Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/27083
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Troja, E. | en_US |
dc.contributor.author | PIRO, LUIGI | en_US |
dc.contributor.author | Vasileiou, V. | en_US |
dc.contributor.author | Omodei, N. | en_US |
dc.contributor.author | Burgess, J. M. | en_US |
dc.contributor.author | Cutini, S. | en_US |
dc.contributor.author | Connaughton, V. | en_US |
dc.contributor.author | McEnery, J. E. | en_US |
dc.date.accessioned | 2020-09-03T10:14:10Z | - |
dc.date.available | 2020-09-03T10:14:10Z | - |
dc.date.issued | 2015 | en_US |
dc.identifier.issn | 0004-637X | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/27083 | - |
dc.description.abstract | Simultaneous Swift and Fermi observations of gamma-ray bursts (GRBs) offer a unique broadband view of their afterglow emission, spanning more than 10 decades in energy. We present the sample of X-ray flares observed by both Swift and Fermi during the first three years of Fermi operations. While bright in the X-ray band, X-ray flares are often undetected at lower (optical), and higher (MeV to GeV) energies. We show that this disfavors synchrotron self-Compton processes as the origin of the observed X-ray emission. We compare the broadband properties of X-ray flares with the standard late internal shock model, and find that in this scenario, X-ray flares can be produced by a late-time relativistic (Γ > 50) outflow at radii R ~ 10<SUP>13</SUP>-10<SUP>14</SUP> cm. This conclusion holds only if the variability timescale is significantly shorter than the observed flare duration, and implies that X-ray flares can directly probe the activity of the GRB central engine. | en_US |
dc.language.iso | eng | en_US |
dc.title | Swift and Fermi Observations of X-Ray Flares: The Case of Late Internal Shock | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1088/0004-637X/803/1/10 | en_US |
dc.identifier.scopus | 2-s2.0-84927591081 | en_US |
dc.identifier.isi | 000353015400010 | en_US |
dc.identifier.url | https://iopscience.iop.org/article/10.1088/0004-637X/803/1/10 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 803 | en_US |
dc.relation.issue | 1 | en_US |
dc.relation.firstpage | 10 | 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 | THE ASTROPHYSICAL JOURNAL | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2015ApJ...803...10T | 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 | IAPS Roma | - |
crisitem.author.orcid | 0000-0003-4159-3984 | - |
crisitem.journal.journalissn | 0004-637X | - |
crisitem.journal.ance | E016252 | - |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
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Troja_2015_ApJ_803_10.pdf | Pdf editoriale | 606.82 kB | Adobe PDF | View/Open |
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