Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/50830
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Full metadata record
DC Field | Value | Language |
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dc.contributor.author | Aharonian, F. | - |
dc.contributor.author | Akhperjanian, A. | - |
dc.contributor.author | Barres de Almaida, U. | - |
dc.contributor.author | Bazer-Bachi, A. | - |
dc.contributor.author | Behera, B. | - |
dc.contributor.author | Beilicke, M. | - |
dc.contributor.author | Benbow, W. | - |
dc.contributor.author | Bernlohr, K. | - |
dc.contributor.author | Boisson, C. | - |
dc.contributor.author | Bolz, O. | - |
dc.contributor.author | Borrel, V. | - |
dc.contributor.author | Braun, I. | - |
dc.contributor.author | Brion, E. | - |
dc.contributor.author | Brown, A. | - |
dc.contributor.author | Buhler, R. | - |
dc.contributor.author | Bulik, T. | - |
dc.contributor.author | Busching, I. | - |
dc.contributor.author | Boutelier, T. | - |
dc.contributor.author | Carrigan, S. | - |
dc.contributor.author | Chadwick, P. | - |
dc.contributor.author | et al. | - |
dc.date.issued | 2008 | - |
dc.identifier.citation | Astronomy and Astrophysics: a European journal, 2008; 478(2):387-393 | - |
dc.identifier.issn | 0004-6361 | - |
dc.identifier.issn | 1432-0746 | - |
dc.identifier.uri | http://hdl.handle.net/2440/50830 | - |
dc.description | Copyright © ESO 2008 | - |
dc.description.abstract | The γ-ray spectrum of the low-frequency-peaked BL Lac (LBL) object AP Librae is studied, following the discovery of very-high-energy (VHE; E > 100 GeV) γ-ray emission up to the TeV range by the H.E.S.S. experiment. Thismakes AP Librae one of the few VHE emitters of the LBL type. The measured spectrum yields a flux of (8.8 ± 1.5stat ± 1.8sys) × 10−12 cm−2 s−1 above 130 GeV and a spectral index ofΓ = 2.65±0.19stat ± 0.20sys . This study also makes use of Fermi-LAT observations in the high energy (HE, E > 100 MeV) range, providing the longest continuous light curve (5 years) ever published on this source. The source underwent a flaring event between MJD 56 306–56 376 in the HE range, with a flux increase of a factor of 3.5 in the 14 day bin light curve and no significant variation in spectral shape with respect to the low-flux state. While the H.E.S.S. and (low state) Fermi-LAT fluxes are in good agreement where they overlap, a spectral curvature between the steep VHE spectrum and the Fermi-LAT spectrum is observed. The maximum of the γ-ray emission in the spectral energy distribution is located below the GeV energy range. | - |
dc.description.statementofresponsibility | F. Aharonian, A. G. Akhperjanian, U. Barres de Almeida, A. R. Bazer-Bachi, B. Behera ... Gavin P. Rowell ... et al. | - |
dc.language.iso | en | - |
dc.publisher | EDP Sciences | - |
dc.rights | © ESO 2008 | - |
dc.source.uri | http://dx.doi.org/10.1051/0004-6361:20078604 | - |
dc.subject | galaxies: active | - |
dc.subject | gamma rays: observations | - |
dc.title | Upper limits from HESS active galactic nuclei observations in 2005-2007 | - |
dc.type | Journal article | - |
dc.identifier.doi | 10.1051/0004-6361:20078604 | - |
pubs.publication-status | Published | - |
dc.identifier.orcid | Rowell, G. [0000-0002-9516-1581] | - |
Appears in Collections: | Aurora harvest 5 Chemistry and Physics publications |
Files in This Item:
File | Description | Size | Format | |
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hdl_50830.pdf | Published version | 126.61 kB | Adobe PDF | View/Open |
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