BASS-XL: X-ray variability properties of unobscured active galactic nuclei

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dc.contributor.authorTortosa, Alessia
dc.contributor.authorRicci, Claudio
dc.contributor.authorArevalo, Patricia
dc.contributor.authorKoss, Michael J.
dc.contributor.authorBauer, Franz E.
dc.contributor.authorTrakhtenbrot, Benny
dc.contributor.authorMushotzky, Richard
dc.contributor.authorTemple, Matthew J.
dc.contributor.authorRicci, Federica
dc.contributor.authorLilayu, Alejandra Rojas
dc.contributor.authorKawamuro, Taiki
dc.contributor.authorCaglar, Turgay
dc.contributor.authorLiu, Tingting
dc.contributor.authorHarrison, Fiona
dc.contributor.authorOh, Kyuseok
dc.contributor.authorPowell, Meredith Clark
dc.contributor.authorStern, Daniel
dc.contributor.authorUrry, Claudia Megan
dc.date.accessioned2025-01-20T17:14:37Z
dc.date.available2025-01-20T17:14:37Z
dc.date.issued2023
dc.description.abstractWe investigate the X-ray variability properties of Seyfert 1 Galaxies belonging to the BAT AGN Spectroscopic Survey (BASS). The sample includes 151 unobscured (N-H < 10(22) cm(-2)) AGNs observed with XMM-Newton for a total exposure time of similar to 27 ms, representing the deepest variability study done so far with high signal-to-noise XMM-Newton observations, almost doubling the number of observations analysed in previous works. We constrain the relation between the normalized excess variance and the 2-10 keV AGN luminosities, black hole masses, and Eddington ratios. We find a highly significant correlation between sigma(2)(NXS) and M-BH, with a scatter of similar to 0.85 dex. For sources with high L2-10 this correlation has a lower normalization, confirming that more luminous (higher mass) AGNs show less variability. We explored the sigma(2)(NXS) versus M-BH relation for the sub-sample of sources with M-BH estimated via the 'reverberation mapping' technique, finding a tighter anticorrelation, with a scatter of similar to 0.65 dex. We examine how the sigma(2)(NXS) changes with energy by studying the relation between the variability in the hard (3-10 keV) and the soft (0.2-1 keV)/medium (1-3 keV) energy bands, finding that the spectral components dominating the hard energy band are more variable than the spectral components dominating in softer energy bands, on time-scales shorter than 10 ks.
dc.fuente.origenWOS
dc.identifier.doi10.1093/mnras/stad2775
dc.identifier.eissn1365-2966
dc.identifier.issn0035-8711
dc.identifier.urihttps://doi.org/10.1093/mnras/stad2775
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/91296
dc.identifier.wosidWOS:001078226700006
dc.issue.numero2
dc.language.isoen
dc.pagina.final1698
dc.pagina.inicio1687
dc.revistaMonthly notices of the royal astronomical society
dc.rightsacceso restringido
dc.subjectquasars: supermassive black hole
dc.subjectX-rays: galaxies
dc.subjectblack hole physics
dc.subjectgalaxies:nuclei
dc.titleBASS-XL: X-ray variability properties of unobscured active galactic nuclei
dc.typeartículo
dc.volumen526
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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