J/A+A/689/A337ivo://CDS.VizieR/J/A+A/689/A337doi:10.26093/cds/vizier.36890337CDSLaurenti M.Tombesi F.Vagnetti F.Piconcelli E.Guainazzi M.,Vignali C.Paolillo M.Middei R.Bongiorno A.Zappacosta L.2025-02-24T20:01:10Z2024-09-24T10:47:35ZCDS support team

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

cds-question@unistra.fractive-galactic-nucleix-ray-sourcesgamma-ray-astronomyOur understanding of highly accreting AGNs is hampered by the lack of a complete systematic investigation in terms of their main spectral and variability properties, and by the relative paucity of them in the local Universe, especially those powered by supermassive black holes with M_BH_>10^8^M_{sun}_. To overcome this limitation, we present here the X-ray spectral analysis of a new, large sample of 61 highly accreting AGNs named as the XMM-Newton High-Eddington Serendipitous AGN Sample, or X-HESS, obtained by cross-correlating the 11th release of the XMM-Newton serendipitous catalogue and the catalogue of spectral properties of quasars from the SDSS DR14. The X-HESS AGNs are spread across wide intervals with a redshift of 0.06<z<3.3, a black hole mass of 6.8<log(M_BH_/M_{sun}_)<9.8, a bolometric luminosity of 44.7<logL_bol_[erg/s]<48.3, and an Eddington ratio of -0.2<log{lambda}_Edd_<0.5, and more than one third of these AGNs can rely on multiple observations at different epochs, allowing us to investigate also their variability. We find a large scatter in the GAMMA-{lambda}_Edd_ distribution of the highly accreting X-HESS AGNs. A significant correlation is only found by considering a sample of lower-{lambda}_Edd_ AGNs with {lambda}_Edd_<=0.3. The GAMMA-{lambda}_Edd_ relation appears to be more statistically sound for AGNs with lower M_BH_ and/or L_bol_. We investigate the possibility of transforming the GAMMA-{lambda}_Edd_ plane into a fully epoch-dependent frame by calculating the Eddington ratio from the simultaneous optical/UV data from the optical monitor, {lambda}_Edd,O_/UV. Finally, we also get a mild indication of a possible anti-correlation between Gamma and the strength of the soft excess.2024A&A...689A.337Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/689/A337CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/xmm : XMM-Newton Observation Log (XMM-Newton Science Operation Center, 2012-)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/689/A337https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/689/A337http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/689/A337https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/689/A337https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/689/A337http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/689/A337GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/689/A337/tablea1 (X-HESS AGNs and their general properties)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/689/A337/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/689/A337/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/689/A337/tablea1?GETtext/xml+votable180.050000true146.549.870.0055555555555555566/4352 4698 4850 4859 4993 5112 5262 5529 5536 5671 5857 6539 7168 7241 7606 8906 9018 9457 9476 9855 9959 10182 10401 10940 11217 11953 17511 17686 17699 17716 17746 17799 17859 18099 18302 18788 19033 19036 19416 19717 23076 25936 26197 26331 26475 26483 26990 27097 27102 27291 27483 27717 27867 28148 28371 28535 28548 28555 31717 36786https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/689/A337?format=asciiGamma-rayX-raydefaultJ/A+A/689/A337/tablea1X-HESS AGNs and their general propertiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDSource identifier in the X-HESS samplemeta.id;meta.mainintSDSSSDSS source name (JHHMMSS.ss+DDMMSS.s)meta.idcharRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainNHgalGalactic column density1e+24m**-2phys.columnDensity;pos.galacticfloatE(B-V)intInternal reddeningphot.color.excesscharSimbadSimbad column added by the CDSmeta.ref.urlcharzRedshiftsrc.redshiftfloatlogMBHBlack hole masslog(solMass)phys.massfloatlogLbolBolometric luminositylog(1e-07W)phys.luminosityfloatlambdaEddEddington ratiophys.luminosity;arith.ratiofloatNepochNumber of available epochsmeta.numberintJ/A+A/689/A337/tableb1Journal of observationsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDSource identifier in the X-HESS samplemeta.id;meta.mainintObsNoObservation numbermeta.idintObsIDXMM-Newton observation IDmeta.id;obsStartDateStart date of the observation (yyyy-mm-dd)time.start;obsnullableExppn? Net exposure for the EPIC pn camerakstime.expofloatnullableExpMOS1? Net exposure for the EPIC MOS1 camerakstime.expofloatnullableExpMOS2? Net exposure for the EPIC MOS2 camerakstime.expofloatnullableCtstotpn? Net counts for the EPIC pn camera in the E=0.3-10keV bandctphot.count;em.X-rayintnullableCtstotMOS1? Net counts for the EPIC MOS1 camera in the E=0.3-10keV bandctphot.count;em.X-rayintnullableCtstotMOS2? Net counts for the EPIC MOS2 camera in the E=0.3-10keV bandctphot.count;em.X-rayintnullableJ/A+A/689/A337/tablec1Best fitting spectral parameters and derived quantitiesE_aox? Positive error on alpha_ox_stat.error;stat.maxfloatnullablelogLEddOUV? Eddington ratio from the simultaneous optical/UV dataphys.luminosity;arith.ratiofloatnullableRsp? Proxy of the relative strength of the soft excessstat.fit.paramfloatnullablee_Rsp? Negative error on Rspstat.errorfloatnullableE_Rsp? Positive error on Rspstat.error;stat.maxfloatnullableE_FhardPositive error on Fhardlog(1e-17W.m**-2)stat.error;stat.maxfloatlogLsoftIntrinsic luminosity in the soft E=0.5-2keV bandlog(1e-07W)phys.luminosity;em.X-rayfloate_logLsoftNegative error on logLsoftlog(1e-07W)stat.errorfloatE_logLsoftPositive error on logLsoftlog(1e-07W)stat.error;stat.maxfloataox? alpha_ox_ spectral indexspect.indexfloatnullablee_aox? Negative error on alpha_ox_stat.errorfloatnullableE_logLhardPositive error on logLhardlog(1e-07W)stat.error;stat.maxfloatkXX-ray bolometric correctionphot.mag.bcfloate_kXNegative error on kXstat.errorfloatE_kXPositive error on kXstat.error;stat.maxfloatlogLXMonochromatic luminosity at E=2keV rest-framelog(1e-07W.Hz**-1)phys.luminosityfloate_logLXNegative error on logLXlog(1e-07W.Hz**-1)stat.errorfloatE_logLXPositive error on logLXlog(1e-07W.Hz**-1)stat.error;stat.maxfloatlogLUV? Monochromatic luminosity at {lambda}=2500{AA} rest-framelog(1e-07W.Hz**-1)phys.luminosityfloatnullablee_logLUV? Negative error on logLUVlog(1e-07W.Hz**-1)stat.errorfloatnullableE_logLUV? Positive error on logLUVlog(1e-07W.Hz**-1)stat.error;stat.maxfloatnullablelogLO? Monochromatic luminosity at {lambda}=4400{AA} rest-framelog(1e-07W.Hz**-1)phys.luminosityfloatnullablee_logLO? Negative error on logLOlog(1e-07W.Hz**-1)stat.errorfloatnullableE_logLO? Positive error on logLOlog(1e-07W.Hz**-1)stat.error;stat.maxfloatnullableObsNoObservation numbermeta.idintFhardAbsorbed flux in the hard E=2-10keV bandlog(1e-17W.m**-2)phot.flux;em.X-ray.mediumfloate_FhardNegative error on Fhardlog(1e-17W.m**-2)stat.errorfloatlogLhardIntrinsic luminosity in the hard E=2-10keV bandlog(1e-07W)phys.luminosity;em.X-rayfloate_logLhardNegative error on logLhardlog(1e-07W)stat.errorfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDSource identifier in the X-HESS samplemeta.id;meta.mainintModelBest-fit modelstat.param;meta.modelledcharW/dofRatio between W-stat and the degrees of freedom (dof)stat.fit.omcfloatdofDegrees of freedomstat.fit.dofintGammaPhoton indexmeta.code;spect.indexfloate_GammaNegative error on photon indexstat.errorfloatE_GammaPositive error on photon indexstat.error;stat.maxfloatkT? Blackbody temperaturelog(eV)phys.temperaturefloatnullablee_kT? Negative error on kTlog(eV)stat.error;phys.energyfloatnullableE_kT? Positive error on kTlog(eV)stat.error;stat.maxfloatnullableFsoftAbsorbed flux in the soft E=0.5-2keV bandlog(1e-17W.m**-2)phot.flux;em.X-ray.softfloate_FsoftNegative error on Fsoftlog(1e-17W.m**-2)stat.errorfloatE_FsoftPositive error on Fsoftlog(1e-17W.m**-2)stat.error;stat.maxfloat