We present observations of the BL Lac object 1ES0414+009 in the >200 GeV gamma-ray band by the VERITAS array of Cherenkov telescopes. 1ES0414+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 (6.4σ) above the background. The source flux, showing no evidence for variability, is measured as (5.2 ± 1.1stat ± 2.6sys) × 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 Γ= 3.4 ± 0.5stat ± 0.3sys and a flux normalization of (1.6 ± 0.3stat ± 0.8sys) × 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. © 2012. The American Astronomical Society. All rights reserved.
Documento: | Artículo |
Título: | Multiwavelength observations of the AGN 1ES 0414+009 with veritas, FERMI-LAT, SWIFT-XRT, and MDM |
Autor: | Aliu, E.; Archambault, S.; Arlen, T.; Aune, T.; Beilicke, M.; Benbow, W.; Böttcher, M.; Bouvier, A.; Bugaev, V.; Cannon, A.; Cesarini, A.; Ciupik, L.; Collins-Hughes, E.; Connolly, M.P.; Cui, W.; Dickherber, R.; Dumm, J.; Errando, M.; Falcone, A.; Federici, S.; Feng, Q.; Finley, J.P.; 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, C.M.; Imran, A.; Jameil, O.; Kaaret, P.; Karlsson, N.; Kertzman, M.; Kerr, J.; Khassen, Y.; Kieda, D.; Krawczynski, H.; Krennrich, F.; Lang, M.J.; Lee, K.; Madhavan, A.S.; Majumdar, P.; McArthur, S.; McCann, A.; Moriarty, P.; Mukherjee, R.; Nelson, T.; O'Faoláin De Bhróithe A.; Ong, R.A.; Orr, M.; Otte, A.N.; Park, N.; Perkins, J.S.; Pichel, A.; Pohl, M.; Quinn, J.; Ragan, K.; Reynolds, P.T.; Roache, E.; Ruppel, J.; Saxon, D.B.; Schroedter, M.; Sembroski, G.H.; Şentürk, G.D.; Smith, A.W.; Staszak, D.; Stroh, M.; Telezhinsky, I.; Tesić, G.; Theiling, M.; Thibadeau, S.; Tsurusaki, K.; Varlotta, A.; Vassiliev, V.V.; Vivier, M.; Wakely, S.P.; Ward, J.E.; Weinstein, A.; Welsing, R.; Williams, D.A.; Zitzer, B. |
Filiación: | Department of Physics and Astronomy, Barnard College, Columbia University, NY 10027, United States Physics Department, McGill University, Montreal, QC H3A 2T8, Canada Department of Physics and Astronomy, University of California, Los Angeles, CA 90095, United States Santa Cruz Institute for Particle Physics, Department of Physics, University of California, Santa Cruz, CA 95064, United States Department of Physics, Washington University, St. Louis, MO 63130, United States Fred Lawrence Whipple Observatory, Harvard-Smithsonian Center for Astrophysics, Amado, AZ 85645, United States Astrophysical Institute, Department of Physics and Astronomy, Ohio University, Athens, OH 45701, United States School of Physics, University College Dublin, Belfield, Dublin 4, Ireland School of Physics, National University of Ireland Galway, University Road, Galway, Ireland Astronomy Department, Adler Planetarium and Astronomy Museum, Chicago, IL 60605, United States Department of Physics, Purdue University, West Lafayette, IN 47907, United States School of Physics and Astronomy, University of Minnesota, Minneapolis, MN 55455, United States Department of Astronomy and Astrophysics, 525 Davey Lab, Pennsylvania State University, University Park, PA 16802, United States DESY, Platanenallee 6, 15738 Zeuthen, Germany Institut für Physik und Astronomie, Universität Potsdam, 14476 Potsdam-Golm, Germany Department of Physics and Astronomy, University of Utah, Salt Lake City, UT 84112, United States Department of Physics and Astronomy, University of Iowa, Van Allen Hall, Iowa City, IA 52242, United States Enrico Fermi Institute, University of Chicago, Chicago, IL 60637, United States Department of Physics and Astronomy, Iowa State University, Ames, IA 50011, United States Department of Physics and Astronomy, DePauw University, Greencastle, IN 46135-0037, United States Department of Life and Physical Sciences, Galway-Mayo Institute of Technology, Dublin Road, Galway, Ireland School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, 837 State Street NW, Atlanta, GA 30332-0430, United States CRESST and Astroparticle Physics Laboratory NASA/GSFC, Greenbelt, MD 20771, United States Center for Space Science and Technology, University of Maryland, Baltimore County, 1000 Hilltop Circle, Baltimore, MD 21250, United States Instituto de Astronomia y Fisica Del Espacio, Casilla de Correo 67 - Sucursal 28, C1428ZAA Ciudad Autnoma de Buenos Aires, Argentina Department of Applied Physics and Instrumentation, Cork Institute of Technology, Bishopstown, Cork, Ireland Department of Physics and Astronomy, Bartol Research Institute, University of Delaware, Newark, DE 19716, United States Physics Department, Columbia University, New York, NY 10027, United States Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, IL 60439, United States |
Palabras clave: | gamma rays: galaxies |
Año: | 2012 |
Volumen: | 755 |
Número: | 2 |
DOI: | http://dx.doi.org/10.1088/0004-637X/755/2/118 |
Título revista: | Astrophysical Journal |
Título revista abreviado: | Astrophys. J. |
ISSN: | 0004637X |
Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0004637X_v755_n2_p_Aliu |