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http://hdl.handle.net/2445/58577
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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 | 2014-10-14T08:46:00Z | - |
dc.date.available | 2014-10-14T08:46:00Z | - |
dc.date.issued | 2014-08 | - |
dc.identifier.issn | 0004-6361 | - |
dc.identifier.uri | http://hdl.handle.net/2445/58577 | - |
dc.description.abstract | It has been claimed that the nova-like cataclysmic variable AE Aquarii (AE Aqr) is a very-high-energy (VHE, E> 100 GeV) source both on observational and theoretical grounds. Aims: We search for VHE γ-ray emission from AE Aqr during different states of the source at several wavelengths to confirm or rule out previous claims of detection of γ-ray emission from this object. Methods: We report on observations of AE Aqr performed by MAGIC. The source was observed during 12 h as part of a multiwavelength campaign carried out between May and June 2012 covering the optical, X-ray, and γ-ray ranges. Besides MAGIC, the other facilities involved were the KVA, Skinakas, and Vidojevica telescopes in the optical and Swift in X-rays. We calculated integral upper limits coincident with different states of the source in the optical. We computed upper limits to the pulsed emission limiting the signal region to 30% of the phaseogram and we also searched for pulsed emission at different frequencies applying the Rayleigh test. Results: AE Aqr was not detected at VHEs during the multiwavelength campaign. We establish integral upper limits at the 95% confidence level for the steady emission assuming the differential flux proportional to a power-law function dφ/ dE ∝ E- Γ, with a Crab-like photon spectral index of Γ = 2.6. The upper limit above 200 GeV is 6.4 × 10-12 cm-2 s-1 and above 1 TeV is 7.4 × 10-13 cm-2 s-1. We obtained an upper limit for the pulsed emission of 2.6 × 10-12 cm-2 s-1 for energies above 200 GeV. Applying the Rayleigh test for pulsed emission at different frequencies we did not find any significant signal. Conclusions: Our results indicate that AE Aqr is not a VHE γ-ray emitter at the level of emission previously claimed. We have established the most constraining upper limits for the VHE γ-ray emission of AE Aqr. | - |
dc.format.extent | 9 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/10.1051/0004-6361/201424072 | - |
dc.relation.ispartof | Astronomy and Astrophysics, 2014, vol. 568, num. 109, p. 1-9 | - |
dc.relation.uri | http://dx.doi.org/10.1051/0004-6361/201424072 | - |
dc.rights | (c) Springer Verlag, 2014 | - |
dc.source | Articles publicats en revistes (Física Quàntica i Astrofísica) | - |
dc.subject.classification | Estels | - |
dc.subject.classification | Noves (Estels) | - |
dc.subject.classification | Raigs gamma | - |
dc.subject.classification | Astrofísica | - |
dc.subject.other | Stars | - |
dc.subject.other | New stars | - |
dc.subject.other | Gamma rays | - |
dc.subject.other | Astrophysics | - |
dc.title | MAGIC search for VHE γ-ray emission from AE Aquarii in a multiwavelength context | - |
dc.type | info:eu-repo/semantics/article | - |
dc.type | info:eu-repo/semantics/acceptedVersion | - |
dc.identifier.idgrec | 644032 | - |
dc.date.updated | 2014-10-14T08:46:00Z | - |
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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644032.pdf | 257.5 kB | Adobe PDF | View/Open |
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