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http://hdl.handle.net/2445/150826
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DC Field | Value | Language |
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dc.contributor.author | MAGIC Collaboration | - |
dc.contributor.author | Bosch i Ramon, Valentí | - |
dc.contributor.author | Ribó Gomis, Marc | - |
dc.contributor.author | Paredes i Poy, Josep Maria | - |
dc.contributor.author | Moldón Vara, Francisco Javier | - |
dc.date.accessioned | 2020-02-20T12:54:00Z | - |
dc.date.available | 2020-02-20T12:54:00Z | - |
dc.date.issued | 2009 | - |
dc.identifier.issn | 2041-8205 | - |
dc.identifier.uri | http://hdl.handle.net/2445/150826 | - |
dc.description.abstract | We present optical, X-ray, high-energy (30 GeV) and very high energy (100 GeV; VHE) observations of the high-frequency peaked blazar Mrk 421 taken between 2008 May 24 and June 23. A high-energy γ-ray signal was detected by AGILE with between June 9 and 15, with F(E>100 MeV) = 42+14 -12 × 10-8 photons cm-2 s-1. This flaring state is brighter than the average flux observed by EGRET by a factor of ~3, but still consistent with the highest EGRET flux. In hard X-rays (20-60 keV) SuperAGILE resolved a five-day flare (June 9-15) peaking at ~55 mCrab. SuperAGILE, RXTE/ASM and Swift/BAT data show a correlated flaring structure between soft and hard X-rays. Hints of the same flaring behavior are also detected in the simultaneous optical data provided by the GASP-WEBT. A Swift/XRT observation near the flaring maximum revealed the highest 2-10 keV flux ever observed from this source, of 2.6 × 10-9 erg cm-2 s-1 (i.e. >100 mCrab). A peak synchrotron energy of ~3 keV was derived, higher than typical values of ~0.5-1 keV. VHE observations with MAGIC and VERITAS between June 6 and 8 showed the flux peaking in a bright state, well correlated with the X-rays. This extraordinary set of simultaneous data, covering a 12-decade spectral range, allowed for a deep analysis of the spectral energy distribution as well as of correlated light curves. The γ-ray flare can be interpreted within the framework of the synchrotron self-Compton model in terms of a rapid acceleration of leptons in the jet. | - |
dc.format.extent | 7 p. | - |
dc.format.mimetype | application/pdf | - |
dc.language.iso | eng | - |
dc.publisher | Institute of Physics (IOP) | - |
dc.relation.isformatof | Reproducció del document publicat a: https://doi.org/10.1088/0004-637X/691/1/L13 | - |
dc.relation.ispartof | Astrophysical Journal Letters, 2009, vol. 691, num. 1, p. 13-19 | - |
dc.relation.uri | https://doi.org/10.1088/0004-637X/691/1/L13 | - |
dc.rights | (c) American Astronomical Society, 2009 | - |
dc.source | Articles publicats en revistes (Física Quàntica i Astrofísica) | - |
dc.subject.classification | Raigs còsmics | - |
dc.subject.classification | Raigs gamma | - |
dc.subject.classification | Raigs X | - |
dc.subject.classification | Galàxies | - |
dc.subject.other | Cosmic rays | - |
dc.subject.other | Gamma rays | - |
dc.subject.other | X-rays | - |
dc.subject.other | Galaxies | - |
dc.title | The June 2008 Flare of Markarian 421 from Optical to TeV Energies | - |
dc.type | info:eu-repo/semantics/article | - |
dc.type | info:eu-repo/semantics/publishedVersion | - |
dc.identifier.idgrec | 567366 | - |
dc.date.updated | 2020-02-20T12:54:01Z | - |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | - |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
Files in This Item:
File | Description | Size | Format | |
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567366.pdf | 496.25 kB | Adobe PDF | View/Open |
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