J/ApJS/213/23ivo://CDS.VizieR/J/ApJS/213/23doi:10.26093/cds/vizier.22130023CDSNaze Y.Wang Q.D.Chu Y.-H.Gruendl R.Oskinova L.2018-01-12T09:11:06Z2014-09-17T08:04:32ZCDS support team

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

cds-question@unistra.frx-ray-sourcesh-ii-regionsmagellanic-cloudsastronomical-object-identificationinfrared-sourcesA very sensitive X-ray investigation of the giant H II region N11 in the Large Megallanic Cloud was performed using the Chandra X-ray Observatory. The 300ks observation reveals X-ray sources with luminosities down to 10^32^erg/s, increasing the number of known point sources in the field by more than a factor of five. Among these detections are 13 massive stars (3 compact groups of massive stars, 9 O stars, and one early B star) with log (L_X_/L_BOL_)~-6.5 to -7, which may suggest that they are highly magnetic or colliding-wind systems. On the other hand, the stacked signal for regions corresponding to undetected O stars yields log (L_X_/L_BOL_)~-7.3, i.e., an emission level comparable to similar Galactic stars despite the lower metallicity. Other point sources coincide with 11 foreground stars, 6 late-B/A stars in N11, and many background objects. This observation also uncovers the extent and detailed spatial properties of the soft, diffuse emission regions, but the presence of some hotter plasma in their spectra suggests contamination by the unresolved stellar population.2014ApJS..213...23Nhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/213/23CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/chandra : The Chandra Archive Log (CXC, 1999-2014)II/288 : IRSF Magellanic Clouds Point Source Catalog (Kato+ 2007)II/228 : DENIS Catalogue toward Magellanic Clouds (DCMC) (Cioni+ 2000)J/A+A/555/A83 : X-ray properties of HM1 and IC2944/2948 (Naze+, 2013)J/ApJ/747/107 : QSO Candidates in the MACHO LMC database (Kim+, 2012)J/ApJS/194/7 : X-ray properties of O and B stars in Carina (Naze+, 2011)J/A+A/506/1055 : Hot stars emitting in X-ray. I. (Naze, 2009)J/ApJS/184/172 : High- and intermediate-mass YSOs in the LMC (Gruendl+, 2009)J/AJ/136/18 : LMC SAGE. New candidate YSOs (Whitney+, 2008)J/AJ/132/2653 : JHKs photometry of N11 young stellar objects (Hatano+, 2006)J/ApJS/160/319 : COUP: observations and source lists (Getman+, 2005)J/A+A/418/841 : XMM-Newton observations of N11 in the LMC (Naze+, 2004)J/AJ/128/1606 : Magellanic Clouds Photometric Survey: LMC (Zaritsky+, 2004)J/AJ/125/1940 : JHKs photometry in LMC HII region N11B (Barba+, 2003)J/AJ/118/1684 : UBV photometry of 4 LMC compact OB groups (Walborn+, 1999)J/AJ/103/1205 : Stellar Content of LH 9 and 10 in the LMC (Parker+ 1992)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/213/23https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/213/23http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/213/23https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/213/23https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/213/23http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/213/23GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/213/23/table2 (Chandra source list)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/213/23/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/213/23/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/213/23/table2?GETtext/xml+votable180.050000true73.6145-66.42166670.0055555555555555566/33126https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/213/23?format=asciiX-rayInfrareddefaultJ/ApJS/213/23/table2Chandra source listrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/165] Running source numbermeta.idintprimaryCXOUChandra identifier (JHHMMSS.ss+DDMMSS.s) (1)meta.id;meta.maincharePos[0.2/4.6] The 1{sigma} position uncertainty (2)arcsecstat.error;pos.posAngfloatCR[0.04/7.5] On-axis source total count rate (3)ct/ksphot.count;em.X-rayfloate_CRUncertainty in CRct/ksstat.errorfloatHR1[-1/1]? First hardness ratio (4)phot.flux;arith.ratiofloatnullablee_HR1? Uncertainty in HR1stat.errorfloatnullableHR2[-1/1]? Second hardness ratio (5)phot.flux;arith.ratiofloatnullablee_HR2? Uncertainty in HR2stat.errorfloatnullabletheta[0.2/11.4] Off-axis anglearcmininstr.offsetfloatCts[5/1000] Raw countsctphot.count;em.X-rayintbgCtBackground countsctinstr.backgroundfloatExpEffective exposures in the detection apertureksphys.angSize;instr.fovintDet[TSH] Detection flag (6)meta.code.errorcharXIDNumber of cross-identifications found within 1" (tables 3 and 4)meta.numberintnullableSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPositions from Chandra names (right ascension part)degpos.eq.ra;meta.main_DEPositions from Chandra names (declination part)degpos.eq.dec;meta.mainJ/ApJS/213/23/table3Counterparts to the X-ray sources within 1"recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/165] Running source numbermeta.id;meta.mainintf_Seq[*] Flag on Seq (1)meta.codecharOff2M[0.09/0.9]? 2MASS position offsetarcsecpos;arith.difffloatnullable2MASS2MASS counterpart ID (J2000; Cat. II/246)meta.idcharOffDC[0.1/0.8]? DCMC position offsetarcsecpos;arith.difffloatnullableDCMCDCMC counterpart identifier (Cat. II/228)meta.idcharOffGSC[0.09/1]? GSC position offsetarcsecpos;arith.difffloatnullableGSC2.3GSC-II counterpart identifier (Cat. I/305)meta.idcharOffH6[0.1/0.7]? Hatano et al. 2006, Cat. J/AJ/132/2653 position offsetarcsecpos;arith.difffloatnullable[HKN2006]Hatano et al. counterpart identifier (2)meta.idcharOffIR[0.1/1]? IRSF position offsetarcsecpos;arith.difffloatnullableIRSFIRSF counterpart ID (J2000; Cat. II/288) (3)meta.idcharOffMC[0.04/1]? MCPS position offset (4)arcsecpos;arith.difffloatnullableOffU[0.1/1]? USNO position offsetarcsecpos;arith.difffloatnullableUSNOUSNO-B1.0 counterpart identifier (Cat. I/284)meta.idcharJ/ApJS/213/23/table4Counterparts to X-ray sources found within 1" of our dedicated data (optical [SII] image, 3.6+8.0um Spitzer data) and suggested nature of the sourcesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/165] Running source numbermeta.id;meta.mainintSII?[y ] Emission from [SII] detected?meta.codechar3.6?[y ] Spitzer 3.6{mu}m emission detected? (1)meta.codechar8.0?[y ] Spitzer 8.0{mu}m emission detected? (1)meta.codecharOffset[0.09/1]? Spitzer position offsetarcsecpos;arith.difffloatnullableNameSpitzer identifier (HHMMSS.ss+DDMMSS.s) (1)meta.id.crosscharCommCommentmeta.notecharNatureSuggested nature of sourcesrc.classchar