J/ApJ/694/425ivo://CDS.VizieR/J/ApJ/694/425doi:10.26093/cds/vizier.16940425CDSSimon T.2017-12-18T07:57:02Z2011-04-01T13:41:57ZCDS support team

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

cds-question@unistra.frmolecular-cloudsx-ray-sourcesinfrared-photometryI report the results of a 60ks X-ray observation of the L1251 dark cloud in Cepheus, which was acquired with the ACIS-I camera on board the Chandra X-Ray Observatory. Forty-three compact X-ray sources were detected. The field of view was centered on the position of IRAS 22376+7455, an embedded Class 0/I protostar that is closely associated with the bright CO emission core, L1251B-Core E. A very intense impulsive X-ray flare was observed from a location within the formal error ellipse of the IRAS source and in close proximity (within <~1") to a thermal continuum radio source, VLA 3. Given their small spatial offsets, the radio, far-infrared, and X-ray objects appear to be identical and consequently the likely origin and driving source of high-velocity gas flows that are observed in L1251B.2009ApJ...694..425Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/694/425CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/chandra : The Chandra Archive Log (CXC, 1999-)J/A+A/272/235 : Stars in the dark cloud L1251 (Kun+ 1993)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/694/425https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/694/425http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/694/425https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/694/425https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/694/425http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/694/425GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/694/425/table2 (X-ray detections in L1251B)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/694/425/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/694/425/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/694/425/table2?GETtext/xml+votable180.050000true339.365583375.25711110.0055555555555555566/161978.650015785639275e-20 9.710690472292815e-20https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/694/425?format=asciiX-rayInfrareddefaultJ/ApJ/694/425/table2X-ray detections in L1251Bl_J-HLimit flag on J-Hmeta.code.error;phot.color;em.IR.JcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCXOCXO source number (<[S2009b] CXO NN> in Simbad)meta.id;meta.mainintRAJ2000Hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of declination (J2000)pos.eq.dec;meta.mainthetaOff-axis angle (1)arcmininstr.offsetfloat[S2006]? Corresponding XMM source number from Table 1 of Paper I (Simon T., 2006AJ....131..501S)meta.idintnullableoff? Angular offset between the position of each Chandra X-ray source and its XMM counterpartarcsecmeta.id.assoc;pos.angDistancefloatnullableRadRadius of extraction cell (2)arcsecphys.angSize;srcfloatTexpEffective exposure time (3)kstime.duration;obs.exposurefloatCR1? Background-corrected source count rate in the (0.3-10.0)keV energy band on August 10 (4)ct/ksphot.count;em.X-rayfloatnullablee_CR1? CR1 uncertaintyct/ksstat.errorfloatnullablef_CR1[h] Source detected in combined observation (5)meta.codecharCR2? Background-corrected source count rate in the (0.3-10.0)keV energy band on August 11 (4)ct/ksphot.count;em.X-rayfloatnullablee_CR2? CR2 uncertaintyct/ksstat.errorfloatnullable2MASS2MASS identification (JHHMMSSss+DDMMSSs)meta.id.crosscharf_2MASS[i] large offset from X-ray (6)meta.codecharKsmag? 2MASS Ks-band magnitude (7)magphot.mag;em.IR.KfloatnullableJ-H? 2MASS J-H color index (7)magphot.color;em.IR.J;em.IR.HfloatnullableH-Ks? 2MASS H-Ks color index (7)magphot.color;em.IR.H;em.IR.KfloatnullableSimbadNameSimbad column added by the CDSmeta.idcharONameIdentification(s)meta.idchar