Report
A Three-Year Multi-Wavelength Study of the Very-High-Energy $\gamma$-Ray Blazar 1ES 0229+200
pp 13(2014). doi:10.1088/0004-637X/782/1/13
2014
Abstract
The high-frequency-peaked BL Lacertae object 1ES 0229+200 is a relatively distant (z = 0.1396), hard-spectrum (Γ ~ 2.5), very-high-energy (VHE; E > 100 GeV) emitting γ-ray blazar. VHE measurements of this active galactic nucleus have been used to place constraints on the intensity of the extragalactic background light and the intergalactic magnetic field (IGMF). A multi-wavelength study of this object centered around VHE observations by Very Energetic Radiation Imaging Telescope Array System (VERITAS) is presented. This study obtained, over a period of three years, an 11.7 standard deviation detection and an average integral flux F(E > 300 GeV) = (23.3 ± 2.8stat ± 5.8sys) × 10–9 photons m–2 s–1, or 1.7% of the Crab Nebula's flux (assuming the Crab Nebula spectrum measured by H.E.S.S). Supporting observations from Swift and RXTE are analyzed. The Swift observations are combined with previously published Fermi observations and the VHE measurements to produce an overall spectral energy distribution which is then modeled assuming one-zone synchrotron-self-Compton emission. The χ2 probability of the TeV flux being constant is 1.6%. This, when considered in combination with measured variability in the X-ray band, and the demonstrated variability of many TeV blazars, suggests that the use of blazars such as 1ES 0229+200 for IGMF studies may not be straightforward and challenges models that attribute hard TeV spectra to secondary γ-ray production along the line of sight.
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- Title
- A Three-Year Multi-Wavelength Study of the Very-High-Energy $\gamma$-Ray Blazar 1ES 0229+200
- Creators
- E AliuS ArchambaultT ArlenT AuneB Behera - Deutsches Elektronen-SynchrotronM BeilickeW BenbowK BergerR BirdA BouvierJ. H BuckleyV BugaevK ByrumM CerrutiXuhui Chen - Deutsches Elektronen-SynchrotronL CiupikM. P ConnollyW CuiC DukeJ DummM ErrandoA FalconeS FedericiQ FengJ. P FinleyH Fleischhack - Deutsches Elektronen-SynchrotronP FortinL FortsonA FurnissN GalanteG. H GillandersS GriffinS. T GriffithsJ GrubeG GyukD HannaJ HolderGareth HughesT. B HumenskyC. A JohnsonP KaaretM KertzmanY KhassenD KiedaH KrawczynskiF KrennrichM. J LangA. S MadhavanG Maier - Deutsches Elektronen-SynchrotronP MajumdarS McArthurA McCannK MeagherJ MillisP MoriartyR MukherjeeD NietoA O'Faoláin De BhróitheR. A OngA. N OtteN ParkJeremy S PerkinsMartin Pohl - Deutsches Elektronen-SynchrotronA PopkowH Prokoph - Deutsches Elektronen-SynchrotronJ QuinnK RaganL. C ReyesP. T ReynoldsG. T RichardsE RoacheG. H SembroskiA. W SmithD StaszakI Telezhinsky - Deutsches Elektronen-SynchrotronM TheilingA VarlottaV. V VassilievStephane VincentS. P WakelyT. C WeekesA WeinsteinR Welsing - Deutsches Elektronen-SynchrotronD. A WilliamsA ZajczykB Zitzer
- Publication Details
- pp 13(2014). doi:10.1088/0004-637X/782/1/13
- Publisher
- Deutsches Elektronen-Synchrotron, DESY, Hamburg
- Resource Type
- Report
- Language
- English
- Academic Unit
- Physics
- Other Identifier
- 991019201386204721