Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/20.500.12386/29551
Campo DC | Valore | Lingua |
---|---|---|
dc.contributor.author | Munar-Adrover, Pere | en_US |
dc.contributor.author | Sabatini, S. | en_US |
dc.contributor.author | PIANO, Giovanni | en_US |
dc.contributor.author | TAVANI, MARCO | en_US |
dc.contributor.author | Nguyen, L. H. | en_US |
dc.contributor.author | LUCARELLI, Fabrizio | en_US |
dc.contributor.author | VERRECCHIA, Francesco | en_US |
dc.contributor.author | PITTORI, Carlotta | en_US |
dc.date.accessioned | 2021-01-07T13:40:24Z | - |
dc.date.available | 2021-01-07T13:40:24Z | - |
dc.date.issued | 2016 | en_US |
dc.identifier.issn | 0004-637X | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/29551 | - |
dc.description.abstract | AGILE discovered the transient source AGL J2241+4454 in 2010, which triggered the study of the associated field allowing for the discovery of the first Be/black hole binary system: MWC 656. This binary was suggested to be the counterpart of AGL J2241+4454, but this association is still not robust. In this work we explore the archival AGILE and Fermi/Large Area Telescope (LAT) data to find more transient events compatible with AGL J2241+4454 and address the possibility to link them to the accretion/ejection processes of MWC 656. We found a total of nine other transient events with AGILE compatible with the position of AGL J2241+4454, besides the 2010 one. We folded these events with the period of the binary system and we could not associate the gamma-ray activity with any particular orbital phase. By stacking the 10 transient events we obtained a spectrum that extends between 100 MeV and 1 GeV, and we fitted it with a power law with a photon index Γ = 2.3 +/- 0.2. We searched the Fermi/LAT data in order to complement the gamma-ray information provided by AGILE but no significant results arose. To investigate this apparent contradiction between these telescopes, we studied the exposure of the field of AGL J2241+4454 in both instruments, and found significant differences. In particular, AGILE exposed, for a longer time and at a lower off-axis angular distance, the field of AGL J2241+4454. This fact, together with the energy-dependent sensitivity of both instruments, and the soft spectrum found in the stacking analysis, might explain why AGILE observed the transient events not seen by Fermi/LAT. | en_US |
dc.language.iso | eng | en_US |
dc.title | The Gamma-Ray Source AGL J2241+4454 as the Possible Counterpart of MWC 656 | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.3847/0004-637X/829/2/101 | en_US |
dc.identifier.scopus | 2-s2.0-84990922602 | en_US |
dc.identifier.isi | 000385377200043 | en_US |
dc.identifier.url | https://iopscience.iop.org/article/10.3847/0004-637X/829/2/101 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 829 | en_US |
dc.relation.issue | 2 | en_US |
dc.relation.numberofpages | 8 | en_US |
dc.relation.article | id. 101 | en_US |
dc.type.referee | REF_1 | 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 | 2016ApJ...829..101M | en_US |
dc.description.apc | sì | 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.dept | IAPS Roma | - |
crisitem.author.dept | O.A. Roma | - |
crisitem.author.dept | O.A. Roma | - |
crisitem.author.dept | O.A. Roma | - |
crisitem.author.orcid | 0000-0002-9332-5319 | - |
crisitem.author.orcid | 0000-0003-2893-1459 | - |
crisitem.author.orcid | 0000-0002-6311-764X | - |
crisitem.author.orcid | 0000-0003-3455-5082 | - |
crisitem.author.orcid | 0000-0001-6661-9779 | - |
crisitem.journal.journalissn | 0004-637X | - |
crisitem.journal.ance | E016252 | - |
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