J/ApJ/835/223ivo://CDS.VizieR/J/ApJ/835/223doi:10.26093/cds/vizier.18350223CDSShe R.Ho L.C.Feng H.2017-10-31T12:00:15Z2017-09-22T07:30:12ZCDS support team

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

cds-question@unistra.fractive-galactic-nucleix-ray-sourcesgalaxy-kinematicsWe searched the public archive of the Chandra X-ray Observatory as of 2016 March and assembled a sample of 719 galaxies within 50Mpc with available Advanced CCD Imaging Spectrometer observations. By cross-correlation with the optical or near-infrared nuclei of these galaxies, 314 of them are identified to have an X-ray active galactic nucleus (AGN). The majority of them are low-luminosity AGNs and are unlikely X-ray binaries based upon their spatial distribution and luminosity functions. The AGN fraction is around 60% for elliptical galaxies and early-type spirals, but drops to roughly 20% for Sc and later types, consistent with previous findings in the optical. However, the X-ray survey is more powerful in finding weak AGNs, especially from regions with active star formation that may mask the optical AGN signature. For example, 31% of the H II nuclei are found to harbor an X-ray AGN. For most objects, a single power-law model subject to interstellar absorption is adequate to fit the spectrum, and the typical photon index is found to be around 1.8. For galaxies with a non-detection, their stacked Chandra image shows an X-ray excess with a luminosity of a few times 10^37^erg/s on average around the nuclear region, possibly composed of faint X-ray binaries. This paper reports on the technique and results of the survey; in-depth analysis and discussion of the results will be reported in forthcoming papers.2017ApJ...835..223Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/835/223CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/chandra : The Chandra Archive Log (CXC, 1999-2014)VII/141 : Spectrophotometric Atlas of Galaxies (Kennicutt Jr. 1992)VIII/76 : Leiden/Argentine/Bonn (LAB) Survey of Galactic HI (Kalberla+ 2005)VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)VII/259 : 6dF galaxy survey final redshift release (Jones+, 2009)VII/258 : Quasars and Active Galactic Nuclei (13th Ed.) (Veron+ 2010)J/ApJS/112/315 : Spectroscopic parameters of Seyfert nuclei (Ho+ 1997)J/PASP/111/438 : Updated Zwicky catalog (UZC) (Falco+, 1999)J/ApJ/632/799 : NGC4395 light curves (Peterson+, 2005)J/MNRAS/366/480 : Emission-line properties of Seyfert 2 nuclei (Gu+, 2006)J/ApJS/164/81 : Spectrophotometry of nearby galaxies (Moustakas+, 2006)J/ApJ/670/92 : New sample of low-mass black holes in AGN (Greene+, 2007)J/A+A/495/421 : AGN in XMM-Newton archive (CAIXA) (Bianchi+, 2009)J/MNRAS/398/1165 : AGN in nearby galaxies (Goulding+, 2009)J/ApJS/183/1 : Catalog of central stellar velocity dispersions (Ho+, 2009)J/ApJ/714/25 : AMUSE-Virgo survey. II. (Gallo+, 2010)J/MNRAS/413/971 : Galaxy And Mass Assembly (GAMA) DR1 (Driver+, 2011)J/ApJ/755/167 : Low-mass black holes in SDSS Seyfert 1 gal. (Dong+, 2012)J/ApJ/826/L32 : Black hole masses in megamaser disk galaxies (Greene+, 2016)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/835/223https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/835/223http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/835/223https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/835/223https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/835/223http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/835/223GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/835/223/xgal (General and X-ray properties for galaxies in our (tables 1 and 2))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/835/223/xgal?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/835/223/xgal?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/835/223/xgal?GETtext/xml+votable180.050000true54.8054167-35.37144440.0055555555555555565/6935 6941 6978 6979 6984 6986 6/602 764 816 2121 2155 2320 2324 2333 2372 2374 2380 2383 2409 2432 2622 2687 2709 3042 3078 3278 3299 3304 3389 3438 3506 3824 3910 3968 4178 4182 4410 4439 4447 4511 4948 5061 5067 5075 5124 5142 5174 5182 5196 5202 5241 5283 5429 5463 5469 5482 5492 5504 5572 5587 5589 5590 5591 5598 5599 5628 5635 5636 5715 5751 5793 5799 5966 5967 5975 5976 5980 5982 5989 5995 5999 6001 6014 6034 6042 6046 6047 6048 6090 6093 6103 6619 6623 6649 6773 7036 7225 7241 7281 7303 7385 7424 7498 7584 7602 7604 7606 7607 7624 7658 7743 7769 7941 7946 7957 7970 7986 7997 8028 8106 8173 8193 8195 8196 8225 8492 8495 8526 8908 9190 10183 10348 10364 10454 10456 10475 10512 10551 10637 10650 10689 10761 10762 10769 10817 10841 10847 10856 10888 10900 10901 10905 10911 10912 10924 10925 10927 10930 10941 10970 10977 10979 10986 10991 11000 11006 11026 11027 11030 11127 11180 11246 11262 11263 11375 11434 11446 11448 11457 11639 11681 11691 11791 11874 11933 11961 12007 12018 12019 12025 13162 13401 13511 13522 13672 14777 15068 15161 15592 16098 16120 16441 16595 16605 16655 16701 16886 16898 17286 17472 17492 17535 17594 17598 17612 17754 17755 17773 17780 18041 18071 18209 18212 18241 18269 18325 18387 18398 18809 18858 18895 18935 19125 19611 19625 19678 19697 20000 20014 20270 20400 20424 20601 20720 20725 20745 20875 21155 21450 22746 22751 22826 22830 22944 23113 23160 23296 23566 24733 24839 24912 24913 24920 24949 24951 25083 25100 25172 25205 25344 25599 25603 25610 25647 25705 25742 25768 25790 25888 25890 25907 25916 25935 25960 25972 26055 26065 26125 26135 26161 26175 26217 26234 26260 26264 26265 26303 26309 26313 26316 26317 26330 26331 26336 26338 26361 26362 26365 26472 26542 26803 26858 27030 27079 27106 27426 27458 27512 27514 27515 27518 27591 27604 27643 27652 27654 27669 27713 27714 27718 27719 27721 27722 27723 27724 27728 27730 27731 27733 27734 27735 27736 27738 27739 27750 27756 27757 27763 27769 27771 27773 27774 27853 27857 27859 27861 27862 27884 27904 27906 27907 27908 27910 27931 27942 27943 27948 27951 27960 28015 28032 28033 28035 28037 28038 28039 28044 28045 28054 28077 28123 28126 28141 28142 28147 28149 28167 28172 28173 28184 28200 28221 28300 28304 28311 28468 28486 28491 28495 28496 28498 28511 28516 28517 28521 28524 28529 28535 28538 28608 28612 28631 29718 30970 31453 31469 32482 33176 33193 33271 33295 33337 33795 33835 33920 33954 33986 34273 34334 34361 34471 34493 34495 34531 34533 34534 34535 34540 34641 34910 35243 35499 35514 35536 35691 35720 35746 35928 35993 36081 36107 36131 36152 36153 36156 36194 36231 36236 36241 36243 36247 36258 36261 36377 36621 36623 36773 36785 36793 36974 37429 37560 38347 38390 38655 38657 38682 38703 38704 38842 38853 38872 39043 39836 39982 40124 40252 40321 40328 40410 40456 41423 41586 42016 42025 43233 43257 43262 43326 43339 43420 43619 43626 43627 43809 43874 43876 43881 43925 44026 44660 44718 44947 45491 45732 45748 45914 46036 46164 46175 46399 46438 46442 46477 46479 46491 46549 46568 46608 46987 46999 47047 47386 47397 48035 48270https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/835/223?format=asciiX-raydefaultJ/ApJ/835/223/table4Fitting results of galaxiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[10/698] Source sequence numbermeta.idintNameObject Namemeta.id;meta.maincharModelBest fit model (1)stat.param;meta.modelledcharNorm1[-6.1/-2.3]? Log normalization of power-law component; in photons/keV/cm^2^/s unitsstat.fit.paramfloatnullablelogL1[36/43]? Log of 0.3-10keV luminosity of power-law component; in erg/slog(1e-07W)phys.luminosity;em.X-rayfloatnullableNorm2[-6.5/-3.7]? Log normalization of 2nd component (2)stat.fit.paramfloatnullablelogL2[36/41]? Log of 0.3-10keV luminosity of 2nd component; in erg/slog(1e-07W)phys.luminosity;em.X-rayfloatnullableNH[0.02/430]? Extragalactic absorption column density1e+22cm**-2phys.columnDensityfloatnullableb_NH? Lower limit in NH1e+22cm**-2phys.columnDensity;stat.minfloatnullableB_NH? Upper limit in NH1e+22cm**-2phys.columnDensity;stat.maxfloatnullableGamma[0.5/4.3]? Power-law photon indexmeta.code;spect.indexfloatnullableb_Gamma? Lower limit in Gamma (3)meta.notefloatnullableB_Gamma? Upper limit in Gamma (3)meta.notefloatnullableTemp[0.02/1.1]? Temperature of mekal or blackbodykeVphys.temperaturefloatnullableb_Temp? Lower limit in TempkeVphys.temperature;stat.minfloatnullableB_Temp? Upper limit in TempkeVphys.temperature;stat.maxfloatnullableChi2[0.1/655]? Chi-squarestat.fit.chi2floatnullableDOF[2/493]? Degree of freedomstat.fit.dofintnullableRefNote on spectral fitting or reference for pileup sources (G1)spect.indexcharJ/ApJ/835/223/xgalGeneral and X-ray properties for galaxies in our (tables 1 and 2)SimbadNameSimbad column added by the CDSmeta.idchare_H1? Error of H1stat.errorfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqRunning sequence numbermeta.idintNameObject Namemeta.id;meta.maincharprimaryFDisplay the fitting results for this galaxy (table 4)meta.ref.urlcharDist[0.02/50] Distance from NEDMpcpos.distance;pos.heliocentricfloatRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainClassNuclear spectral classification (1)spect.indexcharHTypeHubble Type from NEDmeta.note;src.morph.typecharSigma[17/414]? Central velocity dispersion (2)km/sphys.veloc.dispersionfloatnullablee_Sigma[1/41]? Error in sigmakm/sstat.errorfloatnullablelogLHa[34.9/41.6]? Log of Halpha luminosity (3)log(1e-07W)phys.luminosity;em.line.Halphafloatnullablen_logLHaNote(s) on logLHa (4)meta.notecharlogMBH[2/10]? Log of Black Hole mass (5)log(solMass)phys.massfloatnullableb_logMBH[1/10]? Lower limit of logMBHlog(solMass)phys.mass;stat.minfloatnullableB_logMBH[3/11]? Upper limit of logMBHlog(solMass)phys.mass;stat.maxfloatnullableNH0[0.004/0.8] Galactic absorption column density1e-22cm**-2phys.columnDensityfloatHCatDisplay data from Ho+, 1997, J/ApJS/112/315 and 2009, J/ApJS/183/1, within 10"meta.ref.urlintnullableNEDNED column added by the CDSmeta.ref.urlcharObsIDChandra Observation identifiermeta.id;obs.param;obsintInstInstrument used in Chandra observation ("ACIS-S", 623 occurrences or "ACIS-I")instr.setup;obscharExp[1/190] Exposure of the observationksobs.param;obsfloatSep[0.05/2.7]? Offset between X-ray source and galaxy centerarcsecpos.angDistancefloatnullableAGNAGN flag: "Y"=yes (314 occurrences) or "N"=Nometa.code.classcharH0[-1/1]? Hardness ratio H0: (hard-soft-medium)/full (1)phot.flux;arith.ratiofloatnullablee_H0[0.001/0.4]? Error of H0stat.errorfloatnullableH1[-0.7/0.8]? Hardness ratio H1: (medium-soft)/full (1)phot.flux;arith.ratiofloatnullableH2[-0.6/1]? Hardness ratio H2: (hard-medium)/full (1)phot.flux;arith.ratiofloatnullablee_H2? Error of H2stat.errorfloatnullableNH[0.3/9.1]? Intrinsic absorption inferred from hardness ratio1e+22cm**-2phys.columnDensityfloatnullableb_NH[0.01/8]? Lower limit in NH1e+22cm**-2phys.columnDensity;stat.minfloatnullableB_NH[0.01/27]? Upper limit in NH1e+22cm**-2phys.columnDensity;stat.maxfloatnullableFlux[0.08/17100]? Observed flux in 2-10keV1e-17W.m**-2phot.flux;em.X-raydoublenullableb_Flux[0/16800]? Lower limit in Flux1e-17W.m**-2phot.flux;stat.mindoublenullableB_Flux[0.01/17400]? Upper limit in Flux1e-17W.m**-2phot.flux;stat.maxdoublenullablelogLX[35/44]? Log of 2-10keV luminosity; in erg/slog(1e-07W)phys.luminosity;em.X-rayfloatnullableb_logLX[35/43]? Lower limit in LogLXlog(1e-07W)phys.luminosity;em.X-ray;stat.minfloatnullableB_logLX[30/43]? Upper limit in LogLXlog(1e-07W)phys.luminosity;em.X-ray;stat.maxfloatnullablen_logLXNote on luminosity or references for sources suffering from pileup (G1)meta.notechar