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(stat) + - 2.6(sys)) x 10(-12) photons cm(-2) s(-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(stat) + - 0.3(sys) and a flux normalization of (1.6 + - 0.3(stat) + - 0.8(sys)) x 10(-11) photons cm(-2) s(-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.
| Original language | English (Ireland) |
|---|---|
| Journal | Astrophysical Journal |
| Volume | 755 |
| Publication status | Published - 1 Aug 2012 |
Authors (Note for portal: view the doc link for the full list of authors)
- Authors
- Aliu, E,Archambault, S,Arlen, T,Aune, T,Beilicke, M,Benbow, W,Bottcher, M,Bouvier, A,Bugaev, V,Cannon, A,Cesarini, A,Ciupik, L,Collins-Hughes, E,Connolly, MP,Cui, W,Dickherber, R,Dumm, J,Errando, M,Falcone, A,Federici, S,Feng, Q,Finley, JP,Finnegan, G,Fortson, L,Furniss, A,Galante, N,Gall, D,Godambe, S,Griffin, S,Grube, J,Gyuk, G,Hanna, D,Holder, J,Huan, H,Hughes, G,Hui, CM,Imran, A,Jameil, O,Kaaret, P,Karlsson, N,Kertzman, M,Kerr, J,Khassen, Y,Kieda, D,Krawczynski, H,Krennrich, F,Lang, MJ,Lee, K,Madhavan, AS,Majumdar, P,McArthur, S,McCann, A,Moriarty, P,Mukherjee, R,Nelson, T,de Bhroithe, AO,Ong, RA,Orr, M,Otte, AN,Park, N,Perkins, JS,Pichel, A,Pohl, M,Quinn, J,Ragan, K,Reynolds, PT,Roache, E,Ruppel, J,Saxon, DB,Schroedter, M,Sembroski, GH,Senturk, GD,Smith, AW,Staszak, D,Stroh, M,Telezh