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http://hdl.handle.net/2445/69532
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DC Field | Value | Language |
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dc.contributor.author | MAGIC Collaboration | - |
dc.contributor.author | Marcote Martin, Benito | - |
dc.contributor.author | Munar i Adrover, Pere | - |
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 | 2016-02-17T12:50:38Z | - |
dc.date.available | 2016-10-08T22:01:17Z | - |
dc.date.issued | 2015-10-08 | - |
dc.identifier.issn | 0004-6361 | - |
dc.identifier.uri | http://hdl.handle.net/2445/69532 | - |
dc.description.abstract | Context. In the last five years the Fermi Large Area Telescope (LAT) instrument detected GeV γ-ray emission from five novae. The GeV emission can be interpreted in terms of an inverse Compton process of electrons accelerated in a shock. In this case it is expected that protons in the same conditions can be accelerated to much higher energies. Consequently they may produce a second component in the γ-ray spectrum at TeV energies. Aims: We aim to explore the very high-energy domain to search for γ-ray emission above 50 GeV and to shed light on the acceleration process of leptons and hadrons in nova explosions. Methods: We have performed observations, with the MAGIC telescopes of the classical nova V339 Del shortly after the 2013 outburst; optical and subsequent GeV γ-ray detections triggered the MAGIC observations. We also briefly report on VHE observations of the symbiotic nova YY Her and the dwarf nova ASASSN-13ax. We complement the TeV MAGIC observations with the analysis of contemporaneous Fermi-LAT data of the sources. The TeV and GeV observations are compared in order to evaluate the acceleration parameters for leptons and hadrons. Results: No significant TeV emission was found from the studied sources. We computed upper limits on the spectrum and night-by-night flux. The combined GeV and TeV observations of V339 Del limit the ratio of proton to electron luminosities to Lp ≲ 0.15 Le. | - |
dc.format.extent | 7 p. | - |
dc.format.mimetype | application/pdf | - |
dc.language.iso | eng | - |
dc.publisher | Springer Verlag | - |
dc.relation.isformatof | Versió postprint del document publicat a: http://dx.doi.org/10.1051/0004-6361/201526478 | - |
dc.relation.ispartof | Astronomy and Astrophysics, 2015, vol. 582, p. A67-A74 | - |
dc.relation.uri | http://dx.doi.org/10.1051/0004-6361/201526478 | - |
dc.rights | (c) Springer Verlag, 2015 | - |
dc.source | Articles publicats en revistes (Física Quàntica i Astrofísica) | - |
dc.subject.classification | Estels binaris de raigs X | - |
dc.subject.classification | Noves (Estels) | - |
dc.subject.classification | Raigs gamma | - |
dc.subject.other | X-ray binaries | - |
dc.subject.other | New stars | - |
dc.subject.other | Gamma rays | - |
dc.title | Very high-energy γ-ray observations of novae and dwarf novae with the MAGIC telescopes | - |
dc.type | info:eu-repo/semantics/article | - |
dc.type | info:eu-repo/semantics/acceptedVersion | - |
dc.identifier.idgrec | 657110 | - |
dc.date.updated | 2016-02-17T12:50:38Z | - |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | - |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB)) |
Files in This Item:
File | Description | Size | Format | |
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657110.pdf | 426.31 kB | Adobe PDF | View/Open |
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