Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/27222
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Fernandez-Barral, A. | en_US |
dc.contributor.author | Blanch, O. | en_US |
dc.contributor.author | de Oña Wilhemi, E. | en_US |
dc.contributor.author | Galindo, D. | en_US |
dc.contributor.author | Herrera, J. | en_US |
dc.contributor.author | Ribó, M. | en_US |
dc.contributor.author | Rico, J. | en_US |
dc.contributor.author | STAMERRA, Antonio | en_US |
dc.contributor.author | Aharonian, F. | en_US |
dc.contributor.author | MAGIC Collaboration | en_US |
dc.contributor.author | Bosch-Ramon, V. | en_US |
dc.contributor.author | Zanin, R. | en_US |
dc.date.accessioned | 2020-09-08T13:38:27Z | - |
dc.date.available | 2020-09-08T13:38:27Z | - |
dc.date.issued | 2017 | en_US |
dc.identifier.issn | 1824-8039 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/27222 | - |
dc.description.abstract | Gamma-ray observations of microquasars at high and very-high energies can provide valuable information of the acceleration processes inside the jets, the jet-environment interaction and the disk-jet coupling. Two high-mass microquasars have been deeply studied to shed light on these aspects: Cygnus X-1 and Cygnus X-3. Both systems display the canonical hard and soft X-ray spectral states of black hole transients, where the radiation is dominated by non-thermal emission from the corona and jets and by thermal emission from the disk, respectively. Here, we report on the detection of Cygnus X-1 above 60 MeV using 7.5 yr of Pass8 Fermi-LAT data, correlated with the hard X-ray state. A hint of orbital flux modulation was also found, as the source is only detected in phases around the compact object superior conjunction. We conclude that the high-energy gamma-ray emission from Cygnus X-1 is most likely associated with jets and its detection allow us to constrain the production site. Moreover, we include in the discussion the final results of a MAGIC long-term campaign on Cygnus X-1 that reaches almost 100 hr of observations at different X-ray states. On the other hand, during summer 2016, Cygnus X-3 underwent a flaring activity period in radio and high-energy gamma rays, similar to the one that led to its detection in the high-energy regime in 2009. MAGIC performed comprehensive follow-up observations for a total of about 70 hr. We discuss our results in a multi-wavelength context. | en_US |
dc.language.iso | eng | en_US |
dc.title | Gamma rays from microquasars Cygnus X-1 and Cygnus X-3 | en_US |
dc.type | Conference paper | - |
dc.identifier.doi | 10.22323/1.301.0734 | en_US |
dc.identifier.url | https://pos.sissa.it/cgi-bin/reader/conf.cgi?confid=301 | en_US |
dc.identifier.url | https://pos.sissa.it/301/734/ | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 301 | en_US |
dc.relation.firstpage | 734 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.international | sì | en_US |
dc.relation.ispartofbook | 35th International Cosmic Ray Conference (ICRC2017) | en_US |
dc.relation.conferencename | 35th International Cosmic Ray Conference (ICRC2017) | en_US |
dc.relation.conferenceplace | Bexco, Busan, Korea | en_US |
dc.relation.conferencedate | 10-20 July, 2017 | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | POS PROCEEDINGS OF SCIENCE | en_US |
dc.type.miur | 273 Contributo in Atti di convegno | - |
dc.identifier.adsbibcode | 2017ICRC...35..734F | 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 | Conference paper | - |
item.languageiso639-1 | en | - |
item.fulltext | With Fulltext | - |
item.cerifentitytype | Publications | - |
item.grantfulltext | open | - |
crisitem.journal.journalissn | 1824-8039 | - |
crisitem.journal.ance | E188909 | - |
crisitem.author.dept | O.A. Roma | - |
crisitem.author.orcid | 0000-0002-9430-5264 | - |
Appears in Collections: | 3.01 Contributi in Atti di convegno |
Files in This Item:
File | Description | Size | Format | |
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ICRC2017_734.pdf | Pdf editoriale | 898.57 kB | Adobe PDF | View/Open |
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