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dc.contributor.authorConnolly, M.P.
dc.contributor.authorGillanders, Gary
dc.contributor.authorLang, Mark
dc.identifier.citationArchambault, S,Archer, A,Aune, T,Barnacka, A,Benbow, W,Bird, R,Buchovecky, M,Buckley, JH,Bugaev, V,Byrum, K,Cardenzana, JV,Cerruti, M,Chen, X,Ciupik, L,Collins-Hughes, E,Connolly, MP,Cui, W,Dickinson, HJ,Dumm, J,Eisch, JD,Falcone, A,Feng, Q,Finley, JP,Fleischhack, H,Flinders, A,Fortin, P,Fortson, L,Furniss, A,Gillanders, GH,Griffin, S,Grube, J,Gyuk, G,Hutten, M,Hakansson, N,Hanna, D,Holder, J,Humensky, TB,Johnson, CA,Kaaret, P,Kar, P,Kelley-Hoskins, N,Kertzman, M,Khassen, Y,Kieda, D,Krause, M,Krennrich, F,Kumar, S,Lang, MJ,Maier, G,McArthur, S,McCann, A,Meagher, K,Millis, J,Moriarty, P,Mukherjee, R,Nieto, D,O'Brien, S,de Bhroithe, AO,Ong, RA,Otte, AN,Pandel, D,Park, N,Pelassa, V,Pohl, M,Popkow, A,Pueschel, E,Quinn, J,Ragan, K,Reynolds, PT,Richards, GT,Roache, E,Rousselle, J,Rulten, C,Sant (2016) 'EXCEPTIONALLY BRIGHT TEV FLARES FROM THE BINARY LS I+61 degrees 303'. Astrophysical Journal Letters, 817 .en_IE
dc.description.abstractThe TeV binary system LS I +61 degrees 303 is known for its regular, non-thermal emission pattern that traces the orbital period of the compact object in its 26.5 day orbit around its B0 Ve star companion. The system typically presents elevated TeV emission around apastron passage with flux levels between 5% and 15% of the steady flux from the Crab Nebula (> 300 GeV). In this article, VERITAS observations of LS I + 61 degrees. 303 taken in late 2014 are presented, during which bright TeV flares around apastron at flux levels peaking above 30% of the Crab Nebula flux were detected. This is the brightest such activity from this source ever seen in the TeV regime. The strong outbursts have rise and fall times of less than a day. The short timescale of the flares, in conjunction with the observation of 10 TeV photons from LS I + 61 degrees 303 during the flares, provides constraints on the properties of the accelerator in the source.en_IE
dc.description.sponsorshipThis research is supported by grants from the U.S. Department of Energy Office of Science, the U.S. National Science Foundation and the Smithsonian Institution, and by NSERC in Canada.en_IE
dc.publisherIOP Publishingen_IE
dc.relation.ispartofAstrophysical Journal Lettersen
dc.subjectX-rays: binariesen_IE
dc.subjectBinaries: generalen_IE
dc.subjectGamma-rays: generalen_IE
dc.subjectStars: individual (LS I+61 degrees 303, VER J0240+612)en_IE
dc.subjectGamma ray binariesen_IE
dc.titleExceptionally bright TEV flares from the binary LS I+61 degrees 303en_IE
dc.local.contactMark Lang, School Of Physics, Room 147, Arts/Science Building, Nui Galway. 3241 Email:

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