Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/29076
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Mazzola, S. M. | en_US |
dc.contributor.author | Iaria, R. | en_US |
dc.contributor.author | Di Salvo, T. | en_US |
dc.contributor.author | DEL SANTO, MELANIA | en_US |
dc.contributor.author | SANNA, ALBERTO | en_US |
dc.contributor.author | Gambino, A. F. | en_US |
dc.contributor.author | Riggio, A. | en_US |
dc.contributor.author | SEGRETO, ALBERTO | en_US |
dc.contributor.author | Burderi, L. | en_US |
dc.contributor.author | Santangelo, A. | en_US |
dc.contributor.author | D'AMICO, NICOLO' | en_US |
dc.date.accessioned | 2020-12-22T09:18:44Z | - |
dc.date.available | 2020-12-22T09:18:44Z | - |
dc.date.issued | 2019 | en_US |
dc.identifier.issn | 0004-6361 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/29076 | - |
dc.description.abstract | Context. Most of the X-ray binary systems containing neutron stars classified as Atoll sources show two different spectral states, referred to as soft and hard. Moreover, a large number of these systems show a reflection component relativistically smeared in their spectra, which provides information on the innermost region of the system. <BR /> Aims: Our aim is to investigate the poorly studied broadband spectrum of the low-mass X-ray binary system 4U 1702-429, which was recently analysed combining XMM-Newton and INTEGRAL data. The peculiar value of the reflection fraction brought us to analyse further broadband spectra of 4U 1702-429. <BR /> Methods: We re-analysed the spectrum of the XMM-Newton/INTEGRAL observation of 4U 1702-429 in the 0.3-60 keV energy range and we extracted three 0.1-100 keV spectra of the source analysing three observations collected with the BeppoSAX satellite. <BR /> Results: We find that the XMM-Newton/INTEGRAL spectrum is well fitted using a model composed of a disc blackbody plus a Comptonised component and a smeared reflection component. We used the same spectral model for the BeppoSAX spectra, finding that the addition of a smeared reflection component is statistically significant. The best-fit values of the parameters are compatible to each other for the BeppoSAX spectra. We find that the reflection fraction is 0.05<SUB>-0.01</SUB><SUP>+0.3</SUP> for the XMM-Newton/INTEGRAL spectrum and between 0.15 and 0.4 for the BeppoSAX ones. <BR /> Conclusions: The relative reflection fraction and the ionisation parameter are incompatible between the XMM-Newton/INTEGRAL and the BeppoSAX observations and the characteristics of the Comptonising corona suggest that the source was in a soft state in the former observation and in a hard state in the latter. | en_US |
dc.language.iso | eng | en_US |
dc.title | A broadband spectral analysis of 4U 1702-429 using XMM-Newton and BeppoSAX data | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1051/0004-6361/201732383 | en_US |
dc.identifier.scopus | 2-s2.0-85060383428 | en_US |
dc.identifier.isi | 000455569900002 | en_US |
dc.identifier.url | https://www.aanda.org/articles/aa/full_html/2019/01/aa32383-17/aa32383-17.html | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 621 | en_US |
dc.relation.firstpage | A89 | 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 | ASTRONOMY & ASTROPHYSICS | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2019A&A...621A..89M | 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 | IASF Palermo | - |
crisitem.author.dept | IASF Palermo | - |
crisitem.author.orcid | 0000-0002-1793-1050 | - |
crisitem.author.orcid | 0000-0001-7341-6603 | - |
crisitem.journal.journalissn | 0004-6361 | - |
crisitem.journal.ance | E016240 | - |
Appears in Collections: | 1.01 Articoli in rivista |
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File | Description | Size | Format | |
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aa32383-17.pdf | PDF editoriale | 1.09 MB | Adobe PDF | View/Open |
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