Discovery of high-energy and very high energy γ-ray emission from the blazar RBS 0413

We report on the discovery of high-energy (HE; E > 0.1GeV) and very high energy (VHE; E > 100GeV) γ-ray emission from the high-frequency-peaked BL Lac object RBS0413. VERITAS, a ground-based γ-ray observatory, detected VHE γ rays from RBS0413 with a statistical significance of 5.5 standard dev...

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Detalles Bibliográficos
Publicado: 2012
Materias:
gamma rays: galaxies
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0004637X_v750_n2_p_Aliu
http://hdl.handle.net/20.500.12110/paper_0004637X_v750_n2_p_Aliu
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_0004637X_v750_n2_p_Aliu
record_format dspace
spelling paper:paper_0004637X_v750_n2_p_Aliu2023-06-08T14:29:05Z Discovery of high-energy and very high energy γ-ray emission from the blazar RBS 0413 gamma rays: galaxies We report on the discovery of high-energy (HE; E > 0.1GeV) and very high energy (VHE; E > 100GeV) γ-ray emission from the high-frequency-peaked BL Lac object RBS0413. VERITAS, a ground-based γ-ray observatory, detected VHE γ rays from RBS0413 with a statistical significance of 5.5 standard deviations (σ) and a γ-ray flux of (1.5 ± 0.6 stat ± 0.7syst) × 10-8 photons m-2 s-1 (1% of the Crab Nebula flux) above 250GeV. The observed spectrum can be described by a power law with a photon index of 3.18 ± 0.68stat ± 0.30syst. Contemporaneous observations with the Large Area Telescope (LAT) on the Fermi Gamma-ray Space Telescope detected HE γ rays from RBS0413 with a statistical significance of more than 9σ, a power-law photon index of 1.57 ± 0.12 stat +0.11 - 0.12sys, and a γ-ray flux between 300MeV and 300GeV of (1.64 ± 0.43stat +0.31 - 0.22sys) × 10-5 photons m-2 s -1. We present the results from Fermi-LAT and VERITAS, including a spectral energy distribution modeling of the γ-ray, quasi-simultaneous X-ray (Swift-XRT), ultraviolet (Swift-UVOT), and R-band optical (MDM) data. We find that, if conditions close to equipartition are required, both the combined synchrotron self-Compton/external-Compton and the lepto-hadronic models are preferred over a pure synchrotron self-Compton model. © 2012 The American Astronomical Society. All rights reserved. 2012 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0004637X_v750_n2_p_Aliu http://hdl.handle.net/20.500.12110/paper_0004637X_v750_n2_p_Aliu
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic gamma rays: galaxies
spellingShingle gamma rays: galaxies
Discovery of high-energy and very high energy γ-ray emission from the blazar RBS 0413
topic_facet gamma rays: galaxies
description We report on the discovery of high-energy (HE; E > 0.1GeV) and very high energy (VHE; E > 100GeV) γ-ray emission from the high-frequency-peaked BL Lac object RBS0413. VERITAS, a ground-based γ-ray observatory, detected VHE γ rays from RBS0413 with a statistical significance of 5.5 standard deviations (σ) and a γ-ray flux of (1.5 ± 0.6 stat ± 0.7syst) × 10-8 photons m-2 s-1 (1% of the Crab Nebula flux) above 250GeV. The observed spectrum can be described by a power law with a photon index of 3.18 ± 0.68stat ± 0.30syst. Contemporaneous observations with the Large Area Telescope (LAT) on the Fermi Gamma-ray Space Telescope detected HE γ rays from RBS0413 with a statistical significance of more than 9σ, a power-law photon index of 1.57 ± 0.12 stat +0.11 - 0.12sys, and a γ-ray flux between 300MeV and 300GeV of (1.64 ± 0.43stat +0.31 - 0.22sys) × 10-5 photons m-2 s -1. We present the results from Fermi-LAT and VERITAS, including a spectral energy distribution modeling of the γ-ray, quasi-simultaneous X-ray (Swift-XRT), ultraviolet (Swift-UVOT), and R-band optical (MDM) data. We find that, if conditions close to equipartition are required, both the combined synchrotron self-Compton/external-Compton and the lepto-hadronic models are preferred over a pure synchrotron self-Compton model. © 2012 The American Astronomical Society. All rights reserved.
title Discovery of high-energy and very high energy γ-ray emission from the blazar RBS 0413
title_short Discovery of high-energy and very high energy γ-ray emission from the blazar RBS 0413
title_full Discovery of high-energy and very high energy γ-ray emission from the blazar RBS 0413
title_fullStr Discovery of high-energy and very high energy γ-ray emission from the blazar RBS 0413
title_full_unstemmed Discovery of high-energy and very high energy γ-ray emission from the blazar RBS 0413
title_sort discovery of high-energy and very high energy γ-ray emission from the blazar rbs 0413
publishDate 2012
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0004637X_v750_n2_p_Aliu
http://hdl.handle.net/20.500.12110/paper_0004637X_v750_n2_p_Aliu
_version_ 1768544065753710592

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