J/PASJ/57/135ivo://CDS.VizieR/J/PASJ/57/135doi:10.26093/cds/vizier/bj-1s-47CDSInui T.Matsumoto H.Tsuru T.G.Koyama K.Matsushita S.Peck A.B.,Tarchi A.2026-03-17T20:04:34Z2006-09-13T04:55:04ZCDS support team

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

cds-question@unistra.fractive-galactic-nucleix-ray-sourcesWe present six monitoring observations of the starburst galaxy NGC 2146 using the Chandra X-ray Observatory. We detected 67 point sources in the field of view of the ACIS-S detector. Six of these sources were Ultra-Luminous X-ray Sources, the brightest of which had a luminosity of 5x10^39^erg/s. One of them, with a luminosity of ~1x10^39^erg/s, is coincident with the dynamical center location, which may be a low-luminosity active galactic nucleus. We have produced a table where the positions and main characteristics of the detected sources are reported. A comparison between the positions of the X-ray sources and those detected in NIR or radio indicates no definite counterpart. We have derived a logN-logS relation and a luminosity function. The luminosity function has a slope of 0.71 above a detection limit, which is similar to those found in other starburst galaxies. Diffuse emissions were detected in both soft (0.5-2.0keV) and hard (2.0-10.0keV) energy bands. The spectra of the diffuse component were fitted with two (hard and soft) components. The hard power-law component, with a luminosity of ~4x10^39^erg/s, is likely to have originated by unresolved point sources.2005PASJ...57..135Ihttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/PASJ/57/135CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/chandra : The Chandra Archive Log (CXC, 1999-)J/ApJS/157/59 : Ultraluminous X-ray sources in nearby galaxies (Liu+, 2005)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/PASJ/57/135https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/PASJ/57/135http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/PASJ/57/135https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/PASJ/57/135https://vizier.iucaa.in/viz-bin/votable?-source=J/PASJ/57/135http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/PASJ/57/135GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/PASJ/57/135/table8 (Main Chandra Point Source Catalog)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/PASJ/57/135/table8?https://vizier.iucaa.in/viz-bin/conesearch/J/PASJ/57/135/table8?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/PASJ/57/135/table8?GETtext/xml+votable180.050000true94.34037578.37258330.0055555555555555566/8106-8107https://cdsarc.cds.unistra.fr/viz-bin/moc/J/PASJ/57/135?format=asciiX-raydefaultJ/PASJ/57/135/table8Main Chandra Point Source CatalogrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[IMT2005]Sequential numbermeta.recordintRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainNCtNet photon counts with background substractedctphot.count;em.X-rayfloate_NCtrms uncertainty on NCtctstat.errorfloatSigniSignificancestat.fit.goodnessfloatVTimeTime variability given with the chi^2^ teststat.fit.goodness;src.varfloatHR? Hardness ratio (H-S)/(H+S) (H:2-10keV, S:0.5-2keV)phot.flux;arith.ratiofloatnullablen_HR[c] Note on HR (1)meta.notecharHRl? Lower limit of hardness ratio interval (90% confidence)phot.flux;arith.ratiofloatnullableHRu? Upper limit of hardness ratio interval (90% confidence)phot.flux;arith.ratiofloatnullableNH? Absorption column density1e-22cm**-2phys.columnDensityfloatnullablen_NH[b] Note on NH (1)meta.notecharNHl? Lower limit of NH interval (90% confidence)1e-22cm**-2phys.columnDensityfloatnullableNHu? Upper limit of NH interval (90% confidence)1e-22cm**-2phys.columnDensityfloatnullableGamma? Photon-indexspect.indexfloatnullablen_Gamma[a] Note on Gamma (1)meta.notecharGammal? Lower limit of Gamma interval (90% confidence)spect.indexfloatnullableGammau? Upper limit of Gamma interval (90% confidence)spect.indexfloatnullableFhardObserved flux in the hard 2-10keV band1e-17W.m**-2phot.flux;em.X-rayfloatFtotObserved flux in the total 0.5-10keV band1e-17W.m**-2phot.flux;em.X-rayfloatlogLhardX-ray luminosity in the hard 2-10keV bandlog(1e-07W)phys.luminosity;em.X-rayfloatlogLtotX-ray luminosity in the total 0.5-10keV bandlog(1e-07W)phys.luminosity;em.X-rayfloat