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Investigating the TeV morpholoy of MGRO J1908+06 with veritas

  • We report on deep observations of the extended TeV gamma-ray source MGRO J1908+06 made with the VERITAS very high energy gamma-ray observatory. Previously, the TeV emission has been attributed to the pulsar wind nebula (PWN) of the Fermi-LAT pulsar PSR J1907+0602. We detect MGRO J1908+06 at a significance level of 14 standard deviations (14 sigma) and measure a photon index of 2.20 +/- 0.10(stat) +/- 0.20(sys). The TeV emission is extended, covering the region near PSR J1907+0602 and also extending toward SNR G40.5-0.5. When fitted with a two-dimensional Gaussian, the intrinsic extension has a standard deviation of sigma(src) = 0 degrees.44 +/- 0 degrees.02. In contrast to other TeV PWNe of similar age in which the TeV spectrum softens with distance from the pulsar, the TeV spectrum measured near the pulsar location is consistent with that measured at a position near the rim of G40.5-0.5, 0 degrees.33 away.

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Author details:E. Aliu, S. Archambault, T. Aune, B. Behera, M. Beilicke, W. Benbow, K. Berger, R. Bird, J. H. Buckley, V. Bugaev, J. V. Cardenzana, M. Cerruti, Xuhui Chen, L. Ciupik, E. Collins-Hughes, M. P. Connolly, W. Cui, J. Dumm, Vikram V. DwarkadasORCiD, M. Errando, A. Falcone, Simone FedericiGND, Q. Feng, J. P. Finley, H. Fleischhack, P. Fortin, L. Fortson, A. Furniss, N. Galante, D. Gall, G. H. Gillanders, S. Griffin, S. T. Griffiths, J. Grube, G. Gyuk, D. Hanna, J. Holder, G. Hughes, T. B. Humensky, P. Kaaret, M. Kertzman, Y. Khassen, D. Kieda, F. Krennrich, S. Kumar, M. J. Lang, A. S. Madhavan, G. Maier, A. J. McCann, K. Meagher, J. Millis, P. Moriarty, R. Mukherjee, D. Nieto, R. A. Ong, A. N. Otte, D. Pandel, N. Park, Martin PohlORCiDGND, A. Popkow, H. Prokoph, J. Quinn, K. Ragan, J. Rajotte, G. Ratliff, L. C. Reyes, P. T. Reynolds, G. T. Richards, E. Roache, J. Rousselle, G. H. Sembroski, K. Shahinyan, F. Sheidaei, A. W. Smith, D. Staszak, Igor O. TelezhinskyORCiD, K. Tsurusaki, J. V. Tucci, J. Tyler, A. Varlotta, V. V. Vassiliev, S. Vincent, S. P. Wakely, J. E. Ward, A. Weinstein, R. Welsing, Alina WilhelmORCiDGND
DOI:https://doi.org/10.1088/0004-637X/787/2/166
ISSN:0004-637X
ISSN:1538-4357
Title of parent work (English):The astrophysical journal : an international review of spectroscopy and astronomical physics
Publisher:IOP Publ. Ltd.
Place of publishing:Bristol
Publication type:Article
Language:English
Year of first publication:2014
Publication year:2014
Release date:2017/03/27
Tag:ISM: supernova remnants; gamma rays: general; gamma-ray burst: individual (MGRO J1908+06, VER J1907+062); pulsars: individual (PSR J1907+0602)
Volume:787
Issue:2
Number of pages:7
Funding institution:U.S. Department of Energy Office of Science; U.S. National Science Foundation and the Smithsonian Institution; NSERC in Canada; Science Foundation Ireland [SFI 10/RFP/AST2748]; STFC in the U.K
Organizational units:Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie
Peer review:Referiert
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