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          Institute: MPI für Kernphysik     Collection: High-Energy Astrophysics     Display Documents



  history
ID: 236693.0, MPI für Kernphysik / High-Energy Astrophysics
The unidentified TeV source (TeV J2032+4130) and surrounding field: Final HEGRA IACT-Syste
Authors:Aharonian, Felix; Akhperjanian, A.; Beilicke, M.; Bernlöhr, K.; Börst, H.-G.; Bojahr, H.; Bolz, O.; Coarasa, T.; Contreras, J.; Cortina, J.; Denninghoff, S.; Fonseca, V.; Girma, M.; Götting, N.; Heinzelmann, G.; Hermann, G.; Heusler, A.; Hofmann, W.; Horns, D.; Jung, I.; Kankanyan, R.; Kestel, M.; Kohnle, A.; Konopelko, A.; Kranich, D.; Lampeiti, H.; Lopez, M.; Lorenz, E.; Lucarelli, F.; Mang, O.; Mazin, D.; Meyer, H.; Mirzoyan, R.; Moralejo, A.; Oña-Wilhelmi, E.; Panter, M.; Plyasheshnikov, A.; Pühlhofer, G.; de los Reyes, R.; Rhode, W.; Ripken, J.; Rowell, Gavin; Sahakian, V.; Samorski, M.; Schilling, M.; Siems, M.; Sobzynska, D.; Stamm, W.; Tluczykont, M.; Vitale, V.; Völk, Heinrich; Wiedner, C.A.; Wittek, W.
Language:English
Research Context:HEGRA
Date of Publication (YYYY-MM-DD):2005-02-03
Title of Journal:Astronomy & Astrophysics
Journal Abbrev.:A&A
Volume:431
Issue / Number:1
Start Page:197
End Page:202
Copyright:ESO 2005
Review Status:not specified
Audience:Experts Only
Abstract / Description:The unidentified TeV source in Cygnus is now confirmed by follow-up observations from 2002 with the HEGRA stereoscopic system of Cherenkov Telescopes. Using all data (1999 to 2002) we confirm this new source as steady in flux over the four years of data taking, extended with radius 6.2 ( ± 1.2'stat ± 0.9'sys ) and exhibiting a hard spectrum with photon index -1.9. It is located in the direction of the dense OB stellar association, Cygnus OB2. Its integral flux above energies E>1 TeV amounts to ~5% of the Crab assuming a Gaussian profile for the intrinsic source morphology. There is no obvious counterpart at radio, optical nor X-ray energies, leaving TeV J2032+4130 presently unidentified. Observational parameters of this source are updated here and some astrophysical discussion is provided. Also included are upper limits for a number of other interesting sources in the FoV, including the famous microquasar Cygnus X-3.
Free Keywords:gamma rays: observations -- stars: early-type -- open clusters and associations: individual: Cygnus OB2
HEGRA
External Publication Status:published
Document Type:Article
Affiliations:MPI für Kernphysik/Group of H. J. Völk/High Energy Astrophysics (F. Aharonian)
MPI für Kernphysik/Group of W. Hofmann/Experimental High-Energy Astrophysics (M. Panter, G. Hermann)
External Affiliations:Yerevan Physics Institute, Alikhanian Br.2, 375036 Yerevan, Armenia
Universität Hamburg, Institut für Experimentalphysik, Luruper Chaussee 149, 22761 Hamburg, Germany
Universität Kiel, Inst. f. Experimentelle und Angewandte Physik, Leibnizstr. 15-19, 24118 Kiel, Germany
Universität Wuppertal, Fachbereich Physik, Gaußstr. 20, 42097 Wuppertal, Germany
Max-Planck-Institut für Physik, Föhringer Ring 6, 80805 München, Germany
Universität Complutense, Facultad de Ciencias Fisicas, Ciudad Universitaria, 28040 Madrid, Spain
Washington University, St. Louis MO 63130, USA
Humboldt Universität f. Phyik, Unter den Linden 6, 10099 Berlin, Germany
Altai State University, Dimitrov Street 66, 656099 Barnaul, Russia
Landessternwarte Heidelberg, Königstuhl, 69117 Heidelberg, Germany
University Lodz, Poland
Laboratoire Leprince-Ringuet, Ecole Polytechnique, 91128 Palaiseau, France (IN2P3/CNRS)
Identifiers:DOI:10.1051/0004-6361:20041552
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