Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/20.500.12386/29614
Campo DC | Valore | Lingua |
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dc.contributor.author | Bartoli, B. | en_US |
dc.contributor.author | Bernardini, P. | en_US |
dc.contributor.author | Bi, X. J. | en_US |
dc.contributor.author | Cao, Z. | en_US |
dc.contributor.author | Catalanotti, S. | en_US |
dc.contributor.author | Chen, S. Z. | en_US |
dc.contributor.author | Chen, T. L. | en_US |
dc.contributor.author | Cui, S. W. | en_US |
dc.contributor.author | Dai, B. Z. | en_US |
dc.contributor.author | D'Amone, A. | en_US |
dc.contributor.author | Danzengluobu | en_US |
dc.contributor.author | De Mitri, I. | en_US |
dc.contributor.author | D'Ettorre Piazzoli, B. | en_US |
dc.contributor.author | Di Girolamo, T. | en_US |
dc.contributor.author | Di Sciascio, G. | en_US |
dc.contributor.author | Feng, C. F. | en_US |
dc.contributor.author | Feng, Zhaoyang | en_US |
dc.contributor.author | Feng, Zhenyong | en_US |
dc.contributor.author | Gou, Q. B. | en_US |
dc.contributor.author | Guo, Y. Q. | en_US |
dc.contributor.author | He, H. H. | en_US |
dc.contributor.author | Hu, Haibing | en_US |
dc.contributor.author | Hu, Hongbo | en_US |
dc.contributor.author | Iacovacci, M. | en_US |
dc.contributor.author | Iuppa, R. | en_US |
dc.contributor.author | Jia, H. Y. | en_US |
dc.contributor.author | Labaciren | en_US |
dc.contributor.author | Li, H. J. | en_US |
dc.contributor.author | Liu, C. | en_US |
dc.contributor.author | Liu, J. | en_US |
dc.contributor.author | Liu, M. Y. | en_US |
dc.contributor.author | Lu, H. | en_US |
dc.contributor.author | Ma, L. L. | en_US |
dc.contributor.author | Ma, X. H. | en_US |
dc.contributor.author | Mancarella, G. | en_US |
dc.contributor.author | Mari, S. M. | en_US |
dc.contributor.author | Marsella, G. | en_US |
dc.contributor.author | Mastroianni, S. | en_US |
dc.contributor.author | Montini, P. | en_US |
dc.contributor.author | Ning, C. C. | en_US |
dc.contributor.author | Perrone, L. | en_US |
dc.contributor.author | Pistilli, P. | en_US |
dc.contributor.author | Salvini, P. | en_US |
dc.contributor.author | Santonico, R. | en_US |
dc.contributor.author | Shen, P. R. | en_US |
dc.contributor.author | Sheng, X. D. | en_US |
dc.contributor.author | Shi, F. | en_US |
dc.contributor.author | Surdo, A. | en_US |
dc.contributor.author | Tan, Y. H. | en_US |
dc.contributor.author | VALLANIA, PIERO | en_US |
dc.contributor.author | VERNETTO, Silvia Teresa | en_US |
dc.contributor.author | Vigorito, C. | en_US |
dc.contributor.author | Wang, H. | en_US |
dc.contributor.author | Wu, C. Y. | en_US |
dc.contributor.author | Wu, H. R. | en_US |
dc.contributor.author | Xue, L. | en_US |
dc.contributor.author | Yang, Q. Y. | en_US |
dc.contributor.author | Yang, X. C. | en_US |
dc.contributor.author | Yao, Z. G. | en_US |
dc.contributor.author | Yuan, A. F. | en_US |
dc.contributor.author | Zha, M. | en_US |
dc.contributor.author | Zhang, H. M. | en_US |
dc.contributor.author | Zhang, L. | en_US |
dc.contributor.author | Zhang, X. Y. | en_US |
dc.contributor.author | Zhang, Y. | en_US |
dc.contributor.author | Zhao, J. | en_US |
dc.contributor.author | Zhaxiciren | en_US |
dc.contributor.author | Zhaxisangzhu | en_US |
dc.contributor.author | Zhou, X. X. | en_US |
dc.contributor.author | Zhu, F. R. | en_US |
dc.contributor.author | Zhu, Q. Q. | en_US |
dc.contributor.author | ARGO-YBJ Collaboration | en_US |
dc.date.accessioned | 2021-01-08T15:34:06Z | - |
dc.date.available | 2021-01-08T15:34:06Z | - |
dc.date.issued | 2016 | en_US |
dc.identifier.issn | 0067-0049 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/29614 | - |
dc.description.abstract | We report on the extensive multi-wavelength observations of the blazar Markarian 421 (Mrk 421) covering radio to γ-rays, during the 4.5 year period of ARGO-YBJ and Fermi common operation time, from 2008 August to 2013 February. These long-term observations, extending over an energy range of 18 orders of magnitude, provide a unique chance to study the variable emission of Mrk 421. In particular, due to the ARGO-YBJ and Fermi data, the entire energy range from 100 MeV to 10 TeV is covered without any gap. In the observation period, Mrk 421 showed both low- and high-activity states at all wavebands. The correlations among flux variations in different wavebands were analyzed. The X-ray flux is clearly correlated with the TeV γ-ray flux, while the GeV γ-rays only show a partial correlation with the TeV γ-rays. Radio and UV fluxes seem to be weakly or not correlated with the X-ray and γ-ray fluxes. Seven large flares, including five X-ray flares and two GeV γ-ray flares with variable durations (3-58 days), and one X-ray outburst phase were identified and used to investigate the variation of the spectral energy distribution with respect to a relative quiescent phase. During the outburst phase and the seven flaring episodes, the peak energy in X-rays is observed to increase from sub-keV to a few keV. The TeV γ-ray flux increases up to 0.9-7.2 times the flux of the Crab Nebula. The behavior of GeV γ-rays is found to vary depending on the flare, a feature that leads us to classify flares into three groups according to the GeV flux variation. Finally, the one-zone synchrotron self-Compton model was adopted to describe the emission spectra. Two out of three groups can be satisfactorily described using injected electrons with a power-law spectral index around 2.2, as expected from relativistic diffuse shock acceleration, whereas the remaining group requires a harder injected spectrum. The underlying physical mechanisms responsible for different groups may be related to the acceleration process or to the environment properties. | en_US |
dc.language.iso | eng | en_US |
dc.title | 4.5 Years of Multi-wavelength Observations of MRK 421 During the ARGO-YBJ and FERMI Common Operation Time | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.3847/0067-0049/222/1/6 | en_US |
dc.identifier.scopus | 2-s2.0-84955476638 | en_US |
dc.identifier.isi | 000368982300006 | en_US |
dc.identifier.url | https://iopscience.iop.org/article/10.3847/0067-0049/222/1/6/meta | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 222 | en_US |
dc.relation.issue | 1 | en_US |
dc.relation.firstpage | 6 | 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 SUPPLEMENT SERIES | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2016ApJS..222....6B | 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.fulltext | With Fulltext | - |
item.cerifentitytype | Publications | - |
item.grantfulltext | open | - |
crisitem.journal.journalissn | 0067-0049 | - |
crisitem.journal.ance | E016254 | - |
crisitem.author.dept | O.A. Torino | - |
crisitem.author.dept | O.A. Torino | - |
crisitem.author.orcid | 0000-0001-9089-7875 | - |
crisitem.author.orcid | 0000-0001-7270-7556 | - |
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ApJSS_222_2016_6-Mrk421.pdf | pdf editoriale | 2.37 MB | Adobe PDF | Visualizza/apri |
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