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http://hdl.handle.net/2445/150423
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DC Field | Value | Language |
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dc.contributor.author | Paredes i Poy, Josep Maria | - |
dc.contributor.author | Ribó Gomis, Marc | - |
dc.contributor.author | Munar i Adrover, Pere | - |
dc.date.accessioned | 2020-02-17T09:22:00Z | - |
dc.date.available | 2020-02-17T09:22:00Z | - |
dc.date.issued | 2012-03-05 | - |
dc.identifier.issn | 0004-637X | - |
dc.identifier.uri | http://hdl.handle.net/2445/150423 | - |
dc.description.abstract | We present the results of five years (2005-2009) of MAGIC observations of the BL Lac object PG 1553+113 at very high energies (VHEs, E > 100 GeV). Power law fits of the individual years are compatible with a steady mean photon index \Gamma = 4.27 $\pm$ 0.14. In the last three years of data, the flux level above 150 GeV shows a clear variability (probability of constant flux < 0.001%). The flux variations are modest, lying in the range from 4% to 11% of the Crab Nebula flux. Simultaneous optical data also show only modest variability that seems to be correlated with VHE gamma ray variability. We also performed a temporal analysis of (all available) simultaneous Fermi/LAT data of PG 1553+113 above 1 GeV, which reveals hints of variability in the 2008-2009 sample. Finally, we present a combination of the mean spectrum measured at very high energies with archival data available for other wavelengths. The mean spectral energy distribution can be modeled with a one-zone Synchrotron Self Compton (SSC) model, which gives the main physical parameters governing the VHE emission in the blazar jet. | - |
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/748/1/46 | - |
dc.relation.ispartof | Astrophysical Journal, 2012, vol. 748, num. 1, p. 46A | - |
dc.relation.uri | https://doi.org/10.1088/0004-637X/748/1/46 | - |
dc.rights | (c) American Astronomical Society, 2012 | - |
dc.source | Articles publicats en revistes (Física Quàntica i Astrofísica) | - |
dc.subject.classification | Raigs gamma | - |
dc.subject.classification | Galàxies | - |
dc.subject.other | Gamma rays | - |
dc.subject.other | Galaxies | - |
dc.title | PG 1553+113: five years of observations with MAGIC | - |
dc.type | info:eu-repo/semantics/article | - |
dc.type | info:eu-repo/semantics/publishedVersion | - |
dc.identifier.idgrec | 594208 | - |
dc.date.updated | 2020-02-17T09:22:00Z | - |
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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594208.pdf | 309.79 kB | Adobe PDF | View/Open |
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