E. Aliu, T. Aune, B. Behera, M. Beilicke, W. Benbow, K. Berger, R. Bird, A. Bouvier, J. H. Buckley, V. Bugaev, M. Cerruti, Xuhui Chen, L. Ciupik, M. P. Connolly, W. Cui, J. Dumm, Vikram V. Dwarkadas, M. Errando, A. Falcone, Simone Federici, Q. Feng, J. P. Finley, H. Fleischhack, P. Fortin, L. Fortson, A. Furniss, N. Galante, G. H. Gillanders, E. V. Gotthelf, S. Griffin, S. T. Griffiths, J. Grube, G. Gyuk, D. Hanna, J. Holder, G. Hughes, T. B. Humensky, C. A. Johnson, P. Kaaret, O. Kargaltsev, M. Kertzman, Y. Khassen, D. Kieda, F. Krennrich, M. J. Lang, A. S. Madhavan, G. Maier, S. McArthur, A. McCann, J. Millis, P. Moriarty, R. Mukherjee, D. Nieto, R. A. Ong, A. N. Otte, D. Pandel, N. Park, Martin Pohl, A. Popkow, H. Prokoph, J. Quinn, K. Ragan, J. Rajotte, L. C. Reyes, P. T. Reynolds, G. T. Richards, E. Roache, M. Roberts, G. H. Sembroski, K. Shahinyan, A. W. Smith, D. Staszak, Igor O. Telezhinsky, J. V. Tucci, J. Tyler, S. Vincent, S. P. Wakely, A. Weinstein, R. Welsing, Alina Wilhelm, D. A. Williams, B. Zitzer
- We present very high energy (VHE) imaging of MGRO J2019+37 obtained with the VERITAS observatory. The bright extended (similar to 2 degrees) unidentified Milagro source is located toward the rich star formation region Cygnus-X. MGRO J2019+37 is resolved into two VERITAS sources. The faint, point-like source VER J2016+371 overlaps CTB 87, a filled-center remnant (SNR) with no evidence of a supernova remnant shell at the present time. Its spectrum is well fit in the 0.65-10 TeV energy range by a power-law model with photon index 2.3 +/- 0.4. VER J2019+378 is a bright extended (similar to 1 degrees) source that likely accounts for the bulk of the Milagro emission and is notably coincident with PSR J2021+3651 and the star formation region Sh 2-104. Its spectrum in the range 1-30 TeV is well fit with a power-law model of photon index 1.75 +/- 0.3, among the hardest values measured in the VHE band, comparable to that observed near Vela-X. We explore the unusual spectrum and morphology in the radio and X-ray bands to constrain possibleWe present very high energy (VHE) imaging of MGRO J2019+37 obtained with the VERITAS observatory. The bright extended (similar to 2 degrees) unidentified Milagro source is located toward the rich star formation region Cygnus-X. MGRO J2019+37 is resolved into two VERITAS sources. The faint, point-like source VER J2016+371 overlaps CTB 87, a filled-center remnant (SNR) with no evidence of a supernova remnant shell at the present time. Its spectrum is well fit in the 0.65-10 TeV energy range by a power-law model with photon index 2.3 +/- 0.4. VER J2019+378 is a bright extended (similar to 1 degrees) source that likely accounts for the bulk of the Milagro emission and is notably coincident with PSR J2021+3651 and the star formation region Sh 2-104. Its spectrum in the range 1-30 TeV is well fit with a power-law model of photon index 1.75 +/- 0.3, among the hardest values measured in the VHE band, comparable to that observed near Vela-X. We explore the unusual spectrum and morphology in the radio and X-ray bands to constrain possible emission mechanisms for this source.…
MetadatenAuthor details: | E. Aliu, T. Aune, B. Behera, M. Beilicke, W. Benbow, K. Berger, R. Bird, A. Bouvier, J. H. Buckley, V. Bugaev, M. Cerruti, Xuhui Chen, L. Ciupik, 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, G. H. Gillanders, E. V. Gotthelf, S. Griffin, S. T. Griffiths, J. Grube, G. Gyuk, D. Hanna, J. Holder, G. Hughes, T. B. Humensky, C. A. Johnson, P. Kaaret, O. Kargaltsev, M. Kertzman, Y. Khassen, D. Kieda, F. Krennrich, M. J. Lang, A. S. Madhavan, G. Maier, S. McArthur, A. McCann, 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, L. C. Reyes, P. T. Reynolds, G. T. Richards, E. Roache, M. Roberts, G. H. Sembroski, K. Shahinyan, A. W. Smith, D. Staszak, Igor O. TelezhinskyORCiD, J. V. Tucci, J. Tyler, S. Vincent, S. P. Wakely, A. Weinstein, R. Welsing, Alina WilhelmORCiDGND, D. A. Williams, B. Zitzer |
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DOI: | https://doi.org/10.1088/0004-637X/788/1/78 |
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ISSN: | 0004-637X |
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ISSN: | 1538-4357 |
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Title of parent work (English): | The astrophysical journal : an international review of spectroscopy and astronomical physics |
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Publisher: | IOP Publ. Ltd. |
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Place of publishing: | Bristol |
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Publication type: | Article |
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Language: | English |
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Year of first publication: | 2014 |
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Publication year: | 2014 |
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Release date: | 2017/03/27 |
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Tag: | gamma rays : stars; pulsars : individual (PSR J2021+3651); supernovae : individual (CTB 87) |
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Volume: | 788 |
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Issue: | 1 |
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Number of pages: | 10 |
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Funding institution: | U.S. Department of Energy Office of Science; U.S. National Science
Foundation; Smithsonian Institution; NSERC in Canada; Science Foundation
Ireland [SFI 10/RFP/AST2748]; STFC in the U. K; ESA Member States and
NASA; Natural Sciences and Engineering Research Council |
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Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie |
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Peer review: | Referiert |
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