Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/32440
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Lobban, Andrew | en_US |
dc.contributor.author | Porquet, Delphine | en_US |
dc.contributor.author | Reeves, James | en_US |
dc.contributor.author | Markowitz, Alex | en_US |
dc.contributor.author | NARDINI, EMANUELE | en_US |
dc.contributor.author | Grosso, Nicolas | en_US |
dc.date.accessioned | 2022-06-21T14:34:52Z | - |
dc.date.available | 2022-06-21T14:34:52Z | - |
dc.date.issued | 2018 | en_US |
dc.identifier.issn | 0035-8711 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/32440 | - |
dc.description.abstract | We present the spectral/timing properties of the bare Seyfert galaxy Ark 120 through a deep ~420ks XMM-Newton campaign plus recent NuSTAR observations and a ~6-month Swift monitoring campaign. We investigate the spectral decomposition through fractional rms, covariance and difference spectra, finding the mid- to long-timescale (~day-year) variability to be dominated by a relatively smooth, steep component, peaking in the soft X-ray band. Additionally, we find evidence for variable FeK emission red-ward of the FeK-alpha core on long timescales, consistent with previous findings. We detect a clearly-defined power spectrum which we model with a power law with a slope of alpha ~ 1.9. By extending the power spectrum to lower frequencies through the inclusion of Swift and RXTE data, we find tentative evidence of a high-frequency break, consistent with existing scaling relations. We also explore frequency-dependent Fourier time lags, detecting a negative ('soft') lag for the first time in this source with the 0.3-1 keV band lagging behind the 1-4 keV band with a time delay of ~900s. Finally, we analyze the variability in the optical and UV bands using the Optical/UV Monitor on-board XMM-Newton and the UVOT on-board Swift and search for time-dependent correlations between the optical/UV/X-ray bands. We find tentative evidence for the U-band emission lagging behind the X-rays with a time delay of 2.4 +/- 1.8 days, which we discuss in the context of disc reprocessing. | en_US |
dc.language.iso | eng | en_US |
dc.title | A deep X-ray view of the bare AGN Ark 120. III. X-ray timing analysis and multiwavelength variability | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1093/mnras/stx2889 | en_US |
dc.identifier.scopus | 2-s2.0-85040245470 | en_US |
dc.identifier.isi | WOS:000424347900029 | en_US |
dc.identifier.url | https://academic.oup.com/mnras/article/474/3/3237/4604788 | en_US |
dc.identifier.url | http://arxiv.org/abs/1707.05536v2 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 474 | en_US |
dc.relation.issue | 3 | en_US |
dc.relation.firstpage | 3237 | en_US |
dc.relation.lastpage | 3258 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.international | sì | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2018MNRAS.474.3237L | en_US |
dc.description.apc | no | en_US |
dc.description.oa | 1 – prodotto con file in versione Open Access (allegare il file al passo 5-Carica) | en_US |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.openairetype | Article | - |
item.languageiso639-1 | en | - |
item.cerifentitytype | Publications | - |
item.grantfulltext | open | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | O.A. Arcetri | - |
crisitem.author.orcid | 0000-0001-9226-8992 | - |
crisitem.journal.journalissn | 0035-8711 | - |
crisitem.journal.ance | E112946 | - |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
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1707.05536.pdf | preprint | 2.31 MB | Adobe PDF | View/Open |
stx2889.pdf | Pdf editoriale | 4.34 MB | Adobe PDF | View/Open |
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