{"paper":{"title":"Discovery of a new TeV gamma-ray source: VER J0521+211","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.HE","authors_text":"A. Bouvier, A. B. Pushkarev, A. Cesarini, A. Falcone, A. Furniss, A. McCann, A. N. Otte, A. O'Faolain de Bhroithe, A. Popkow, A. S Madhavan, A. Varlotta, A. Weinstein, A. W. Smith, B. Zitzer, D. A. Williams, D. B. Saxon, D. Gall, D. Hanna, D. Kieda, D. Staszak, E. Roache, F. Krennrich, G. Gyuk, G. H. Gillanders, G. H. Sembroski, G. Hughes, G. Maier, G. T. Richards, H. Krawczynski, H. Prokoph, I. Telezhinsky, J. Grube, J. H. Buckley, J. Holder, J. Liu, J. Millis, J. P. Finley, J. P. Halpern, J. Quinn, J. S. Perkins, K. Byrum, K. Ragan, L. Ciupik, L. C. Reyes, L. Fortson, M. Beilicke, M. Bottcher, M. Errando, M. J. Lang, M. Kertzman, M. L. Lister, M. P. Connolly, M. Pohl, M. Theiling, N. Galante, N. Park, P. Fortin, P. Kaaret, P. Majumdar, P. Moriarty, P. S. Smith, P. T. Reynolds, Q. Feng, R. A. Ong, R. Bird, R. Mukherjee, R. Welsing, S. Federici, S. Griffin, S. J. Fegan, S. Kumar, S. McArthur, S. P. Wakely, S. Vincent, T. Arlen, T. Aune, T. B. Humensky, T. C. Weekes, V. Bugaev, VERITAS Collaboration: S. Archambault, V. V. Vassiliev, W. Benbow, W. Cui, Y. Khassen, Y. Y. Kovalev","submitted_at":"2013-08-22T23:28:28Z","abstract_excerpt":"We report the detection of a new TeV gamma-ray source, VER J0521+211, based on observations made with the VERITAS imaging atmospheric Cherenkov telescope array. These observations were motivated by the discovery of a cluster of >30GeV photons in the first year of Fermi-LAT observations. VER J0521+211 is relatively bright at TeV energies, with a mean photon flux of 1.93 +/- 0.13_stat +/- 0.78_sys 10^-11 cm-2 s-1 above 0.2 TeV during the period of the VERITAS observations. The source is strongly variable on a daily timescale across all wavebands, from optical to TeV, with a peak flux correspondi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1308.5017","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}