_Ksmag? Ksmag uncertainty (1)magstat.error;phot.mag;em.IR.Kfloatnullablen_Ksmag[-1/1] Provenance of the Ks source matched to IRAC source (0=2MASS, 1=UKIRT, -1=none)meta.noteint[3.6][5/19]? Spitzer/IRAC 3.6um magnitude used for SED fittingmagphot.mag;em.IR.3-4umfloatnullablee_[3.6]? [3.6] uncertainty (1)magstat.errorfloatnullable[4.5]? Spitzer/IRAC 4.5um magnitude used for SED fittingmagphot.mag;em.IR.4-8umfloatnullablee_[4.5]Uncertainty in [4.5]; if "99.99", [4.5] is an {\fg{red3}upper limit}magstat.errorfloatnullable[5.8]? Spitzer/IRAC 5.8um magnitude used for SED fittingmagphot.flux.density;em.IR.4-8umfloatnullablee_[5.8]? [5.8] uncertainty (1)magstat.errorfloatnullable[8.0][2/16]? Spitzer/IRAC 8.0um magnitude used for SED fittingmagphot.flux.density;em.IR.8-15umfloatnullablee_[8.0]? [8.0] uncertainty (1)magstat.errorfloatnullableMIRCross-match with MYStIX mid-IR (Kuhn et al, 2013, Cat. J/ApJS/209/29) within 2"meta.ref.urlintnullableIRlabUKIRT catalog label (King et al., 2013, Cat. J/ApJS/209/28) matched to IRAC sourcemeta.id;obscharNm[0/1] Number of UKIRT sources providing possible alternative matches to IRAC sourcemeta.numberintCl[0/3] SED classification flag: 0=likely YSO, 1=starburst galaxy, 2=AGN, 3=PAH knotsrc.classintchi2[0/18] Reduced {chi}^2^ of best-fit SED model (2)stat.fit.chi2floatAv[0/81] Visual extinction A_V_ (3)magphys.absorption;em.opt.VfloatSt[-1/2] Evolutionary Stage classification (4)src.classintcplx[0/1]? Complex member probability (Prob_dens) (5)stat.fit.goodnessfloatnullableMm[0/1] Membership flag (1=probable member of target MSFR [Reg] (8686 sources), 0 otherwise)meta.code.errorintfx[0/1] FOV flag (1=source falls within Chandra field-of-view for MYStIX, 0 otherwise)meta.codeintRegName of MYStIX Galactic massive star-forming regions (MSFR) \iflay\else(\pFile{_600x300}{/VizieR/intro/mystix-reg.htx}{list of regions})\fimeta.id.parentchar