J/A+A/629/A54ivo://CDS.VizieR/J/A+A/629/A54doi:10.26093/cds/vizier.36290054CDSUrsini F.Bassani L.Malizia A.Bazzano A.Bird A.J.Stephen J.B.,Ubertini P.2025-12-05T20:00:43Z2019-09-04T07:04:42ZCDS support team

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

cds-question@unistra.frseyfert-galaxiesx-ray-sourcesWe aim to measure the physical properties of the hot X-ray corona of two active galactic nuclei, NGC 4388 and NGC 2110. We analysed the hard X-ray (20-300keV) INTEGRAL spectrum in conjunction with archival XMM-Newton and NuSTAR data. The X-ray spectrum of both sources is phenomenologically well described by an absorbed cut-off power law. In agreement with previous results, we find no evidence of a Compton reflection component in these sources. We obtain a high-energy cut-off of 200_-40_^+75^keV for NGC 4388 and 320_-60_^+100^keV for NGC 2110. A fit with a thermal Comptonisation model yields a coronal temperature of 80_-20_^+40^keV and 75_-15_^+20^keV, respectively, and an optical depth of approximately two, assuming a spherical geometry. The coronal temperature and luminosity of both sources are consistent with pair production that acts as a thermostat for the thermal plasma. These results emphasise the importance of good signal-to-noise X-ray data above 100keV to probe the high-energy emission of AGNs.2019A&A...629A..54Uhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/629/A54CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/629/A54https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/629/A54http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/629/A54https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/629/A54https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/629/A54http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/629/A54GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/629/A54/list (List of fits files)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/629/A54/list?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/629/A54/list?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/629/A54/list?GETtext/xml+votable180.050000true6/21450 27767https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/629/A54?format=asciiX-raydefaultJ/A+A/629/A54/listList of fits filesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameName (NGC 2110 or NGC 4388)meta.id;meta.maincharObs.datObservation datetime.epoch;obsnullableInstInstrument (INTEGRAL, XMM-Newton or NuSTAR)meta.id;instrcharSizeSize of FITS filebytephys.size;meta.fitsintFileNameName of FITS file, in subdirectory fitsmeta.id;meta.fitscharTitleTitle of the FITS filemeta.title;meta.fitscharSimbadSimbad column added by the CDSmeta.ref.urlchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.mainnullable_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainnullable