The 2nd MSFRs Omnibus X-ray Catalog (MOXC2)J/ApJS/235/43ivo://CDS.VizieR/J/ApJS/235/43doi:10.26093/cds/vizier.22350043CDSTownsley L.K.Broos P.S.Garmire G.P.Anderson G.E.Feigelson E.D.,Naylor T.Povich M.S.2020-09-01T08:47:01Z2020-06-05T12:14:44ZCDS support teamCDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, Francecds-question@unistra.frstar-forming-regionsh-ii-regionsx-ray-sourcesWe present the second installment of the Massive Star-forming Regions (MSFRs) Omnibus X-ray Catalog (MOXC2), a compilation of X-ray point sources detected in Chandra/ACIS observations of 16 Galactic MSFRs and surrounding fields. MOXC2 includes 13 ACIS mosaics, three containing a pair of unrelated MSFRs at different distances, with a total catalog of 18396 point sources. The MSFRs sampled range over distances of 1.3kpc to 6kpc and populations varying from single massive protostars to the most massive Young Massive Cluster known in the Galaxy. By carefully detecting and removing X-ray point sources down to the faintest statistically significant limit, we facilitate the study of the remaining unresolved X-ray emission. Through comparison with mid-infrared images that trace photon-dominated regions and ionization fronts, we see that the unresolved X-ray emission is due primarily to hot plasmas threading these MSFRs, the result of feedback from the winds and supernovae of massive stars. The 16 MSFRs studied in MOXC2 more than double the MOXC1 sample, broadening the parameter space of ACIS MSFR explorations and expanding Chandra's substantial contribution to contemporary star formation science.2018ApJS..235...43Thttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/235/43CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/chandra : The Chandra Archive Log (CXC, 1999-2014)IX/45 : The Chandra Source Catalog, Release 1.1 (Evans+ 2012)IX/57 : The Chandra Source Catalog (CSC), Release 2.0 (Evans+, 2019)VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)J/ApJ/454/151 : OB Associations of the Northern Milky Way (Massey+ 1995)J/ApJ/566/945 : Massive star forming regions at 1.2mm (Beuther+, 2002)J/A+A/426/119 : 1.2mm mapping of RCW 106 Giant MoC (Mookerjea+, 2004)J/A+A/440/121 : K magnitudes of OB stars in UCHIIs (Bik+, 2005)J/ApJS/160/319 : COUP: observations and source lists (Getman+, 2005)J/A+A/438/1163 : Catalogue of Open Cluster Data (COCD) (Kharchenko+, 2005)J/ApJ/635/560 : New star clusters in the GLIMPSE survey (Mercer+ 2005)J/ApJ/649/759 : Bubbles in the galactic disk (Churchwell+, 2006)J/A+A/445/971 : Mid-infrared images of W75N (Persi+, 2006)J/ApJ/670/428 : Bubbles in the galactic disk. II. (Churchwell+, 2007)J/ApJ/665/1297 : X-ray sources around G12.82-0.02 (Helfand+, 2007)J/A+A/472/835 : JHKs and GLIMPSE photometry of RCW 120 (Zavagno+, 2007)J/A+A/477/147 : X-ray sources in Westerlund 1 (Clark+, 2008)J/A+A/496/177 : JHKs and GLIMPSE photometry of RCW 120 (Deharveng+, 2009)J/AJ/138/227 : Stellar clusters in NGC 6334 complex (Feigelson+, 2009)J/ApJ/694/546 : IR dust bubbles. II. YSOs model parameters (Watson+, 2009)J/ApJ/708/1760 : Flux estimations of faint X-ray sources (Getman+, 2010)J/ApJ/714/L285 : YSO candidates in M17 SWex (Povich+, 2010)J/ApJS/194/2 : Chandra Carina Complex Project (CCCP) catalog (Broos+, 2011)J/ApJS/194/5 : Carina OB stars in the CCCP catalog (Gagne+, 2011)J/ApJS/194/7 : X-ray properties of O and B stars in Carina (Naze+, 2011)J/ApJS/194/14 : A Pan-Carina YSO catalog (Povich+, 2011)J/ApJS/194/15 : CCCP: Carina's diffuse X-ray emission (Townsley+, 2011)J/MNRAS/419/1887 : Young stellar objects in NGC 6823 (Riaz+, 2012)J/A+A/545/A51 : 1.4mm & 3mm interferometry of IRAS 19410+2336 (Rodon+, 2012)J/A+A/538/A142 : OB stars in NGC 6334 and NGC 6357 (Russeil+, 2012)J/ApJS/209/32 : Probable young stars in the MYStIX project (Broos+, 2013)J/ApJS/209/27 : MYStIX: the Chandra X-ray sources (Kuhn+, 2013)J/MNRAS/435/400 : ATLASGAL. Compact HII regions (Urquhart+, 2013)J/ApJ/778/96 : Spitzer and NEWFIRM observations of NGC 6334 (Willis+, 2013)J/ApJS/212/13 : ChIcAGO. I. Sample and initial results (Anderson+, 2014)J/A+A/572/A63 : Intensity maps in W33 (Immer+, 2014)J/MNRAS/443/3218 : NGC 7538 IRS 1-3 and IRS 9 sources (Mallick+, 2014)J/ApJS/215/15 : SMaSH+: observations and companion detection (Sana+, 2014)J/ApJS/213/1 : The MSFRs Omnibus X-ray Catalog (MOXC) (Townsley+, 2014)J/ApJS/219/41 : VLA & Chandra obs. of IRAS20126+4104 region (Montes+, 2015)J/AJ/152/31 : Spectral classif. of OVz stars from GOSSS (Arias+, 2016)J/ApJS/224/4 : GOSSS III. Additional O-type systems (Maiz Apellaniz+, 2016)J/A+A/587/A135 : Halpha images of NGC 6334 and NGC 6357 (Russeil+, 2016)J/A+A/605/A61 : NGC 7538 IRS1 VLA maps in CH_3_OH and NH_3_ (Beuther+, 2017)J/ApJ/843/33 : SOFIA Massive Star Formation Survey. I. (De Buizer+, 2017)J/A+A/600/A93 : Multiwavelength fluxes of RCW120 (Figueira+, 2017)J/ApJS/229/28 : SFiNCs: X-ray, IR and membership catalogs (Getman+, 2017)J/MNRAS/467/2943 : NGC 7538 region YSOs (Sharma+, 2017)J/A+A/602/A77 : HOBYS: 46 MDCs found in NGC 6334 (Tige+, 2017)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/235/43https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/235/43http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/235/43https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/235/43https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/235/43http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/235/43GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/235/43/table1 (The Massive Star-forming Regions (MSFRs) Omnibus X-ray Catalog (MOXC2) targets)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/235/43/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/235/43/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/235/43/table1?GETtext/xml+votable180.050000true259.94625-36.1430560.005555555555555556Cone search capability for table J/ApJS/235/43/moxc2 (MOXC2 X-ray sources and properties)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/235/43/moxc2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/235/43/moxc2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/235/43/moxc2?GETtext/xml+votable180.050000true259.04734694-36.322471110.005555555555555556Cone search capability for table J/ApJS/235/43/table2 (Log of Chandra observations)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/235/43/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/235/43/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/235/43/table2?GETtext/xml+votable180.050000true260.225-35.78441670.0055555555555555565/10543 10614 6/14316 14317 14352 14353 14355 14655 14689 14704 14705 14741 29088 29090 29091 29097 29101 29103 30218 30219 30318 42169 42206 42207 42228 42229 42441 42444 42445 42447https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/235/43?format=asciiX-raydefault
J/ApJS/235/43/table1The Massive Star-forming Regions (MSFRs) Omnibus X-ray Catalog (MOXC2) targetsSimbadNameSimbad column added by the CDSmeta.idcharGLAT[-0.5/3.7] Galactic latitudedegpos.galactic.latfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMSFRMassive star forming region namemeta.id;meta.maincharprimaryGLON[10.3/351] Galactic longitudedegpos.galactic.lonRAJ2000Hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of declination (J2000)pos.eq.dec;meta.mainDist[1.3/6] Distance from the literature or estimated in this paperkpcpos.distance;pos.heliocentricfloatr_DistReference(s)meta.ref;pos.framecharScale[0.5/2.7] Image scale assuming "Dist" valuearcmin/pcinstr.scalefloatAv[3/200] Approximate average absorption (1)magphys.absorptionintExp[8/79] Nominal exposure time (2)kstime.duration;obs.exposureintlogLtc[29.6/31.8] log of total band (0.5-8keV) luminosity, corrected for extinction (3)log(1e-07W)phys.luminosity;em.X-rayfloatM50[0.3/1.8]? Limiting mass M_50%_ corresponding to limiting luminosity L_tc_solMassphys.massfloatnullablef_M50b: bright (4)meta.codecharNx[288/4674] Total number of X-ray point sources found across the entire mosaicmeta.numberintn_NxSame X-ray point sources for the MSFR cited in this columnmeta.notecharMOXC1Region also studied in MOXC1 (Townsley+, 2014, J/ApJS/213/1)meta.ref.urlintnullableNobsNumber of Chandra observations for this region (link to Table 2)meta.numberintnullable
J/ApJS/235/43/moxc2MOXC2 X-ray sources and propertiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMSFRName of the massive star forming region (REGIONNAME)obs.fieldcharCXOUX-ray source name in IAU format (HHMMSS.ss+DDMMSS.s; J2000) (Name) (1)meta.id;meta.maincharf_CXOUp: source exhibiting photon pile-up; column added by CDS (see Note 7)meta.codecharLabelX-ray source name used within the project (2)meta.id;obscharRAJ2000[244.5/348.9] Right ascension (J2000) (1)degpos.eq.ra;meta.mainindexedDEJ2000[-51.2/61.8] Declination (J2000) (1)degpos.eq.dec;meta.mainindexedePos[0.01/5.7] 1-{sigma} error circle around (RAdeg,DEdeg) (PosErr)arcsecstat.errorfloatPosTypeAlgorithm used to estimate position (Broos+ 2010ApJ...714.1582B Section 7.1)meta.id;stat.fitcharno-m[0/0.01] Smallest of no-t, no-s and no-h (ProbNoSrc_MostValid) (3)stat.fit.goodnessdoubleno-t[0/0.5] p-value for no-source hypothesis in the total (0.5-8 keV) energy band (ProbNoSrc_t) (4)stat.fit.goodnessdoubleno-s[0/1]? p-value for no-source hypothesis in the soft (0.5-2 keV) energy band 2012A&A...539A..79R (ProbNoSrc_s) (4)stat.fit.goodnessdoublenullableno-h[0/1]? p-value for no-source hypothesis in the hard (2-8 keV) energy band (ProbNoSrc_h) (4)stat.fit.goodnessdoublenullableKS-S[0/1]? smallest p-value under the null hypothesis (no variability within each single ObsID) for the Kolmogorov-Smirnov test on the timestamps of each ObsID's event list (ProbKS_single) (5)stat.fit.goodness;src.vardoublenullableKS-M[0/1]? p-value under the null hypothesis (no variability) for the Kolmogorov-Smirnov test on the timestamps of the multi-ObsID event list (ProbKS_merge) (5)stat.fit.goodness;src.vardoublenullableChi2[0/1]? p-value under the null hypothesis (no variability) for the {chi}^2^ test on the single-ObsID measurements of Flux-t (ProbChisq_PhotonFlux)stat.fit.chi2doublenullableExpNom[1015/147545] Total exposure in merged observations (ExposureTimeNominal)stime.expodoubleExpFrac[0.07/1] Fraction of ExpNom source was observed (ExposureFraction) (6)stat.fit.omcdoubleCt[0/0.5] 0.5-8keV rate in 3x3 CCD pixel cell in count/frame (RateIn3x3Cell) (7)ctpos.cartesian.ydoubleNobs[1/4] Total number of observations extracted (NumObsIDs)meta.numberintNph[1/4] Number of observations merged to estimate photometry properties (NumMerged)meta.numberintFdis[0/1] Fraction of exposure discarded to optimize merge (MergeBias)stat.fit.omcdoubleb_theta[0.01/25] Smallest value of {theta} (Theta_Lo)arcminstat.valuedoubletheta[0.04/25] Average off-axis angle {theta} for merged observations (Theta)arcmininstr.offsetdoubleB_theta[0.04/27.4] Largest value of {theta} (Theta_Hi)arcminstat.value;stat.maxdoublePSFf[0.3/1] Average PSF fraction at 1.49keV for merged observations (PsfFraction)instr.det.psfdoubleArea[0.7/31950] Average aperture area for merged observations in (0.492arcsec)^2^ units (SrcArea)pixel**2phys.area;instrdoubleaglow[0/0.7]? Suspected afterglow fraction, 0.5-8keV (AfterglowFraction) (8)stat.fit.paramdoublenullableCts-t[0/8598] Extracted 0.5-8keV counts in merged apertures (SrcCounts_t)ctphot.count;em.X-rayintCts-s[0/2189] Extracted 0.5-2keV counts in merged apertures (SrcCounts_s)ctphot.count;em.X-rayintCts-h[0/8320] Extracted 2-8keV counts in merged apertures (SrcCounts_h)ctphot.count;em.X-rayintbgScl[0.4/13937] Scaling of background extraction (BkgScaling)instr.backgrounddoubleBcts-t[3/6732] Extracted 0.5-8keV counts in merged background regions (BkgCounts_t)ctinstr.background;em.X-ray.mediumintBcts-s[0/1088] Extracted 0.5-2keV counts in merged background regions (BkgCounts_s)ctinstr.background;em.X-ray.softintBcts-h[0/6543] Extracted 2-8keV counts in merged background regions (BkgCounts_h)ctinstr.background;em.X-ray.mediumintb_Ncts-t[0/8460]? 1-{sigma} lower bound on Ncts-t (NetCounts_Lo_t) (9)ctphot.count;em.X-ray;stat.mindoublenullableNcts-t[-0.4/8553] Net 0.5-8keV counts in merged apertures (NetCounts_t)ctphot.count;em.X-raydoubleB_Ncts-t[1/8647] 1-{sigma} upper bound on Ncts-t (NetCounts_Hi_t) (9)ctphot.count;em.X-ray;stat.maxdoubleb_Ncts-s[0/2136]? 1-{sigma} lower bound on Ncts-s (NetCounts_Lo_s) (9)ctphot.count;em.X-ray;stat.mindoublenullableNcts-s[-10.2/2183] Net 0.5-2keV counts in merged apertures (NetCounts_s)ctphot.count;em.X-raydoubleB_Ncts-s[0/2230] 1-{sigma} upper bound on Ncts-s (NetCounts_Hi_s) (9)ctphot.count;em.X-ray;stat.maxdoubleb_Ncts-h[0/8186]? 1-{sigma} lower bound on Ncts-h (NetCounts_Lo_h) (9)ctphot.count;em.X-ray;stat.mindoublenullableNcts-h[-20.1/8278] Net 2-8keV counts in merged apertures (NetCounts_h)ctphot.count;em.X-raydoubleB_Ncts-h[0.5/8370] 1-{sigma} upper bound on Ncts-h (NetCounts_Hi_h) (9)ctphot.count;em.X-ray;stat.maxdoubleArea-t[12/293] Mean effective area (ARF value) in cm2.count/photon in 0.5-8keV (MeanEffectiveArea_t) (10)cm**2.count.ph**-1phys.area;instrdoubleArea-s[16.5/515] Mean effective area (ARF value) in cm2.count/photon in 0.5-2keV (MeanEffectiveArea_s) (10)cm**2.count.ph**-1phys.area;instrdoubleArea-h[10.4/238] Mean effective area (ARF value) in cm2.count/photon in 2-8keV (MeanEffectiveArea_h) (10)cm**2.count.ph**-1phys.area;instrdoubleEmed-t[0.5/7.6]? Median 0.5-8keV energy, observed spectrum (MedianEnergy_t)keVem.energyfloatnullableEmed-s[0.5/2]? Median 0.5-2keV energy, observed spectrum (MedianEnergy_s)keVem.energyfloatnullableEmed-h[2/8]? Median 2-8keV energy, observed spectrum (MedianEnergy_h)keVem.energyfloatnullableFlux-t[-7.7e-8/0.0014] Incident total (0.5-8keV) photon flux: NCts-t/Area-t/ExpNom (PhotonFlux_t) (11)ph.cm**-2.s**-1phot.flux;em.X-raydoubleFlux-s[-2.2e-6/0.00011] Incident soft (0.5-2keV) photon flux: NCts-s/Area-s/ExpNom (PhotonFlux_s) (11)ph.cm**-2.s**-1phot.flux;em.X-raydoubleFlux-h[-1.7e-5/0.0016] Incident hard (2-8keV) photon flux: NCts-h/Area-h/ExpNom (PhotonFlux_h) (11)ph.cm**-2.s**-1phot.flux;em.X-raydoubleEFlx-t[0/1.1e-11] Total (0.5-8keV) energy flux max (EFlx_s>0_)+max(EFlx_h,0_) (EnergyFlux_t)(12)mW.m**-2em.energydoubleEFlx-s[7.4e-20/2.6e-13]? Soft (0.5-2keV) apparent energy flux (EnergyFlux_s) (12)mW.m**-2em.energydoublenullableEFlx-h[2.5e-20/1.1e-11]? Hard (2-8keV) apparent energy flux (EnergyFlux_h) (12)mW.m**-2em.energydoublenullable
J/ApJS/235/43/table2Log of Chandra observationsObsID[1827/18876] Chandra ObsIDmeta.noteintTargetChandra target namemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMSFRMassive star forming region nameobs.fieldcharDateStart time of the observation (UT date)stime.start;obsnullableExp[1015/62810] Exposure time (1)stime.duration;obs.exposureintCCDAimpoint CCD (2)instr.setupcharRAJ2000Aimpoint hour of right ascension (J2000) (2)pos.eq.ra;meta.mainDEJ2000Aimpoint degree of declination (J2000) (2)pos.eq.dec;meta.mainRoll[5/358] Roll angledeginstr.offsetintModeACIS observing mode (3)instr.setupcharDet[123/235678] Detectors (4)instr.setupintPIPersonal investigatorobs.observercharTGAINACIS Time-Dependent Gain file used for calibration of event energies (5)meta.id;meta.filechar