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Discovery of very high energy γ -ray emission from the BL Lacertae object PKS 0301−243 with H.E.S.S
- Source :
- Astronomy and astrophysics 559(A136), 1-11 (2013). doi:10.1051/0004-6361/201321639, CONICET Digital (CONICET), Consejo Nacional de Investigaciones Científicas y Técnicas, instacron:CONICET, Astronomy and astrophysics, 2013, Vol.559, pp.A136 [Peer Reviewed Journal], Astronomy and Astrophysics-A&A, Astronomy and Astrophysics-A&A, EDP Sciences, 2013, 559, pp.A136. ⟨10.1051/0004-6361/201321639⟩, Astronomy and Astrophysics-A&A, 2013, 559, pp.A136. ⟨10.1051/0004-6361/201321639⟩
- Publication Year :
- 2013
- Publisher :
- EDP Sciences, 2013.
-
Abstract
- The active galactic nucleus PKS 0301−243 (z = 0.266) is a high-synchrotron-peaked BL Lac object that is detected at high energies (HE, 100 MeV 100 GeV) by the High Energy Stereoscopic System (H.E.S.S.) from observations between September 2009 and December 2011 for a total live time of 34.9 h. Gamma rays above 200 GeV are detected at a significance of 9.4σ. A hint of variability at the 2.5σ level is found. An integral flux I(E > 200 GeV) = (3.3 ± 1.1stat ± 0.7syst) × 10-12 ph cm-2 s-1 and a photon index Γ = 4.6 ± 0.7stat ± 0.2syst are measured. Multi-wavelength light curves in HE, X-ray and optical bands show strong variability, and a minimal variability timescale of eight days is estimated from the optical light curve. A single-zone leptonic synchrotron self-Compton scenario satisfactorily reproduces the multi-wavelength data. In this model, the emitting region is out of equipartition and the jet is particle dominated. Because of its high redshift compared to other sources observed at TeV energies, the very high energy emission from PKS 0301−243 is attenuated by the extragalactic background light (EBL) and the measured spectrum is used to derive an upper limit on the opacity of the EBL. Fil: Abramowski, A.. Universitat Hamburg; Alemania Fil: Acero, F.. Universite Montpellier II; Francia Fil: Aharonian, F.. Max Planck Institut für Kernphysik; Alemania Fil: Benkhali, F. Ait. Max Planck Institut für Kernphysik; Alemania Fil: Akhperjanian, A. G.. National Academy of Sciences of the Republic of Armenia; Armenia Fil: Medina, Maria Clementina. Provincia de Buenos Aires. Gobernación. Comision de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomia; Argentina Fil: Valerius, K.. Universität Erlangen Nürnberg; Alemania Fil: van Eldik, C.. Universität Erlangen Nürnberg; Alemania Fil: Vasileiadis, G.. Universite Montpellier II; Francia Fil: Venter, C.. North West University; Sudáfrica Fil: Viana, A.. Max Planck Institut für Kernphysik; Alemania Fil: Vincent, P.. Université Paris Diderot - Paris 7; Francia Fil: Völk, H. J.. Max Planck Institut für Kernphysik; Alemania Fil: Volpe, F.. Max Planck Institut für Kernphysik; Alemania Fil: Vorster, M.. North West University; Sudáfrica Fil: Wagner, S. J.. Universität Heidelberg; Alemania Fil: Wagner, P.. Humboldt Universität zu Berlin; Alemania Fil: Ward, M.. University Of Durham; Reino Unido Fil: Weidinger, M.. Ruhr-universität Bochum; Alemania Fil: Weitzel, Q.. Max Planck Institut für Kernphysik; Alemania Fil: White, R.. The University of Leicester; Reino Unido Fil: Wierzcholska, A.. Uniwersytet Jagiellonski; Polonia Fil: Willmann, P.. Universität Erlangen Nürnberg; Alemania Fil: Wörnlein, A.. Universität Erlangen Nürnberg; Alemania Fil: Wouters, D.. CEA Saclay; Francia Fil: Zacharias, M.. Ruhr-universität Bochum; Alemania Fil: Zajczyk, A.. Universite Montpellier II; Francia Fil: Zdziarski, A. A.. Nicolaus Copernicus Astronomical Center; Polonia Fil: Zech, A.. Université Paris Diderot - Paris 7; Francia Fil: Zechlin, H. S.. Universitat Hamburg; Alemania
- Subjects :
- Active galactic nucleus
active [Galaxies]
Opacity
Ciencias Físicas
Astrophysics::High Energy Astrophysical Phenomena
galaxies: active
Astrophysics::Cosmology and Extragalactic Astrophysics
Astrophysics
7. Clean energy
01 natural sciences
non-thermal. [Radiation mechanisms]
purl.org/becyt/ford/1 [https]
Gamma ray galaxies
BL Lacertae objects: individual: PKS 0301-243
gamma rays: galaxies
0103 physical sciences
Radiation mechanisms
galaxie [gamma rays]
individual: PKS 0301-243 [BL Lacertae objects]
High Energy Stereoscopic System
010303 astronomy & astrophysics
BL Lacertae objects: general
Galaxies: active
Gamma rays: galaxies
Radiation mechanisms: non-thermal
PKS 0301-243 (objeto BL Lacertae)
Non thermal mechanisms
Physics
general [BL Lacertae objects]
010308 nuclear & particles physics
Gamma ray
Astronomy and Astrophysics
purl.org/becyt/ford/1.3 [https]
radiation mechanisms: non-thermal
non-thermal [radiation mechanisms]
Light curve
Redshift
Astronomía
Extragalactic background light
13. Climate action
Space and Planetary Science
galaxies [gamma rays]
Active galaxies
BL Lacertae objects
ddc:520
High Energy Physics::Experiment
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
CIENCIAS NATURALES Y EXACTAS
BL Lac object
Subjects
Details
- Language :
- English
- ISSN :
- 00046361
- Database :
- OpenAIRE
- Journal :
- Astronomy and astrophysics 559(A136), 1-11 (2013). doi:10.1051/0004-6361/201321639, CONICET Digital (CONICET), Consejo Nacional de Investigaciones Científicas y Técnicas, instacron:CONICET, Astronomy and astrophysics, 2013, Vol.559, pp.A136 [Peer Reviewed Journal], Astronomy and Astrophysics-A&A, Astronomy and Astrophysics-A&A, EDP Sciences, 2013, 559, pp.A136. ⟨10.1051/0004-6361/201321639⟩, Astronomy and Astrophysics-A&A, 2013, 559, pp.A136. ⟨10.1051/0004-6361/201321639⟩
- Accession number :
- edsair.doi.dedup.....3a10727e5ac0af50de3f9b5d156067c8