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dc.contributor.authorMarinucci, A.-
dc.contributor.authorBianchi, S.-
dc.contributor.authorMatt, G.-
dc.contributor.authorAlexander, D. M.-
dc.contributor.authorBaloković, M.-
dc.contributor.authorBauer, F. E.-
dc.contributor.authorBrandt, W. N.-
dc.contributor.authorGandhi, P.-
dc.contributor.authorGuainazzi, M.-
dc.contributor.authorHarrison, F. A.-
dc.contributor.authorIwasawa, Kazushi-
dc.contributor.authorKoss, M.-
dc.contributor.authorMadsen, K. K.-
dc.contributor.authorNicastro, F.-
dc.contributor.authorPuccetti, S.-
dc.contributor.authorRicci, C.-
dc.contributor.authorStern, D.-
dc.contributor.authorWalton, D. J.-
dc.description.abstractWe present a NuSTAR and XMM-Newton monitoring campaign in 2014/2015 of the Comptonthick Seyfert 2 galaxy, NGC 1068. During the 2014 August observation, we detect with NuSTAR a flux excess above 20 keV (32 ± 6 per cent) with respect to the 2012 December observation and to a later observation performed in 2015 February. We do not detect any spectral variation below 10 keV in the XMM-Newton data. The transient excess can be explained by a temporary decrease of the column density of the obscuring material along the line of sight (from NH 1025 cm−2 to NH = 6.7 ± 1.0 × 1024 cm−2), which allows us for the first time to unveil the direct nuclear radiation of the buried active galactic nucleus in NGC 1068 and to infer an intrinsic 2-10 keV luminosity LX =7+7−4×1043 erg s−1.-
dc.format.extent1 p.-
dc.publisherRoyal Astronomical Society-
dc.relation.isformatofReproducció del document publicat a:
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society, 2016, vol. 456, num. 1, p. L94-L98-
dc.rights(c) Marinucci, A. et al., 2016-
dc.subject.classificationGalàxies actives-
dc.subject.classificationObservacions astronòmiques-
dc.subject.otherActive galaxies-
dc.subject.otherAstronomical observations-
dc.titleNuSTAR catches the unveiling nucleus of NGC 1068-
Appears in Collections:Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB))

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