Please use this identifier to cite or link to this item:
https://hdl.handle.net/2445/96037
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DC Field | Value | Language |
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dc.contributor.author | NuSTAR Team | - |
dc.contributor.author | MAGIC Collaboration | - |
dc.contributor.author | VERITAS Collaboration | - |
dc.contributor.author | F-Gamma Consortium | - |
dc.contributor.author | Galindo Fernández, Daniel | - |
dc.contributor.author | Marcote Martin, Benito | - |
dc.contributor.author | Paredes i Poy, Josep Maria | - |
dc.contributor.author | Paredes Fortuny, Xavier | - |
dc.contributor.author | Ribó Gomis, Marc | - |
dc.contributor.author | Zanin, Roberta | - |
dc.date.accessioned | 2016-03-02T08:54:48Z | - |
dc.date.available | 2016-03-02T08:54:48Z | - |
dc.date.issued | 2015-10-22 | - |
dc.identifier.issn | 0004-637X | - |
dc.identifier.uri | https://hdl.handle.net/2445/96037 | - |
dc.description.abstract | We report on simultaneous broadband observations of the TeV-emitting blazar Markarian 501 between 2013 April 1 and August 10, including the first detailed characterization of the synchrotron peak with Swift and NuSTAR. During the campaign, the nearby BL Lac object was observed in both a quiescent and an elevated state. The broadband campaign includes observations with NuSTAR, MAGIC, VERITAS, the Fermi Large Area Telescope, Swift X-ray Telescope and UV Optical Telescope, various ground-based optical instruments, including the GASP-WEBT program, as well as radio observations by OVRO, Metsähovi, and the F-Gamma consortium. Some of the MAGIC observations were affected by a sand layer from the Saharan desert, and had to be corrected using event-by-event corrections derived with a Light Detection and Ranging (LIDAR) facility. This is the first time that LIDAR information is used to produce a physics result with Cherenkov Telescope data taken during adverse atmospheric conditions, and hence sets a precedent for the current and future ground-based gamma-ray instruments. The NuSTAR instrument provides unprecedented sensitivity in hard X-rays, showing the source to display a spectral energy distribution (SED) between 3 and 79 keV consistent with a log-parabolic spectrum and hard X-ray variability on hour timescales. None (of the four extended NuSTAR observations) show evidence of the onset of inverse-Compton emission at hard X-ray energies. We apply a single-zone equilibrium synchrotron self-Compton (SSC) model to five simultaneous broadband SEDs. We find that the SSC model can reproduce the observed broadband states through a decrease in the magnetic field strength coinciding with an increase in the luminosity and hardness of the relativistic leptons responsible for the high-energy emission. | - |
dc.format.extent | 22 p. | - |
dc.format.mimetype | application/pdf | - |
dc.language.iso | eng | - |
dc.publisher | Institute of Physics (IOP) | - |
dc.relation.isformatof | Reproducció del document publicat a: http://dx.doi.org/10.1088/0004-637X/812/1/65 | - |
dc.relation.ispartof | Astrophysical Journal, 2015, vol. 812, num. 1 | - |
dc.relation.uri | http://dx.doi.org/10.1088/0004-637X/812/1/65 | - |
dc.rights | (c) American Astronomical Society, 2015 | - |
dc.source | Articles publicats en revistes (Física Quàntica i Astrofísica) | - |
dc.subject.classification | Galàxies | - |
dc.subject.classification | Raigs X | - |
dc.subject.other | Galaxies | - |
dc.subject.other | X-rays | - |
dc.title | First NuSTAR Observations of Mrk 501 within a Radio to TeV Multi-Instrument Campaign | - |
dc.type | info:eu-repo/semantics/article | - |
dc.type | info:eu-repo/semantics/publishedVersion | - |
dc.identifier.idgrec | 657261 | - |
dc.date.updated | 2016-03-02T08:54:53Z | - |
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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657261.pdf | 1.88 MB | Adobe PDF | View/Open |
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