DISCOVERY OF HIGH-ENERGY AND VERY HIGH ENERGY {gamma}-RAY EMISSION FROM THE BLAZAR RBS 0413

E Aliu; S Archambault; T Arlen; T Aune; A Bouvier; M Beilicke; J H Buckley; V Bugaev; W Benbow; M Boettcher; S M Bradbury; K Byrum; G Decerprit; A Cannon; E Collins-Hughes; A Cesarini; M P Connolly; L Ciupik; P Coppi; W Cui; P Kaaret

doi:10.1088/0004-637X/750/2/94

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DISCOVERY OF HIGH-ENERGY AND VERY HIGH ENERGY {gamma}-RAY EMISSION FROM THE BLAZAR RBS 0413

Journal article

Peer reviewed

DISCOVERY OF HIGH-ENERGY AND VERY HIGH ENERGY {gamma}-RAY EMISSION FROM THE BLAZAR RBS 0413

E Aliu, S Archambault, T Arlen, T Aune, A Bouvier, M Beilicke, J H Buckley, V Bugaev, W Benbow, M Boettcher, …

The Astrophysical journal, Vol.750(2), 94

05/10/2012

DOI: 10.1088/0004-637X/750/2/94

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Abstract

We report on the discovery of high-energy (HE; E > 0.1 GeV) and very high energy (VHE; E > 100 GeV) {gamma}-ray emission from the high-frequency-peaked BL Lac object RBS 0413. VERITAS, a ground-based {gamma}-ray observatory, detected VHE {gamma} rays from RBS 0413 with a statistical significance of 5.5 standard deviations ({sigma}) and a {gamma}-ray flux of (1.5 {+-} 0.6{sub stat} {+-} 0.7{sub syst}) Multiplication-Sign 10{sup -8} photons m{sup -2} s{sup -1} ({approx}1% of the Crab Nebula flux) above 250 GeV. The observed spectrum can be described by a power law with a photon index of 3.18 {+-} 0.68{sub stat} {+-} 0.30{sub syst}. Contemporaneous observations with the Large Area Telescope (LAT) on the Fermi Gamma-ray Space Telescope detected HE {gamma} rays from RBS 0413 with a statistical significance of more than 9{sigma}, a power-law photon index of 1.57 {+-} 0.12{sub stat}+{sup 0.11}{sub -0.12sys}, and a {gamma}-ray flux between 300 MeV and 300 GeV of (1.64 {+-} 0.43{sub stat}{sup +0.31}{sub -0.22sys}) Multiplication-Sign 10{sup -5} photons m{sup -2} s{sup -1}. We present the results from Fermi-LAT and VERITAS, including a spectral energy distribution modeling of the {gamma}-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.

Astrophysics

Telescopes

ASTROPHYSICS, COSMOLOGY AND ASTRONOMY

BL LACERTAE OBJECTS

COMPUTERIZED SIMULATION

COSMIC PHOTONS

CRAB NEBULA

GALAXIES

GAMMA ASTRONOMY

GAMMA RADIATION

GAMMA SPECTRA

GEV RANGE

HADRONS

INDEXES

MEV RANGE

PHOTON EMISSION

ULTRAVIOLET RADIATION

X RADIATION

Details

Title: Subtitle: DISCOVERY OF HIGH-ENERGY AND VERY HIGH ENERGY {gamma}-RAY EMISSION FROM THE BLAZAR RBS 0413
Creators: E Aliu - Columbia University
S Archambault - McGill University
T Arlen - University of California, Los Angeles
T Aune - University of California, Santa Cruz
A Bouvier - University of California, Santa Cruz
M Beilicke - Washington University in St. Louis
J H Buckley - Washington University in St. Louis
V Bugaev - Washington University in St. Louis
W Benbow - Harvard University
M Boettcher - Ohio University
S M Bradbury - University of Leeds
K Byrum - Argonne National Laboratory
G Decerprit - Argonne National Laboratory
A Cannon - University College Dublin
E Collins-Hughes - University College Dublin
A Cesarini - Ollscoil na Gaillimhe – University of Galway
M P Connolly - Ollscoil na Gaillimhe – University of Galway
L Ciupik - Adler Planetarium
P Coppi - Yale University
W Cui - Purdue University West Lafayette
P Kaaret - University of Iowa, Physics and Astronomy
Resource Type: Journal article
Publication Details: The Astrophysical journal, Vol.750(2), 94
DOI: 10.1088/0004-637X/750/2/94
ISSN: 0004-637X
eISSN: 1538-4357
Publisher: Institute of Physics (IOP)
Language: English
Date published: 05/10/2012
Academic Unit: Physics and Astronomy
Record Identifier: 9984199691802771

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