Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/28403
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Kapanadze, B. | en_US |
dc.contributor.author | Dorner, D. | en_US |
dc.contributor.author | VERCELLONE, STEFANO | en_US |
dc.contributor.author | ROMANO, Patrizia | en_US |
dc.contributor.author | Hughes, P. | en_US |
dc.contributor.author | Aller, M. | en_US |
dc.contributor.author | Aller, H. | en_US |
dc.contributor.author | Reynolds, M. | en_US |
dc.contributor.author | Kapanadze, S. | en_US |
dc.contributor.author | Tabagari, L. | en_US |
dc.date.accessioned | 2020-11-17T17:49:37Z | - |
dc.date.available | 2020-11-17T17:49:37Z | - |
dc.date.issued | 2018 | en_US |
dc.identifier.issn | 0035-8711 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/28403 | - |
dc.description.abstract | The X-ray variability of the BL Lacertae source 1ES 1959+650 was studied intensively with X-ray telescope (XRT) onboard Swift during 2016 January-August. In this paper, we present the results obtained during this campaign. A long-term high X-ray state was superimposed by shorter-term flares by a factor of 1.9-4.7. We found 35 instances of intra-day variability which showed very fast flux changes by 14-21 per cent occurring within 1 ks and a decline by a factor of 2.3 in 17.2 ks. Similarly to the previous years, this period sometimes was characterized by a lack of correlated X-ray and TeV variability, indicating that the high-energy emission in 1ES 1959+650 was generated in the emission region more complex than a single zone. The source showed a significant X-ray - high-energy flux correlation, while the former was not correlated with the optical-UV fluxes. The best fits of the 0.3-10 keV spectra were mainly obtained using the log-parabola model. Strong spectral variability was detected, shifting the peak of the spectral energy distribution by more than 10 keV that happens rarely in blazars. During some strong short-term flares, the photon index at 1 keV frequently became harder than 1.70, and the spectral evolution was characterized by a harder-when-brighter behaviour. | en_US |
dc.language.iso | eng | en_US |
dc.title | The second strong X-ray flare and multifrequency variability of 1ES 1959+650 in 2016 January-August | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1093/mnras/stx2492 | en_US |
dc.identifier.scopus | 2-s2.0-85044328476 | en_US |
dc.identifier.isi | 000423731200078 | en_US |
dc.identifier.url | https://academic.oup.com/mnras/article/473/2/2542/4259577 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 473 | en_US |
dc.relation.issue | 2 | en_US |
dc.relation.firstpage | 2542 | en_US |
dc.relation.lastpage | 2564 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.international | sì | en_US |
dc.contributor.country | ITA | 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.473.2542K | en_US |
dc.relation.ercsector | ERC sectors::Physical Sciences and Engineering::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation::PE9_6 Stars and stellar systems | 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. Brera | - |
crisitem.author.dept | O.A. Brera | - |
crisitem.author.orcid | 0000-0003-1163-1396 | - |
crisitem.author.orcid | 0000-0003-0258-7469 | - |
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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Kapanadze_2018_MNRAS_473_2542.pdf | PDF editoriale | 3.34 MB | Adobe PDF | View/Open |
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