2014ApJ...782...13A

Query : 2014ApJ...782...13A

2014ApJ...782...13A - Astrophys. J., 782, 13 (2014/February-2)

A three-year multi-wavelength study of the very-high-energy γ-ray blazar 1ES 0229+200.

ALIU E., ARCHAMBAULT S., ARLEN T., AUNE T., BEHERA B., BEILICKE M., BENBOW W., BERGER K., BIRD R., BOUVIER A., BUCKLEY J.H., BUGAEV V., BYRUM K., CERRUTI M., CHEN X., CIUPIK L., CONNOLLY M.P., CUI W., DUKE C., DUMM J., ERRANDO M., FALCONE A., FEDERICI S., FENG Q., FINLEY J.P., FLEISCHHACK H., FORTIN P., FORTSON L., FURNISS A., GALANTE N., GILLANDERS G.H., GRIFFIN S., GRIFFITHS S.T., GRUBE J., GYUK G., HANNA D., HOLDER J., HUGHES G., HUMENSKY T.B., JOHNSON C.A., KAARET P., KERTZMAN M., KHASSEN Y., KIEDA D., KRAWCZYNSKI H., KRENNRICH F., LANG M.J., MADHAVAN A.S., MAIER G., MAJUMDAR P., McARTHUR S., McCANN A., MEAGHER K., MILLIS J., MORIARTY P., MUKHERJEE R., NIETO D., O'FAOLAIN DE BHROITHE A., ONG R.A., OTTE A.N., PARK N., PERKINS J.S., POHL M., POPKOW A., PROKOPH H., QUINN J., RAGAN K., REYES L.C., REYNOLDS P.T., RICHARDS G.T., ROACHE E., SEMBROSKI G.H., SMITH A.W., STASZAK D., TELEZHINSKY I., THEILING M., VARLOTTA A., VASSILIEV V.V., VINCENT S., WAKELY S.P., WEEKES T.C., WEINSTEIN A., WELSING R., WILLIAMS D.A., ZAJCZYK A. and ZITZER B.

Abstract (from CDS):

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)x10–9 photons m–2/s, 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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Journal keyword(s): BL Lacertae objects: general - BL Lacertae objects: individual (1ES 0229+200, VER J0232+202) - diffuse radiation - galaxies: active - gamma rays: general - magnetic fields

Simbad objects: 6

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Number of rows : 6
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 RX J0232.8+2017 BLL 02 32 48.6148874688 +20 17 17.486717388     18.00 13.96   ~ 387 1
2 QSO B0347-121 BLL 03 49 23.1862105584 -11 59 27.366035532   18.74 18.2 17.46   ~ 245 1
3 PMN J1103-2329 BLL 11 03 37.6150845072 -23 29 31.203773520   17.00 16.55 16.61   ~ 405 1
4 PG 1218+304 BLL 12 21 21.9426947832 +30 10 37.158534012   16.50 15.85 15.7   ~ 497 1
5 RX J1428.5+4240 BLL 14 28 32.6090008440 +42 40 21.048123396   16.95 16.45 14.4   ~ 549 1
6 QSO B2356-309 BLL 23 59 07.9034996184 -30 37 40.671098544   18.414 16.44 16.795   ~ 318 2

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