MULTIWAVELENGTH OBSERVATIONS OF THE AGN 1ES 0414+009 WITH VERITAS, FERMI-LAT, SWIFT-XRT, AND MDM

E Aliu; M Errando; S Archambault; T Arlen; T Aune; A Bouvier; M Beilicke; V Bugaev; R Dickherber; W Benbow; M Boettcher; A Cannon; E Collins-Hughes; A Cesarini; M. P Connolly; L Ciupik; W Cui; J Dumm; A Falcone; S Federici; P Kaaret

doi:10.1088/0004-637X/755/2/118

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MULTIWAVELENGTH OBSERVATIONS OF THE AGN 1ES 0414+009 WITH VERITAS, FERMI-LAT, SWIFT-XRT, AND MDM

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MULTIWAVELENGTH OBSERVATIONS OF THE AGN 1ES 0414+009 WITH VERITAS, FERMI-LAT, SWIFT-XRT, AND MDM

E Aliu, M Errando, S Archambault, T Arlen, T Aune, A Bouvier, M Beilicke, V Bugaev, R Dickherber, W Benbow, …

The Astrophysical journal, Vol.755(2), 118

08/20/2012

DOI: 10.1088/0004-637X/755/2/118

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Abstract

We present observations of the BL Lac object 1ES 0414+009 in the >200 GeV gamma-ray band by the VERITAS array of Cherenkov telescopes. 1ES 0414+009 was observed by VERITAS between 2008 January and 2011 February, resulting in 56.2 hr of good quality pointed observations. These observations resulted in a detection of 822 events from the source corresponding to a statistical significance of 6.4 standard deviations (6.4{sigma}) above the background. The source flux, showing no evidence for variability, is measured as (5.2 {+-} 1.1{sub stat} {+-} 2.6{sub sys}) Multiplication-Sign 10{sup -12} photons cm{sup -2} s{sup -1} above 200 GeV, equivalent to approximately 2% of the Crab Nebula flux above this energy. The differential photon spectrum from 230 GeV to 850 GeV is well fit by a power law with a photon index of {Gamma} = 3.4 {+-} 0.5{sub stat} {+-} 0.3{sub sys} and a flux normalization of (1.6 {+-} 0.3{sub stat} {+-} 0.8{sub sys}) Multiplication-Sign 10{sup -11} photons cm{sup -2} s{sup -1} at 300 GeV. We also present multiwavelength results taken in the optical (MDM), x-ray (Swift-XRT), and GeV (Fermi-LAT) bands and use these results to construct a broadband spectral energy distribution (SED). Modeling of this SED indicates that homogenous one-zone leptonic scenarios are not adequate to describe emission from the system, with a lepto-hadronic model providing a better fit to the data.

Astrophysics

ASTROPHYSICS, COSMOLOGY AND ASTRONOMY

BL LACERTAE OBJECTS

COMPUTERIZED SIMULATION

COSMIC PHOTONS

CRAB NEBULA

ENERGY SPECTRA

GALAXIES

GAMMA ASTRONOMY

GAMMA RADIATION

GEV RANGE

HADRONS

INDEXES

PHOTON EMISSION

RADIATION DETECTION

TELESCOPE COUNTERS

X RADIATION

Details

Title: Subtitle: MULTIWAVELENGTH OBSERVATIONS OF THE AGN 1ES 0414+009 WITH VERITAS, FERMI-LAT, SWIFT-XRT, AND MDM
Creators: E Aliu - Columbia University
M Errando - 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
V Bugaev - Washington University in St. Louis
R Dickherber - Washington University in St. Louis
W Benbow - Harvard University
M Boettcher - Ohio University
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
W Cui - Purdue University West Lafayette
J Dumm - University of Minnesota
A Falcone - Pennsylvania State University
S Federici - University of Potsdam
P Kaaret - University of Iowa, Physics and Astronomy
Resource Type: Journal article
Publication Details: The Astrophysical journal, Vol.755(2), 118
DOI: 10.1088/0004-637X/755/2/118
ISSN: 0004-637X
eISSN: 1538-4357
Publisher: Institute of Physics (IOP)
Language: English
Date published: 08/20/2012
Academic Unit: Physics and Astronomy
Record Identifier: 9984200060002771

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