Gamma-ray Observations of Tycho's Supernova Remnant with VERITAS and Fermi

dc.contributor.authorArchambault, S.
dc.contributor.authorArcher, A.
dc.contributor.authorBenbow, W.
dc.contributor.authorBird, R.
dc.contributor.authorBourbeau, E.
dc.contributor.authorBuchovecky, M.
dc.contributor.authorBuckley, J. H.
dc.contributor.authorBugaev, V.
dc.contributor.authorCerruti, M.
dc.contributor.authorConnolly, M. P.
dc.contributor.authorCui, W.
dc.contributor.authorDwarkadas, V. V.
dc.contributor.authorErrando, M.
dc.contributor.authorFalcone, A.
dc.contributor.authorFeng, Q.
dc.contributor.authorFinley, J. P.
dc.contributor.authorFleischhack, H.
dc.contributor.authorFortson, L.
dc.contributor.authorFurniss, A.
dc.contributor.authorGriffin, S.
dc.contributor.authorHuetten, M.
dc.contributor.authorHanna, D.
dc.contributor.authorHolder, J.
dc.contributor.authorJohnson, C. A.
dc.contributor.authorKaaret, P.
dc.contributor.authorKar, P.
dc.contributor.authorKelley-Hoskins, N.
dc.contributor.authorKertzman, M.
dc.contributor.authorKieda, D.
dc.contributor.authorKrause, M.
dc.contributor.authorKumar, S.
dc.contributor.authorLang, M. J.
dc.contributor.authorMaier, G.
dc.contributor.authorMcArthur, S.
dc.contributor.authorMcCann, A.
dc.contributor.authorMoriarty, P.
dc.contributor.authorMukherjee, R.
dc.contributor.authorNieto, D.
dc.contributor.authorO'Brien, S.
dc.contributor.authorOng, R. A.
dc.contributor.authorOtte, A. N.
dc.contributor.authorPark, N.
dc.contributor.authorPohl, M.
dc.contributor.authorPopkow, A.
dc.contributor.authorPueschel, E.
dc.contributor.authorQuinn, J.
dc.contributor.authorRagan, K.
dc.contributor.authorReynolds, P. T.
dc.contributor.authorRichards, G. T.
dc.contributor.authorRoache, E.
dc.contributor.authorSadeh, I.
dc.contributor.authorSantander, M.
dc.contributor.authorSembroski, G. H.
dc.contributor.authorShahinyan, K.
dc.contributor.authorSlane, P.
dc.contributor.authorStaszak, D.
dc.contributor.authorTelezhinsky, I.
dc.contributor.authorTrepanier, S.
dc.contributor.authorTyler, J.
dc.contributor.authorWakely, S. P.
dc.contributor.authorWeinstein, A.
dc.contributor.authorWeisgarber, T.
dc.contributor.authorWilcox, P.
dc.contributor.authorWilhelm, A.
dc.contributor.authorWilliams, D. A.
dc.contributor.authorZitzer, B.
dc.contributor.otherMcGill University
dc.contributor.otherWashington University (WUSTL)
dc.contributor.otherHarvard University
dc.contributor.otherSmithsonian Institution
dc.contributor.otherUniversity of California System
dc.contributor.otherUniversity of California Los Angeles
dc.contributor.otherOllscoil na Gaillimhe-University of Galway
dc.contributor.otherPurdue University System
dc.contributor.otherPurdue University
dc.contributor.otherPurdue University West Lafayette Campus
dc.contributor.otherTsinghua University
dc.contributor.otherUniversity of Chicago
dc.contributor.otherPennsylvania Commonwealth System of Higher Education (PCSHE)
dc.contributor.otherPennsylvania State University
dc.contributor.otherPennsylvania State University - University Park
dc.contributor.otherUniversity of Potsdam
dc.contributor.otherUniversity College Dublin
dc.contributor.otherCork Institute of Technology
dc.contributor.otherSmithsonian Astrophysical Observatory
dc.contributor.otherIowa State University
dc.contributor.otherUniversity of Wisconsin System
dc.contributor.otherUniversity of Wisconsin Madison
dc.contributor.otherUniversity of Iowa
dc.contributor.otherUtah System of Higher Education
dc.contributor.otherUniversity of Utah
dc.contributor.otherDePauw University
dc.contributor.otherColumbia University
dc.contributor.otherUniversity System of Georgia
dc.contributor.otherGeorgia Institute of Technology
dc.contributor.otherUniversity of Alabama Tuscaloosa
dc.date.accessioned2019-06-17T19:39:45Z
dc.date.available2019-06-17T19:39:45Z
dc.date.issued2017-02-06
dc.description.abstractHigh-energy gamma-ray emission from supernova remnants (SNRs) has provided a unique perspective for studies of Galactic cosmic-ray acceleration. Tycho's SNR is a particularly good target because it is a young, type Ia SNR that has been. well-studied over a wide range of energies and located in a relatively clean environment. Since the detection of gamma-ray emission from Tycho's SNR by VERITAS and Fermi-LAT, there have been several theoretical models proposed to explain its broadband emission and high-energy morphology. We report on an update to the gamma-ray measurements of Tycho's SNR with 147 hr of VERITAS and 84 months of Fermi-LAT observations, which represent about a factor of two increase in exposure over previously published data. About half of the VERITAS data benefited from a camera upgrade, which has made it possible to extend the TeV measurements toward lower energies. The TeV spectral index measured by VERITAS is consistent with previous results, but the expanded energy range softens a straight power-law fit. At energies higher than 400GeV, the power-law index is 2.92 +/- 0.42(stat) +/- 0.20(sys). It is also softer than the spectral index in the GeV energy range, 2.14 +/- 0.09(stat) +/- 0.02(sys), measured in this study using Fermi-LAT data. The centroid position of the gamma-ray emission is coincident with the center of the remnant, as well as with the centroid measurement of Fermi-LAT above 1 GeV. The results are consistent with an SNR shell origin of the emission, as many models assume. The updated spectrum points to a lower maximum particle energy than has been suggested previously.en_US
dc.format.mimetypeapplication/pdf
dc.identifier.citationArchambault, S., et al. (2017): Gamma-Ray Observations of Tycho's Supernova Remnant with VERITAS and Fermi. The Astrophysical Journal, 836(1). DOI: http://dx.doi.org/10.3847/1538-4357/836/1/23
dc.identifier.doi10.3847/1538-4357/836/1/23
dc.identifier.orcidhttps://orcid.org/0000-0001-7891-699X
dc.identifier.orcidhttps://orcid.org/0000-0002-2126-2419
dc.identifier.orcidhttps://orcid.org/0000-0003-3343-0755
dc.identifier.orcidhttps://orcid.org/0000-0002-5955-6383
dc.identifier.orcidhttps://orcid.org/0000-0002-6324-5772
dc.identifier.orcidhttps://orcid.org/0000-0001-6674-4238
dc.identifier.orcidhttps://orcid.org/0000-0001-7861-1707
dc.identifier.orcidhttps://orcid.org/0000-0002-5221-6669
dc.identifier.orcidhttps://orcid.org/0000-0001-7595-0914
dc.identifier.orcidhttps://orcid.org/0000-0002-2133-5251
dc.identifier.orcidhttps://orcid.org/0000-0003-2098-170X
dc.identifier.orcidhttps://orcid.org/0000-0002-1067-8558
dc.identifier.orcidhttps://orcid.org/0000-0001-7297-8217
dc.identifier.orcidhttps://orcid.org/0000-0001-9868-4700
dc.identifier.orcidhttps://orcid.org/0000-0002-4837-5253
dc.identifier.orcidhttps://orcid.org/0000-0003-1387-8915
dc.identifier.orcidhttps://orcid.org/0000-0002-6986-6756
dc.identifier.orcidhttps://orcid.org/0000-0002-0794-8780
dc.identifier.orcidhttps://orcid.org/0000-0002-5167-1221
dc.identifier.orcidhttps://orcid.org/0000-0002-4596-8563
dc.identifier.orcidhttps://orcid.org/0000-0003-4641-4201
dc.identifier.orcidhttps://orcid.org/0000-0002-4855-2694
dc.identifier.orcidhttps://orcid.org/0000-0003-4785-0101
dc.identifier.urihttp://ir.ua.edu/handle/123456789/5774
dc.languageEnglish
dc.language.isoen_US
dc.publisherIOP Publishing
dc.subjectgamma rays
dc.subjectstars-supernovae
dc.subjectindividual(Tycho's SNR) Supporting material
dc.subjectdata behind figure
dc.subjectCOSMIC-RAYS
dc.subjectPARTICLE-ACCELERATION
dc.subjectSHOCK ACCELERATION
dc.subjectMAGNETIC-FIELD
dc.subjectEMISSION
dc.subjectELECTRONS
dc.subjectFILAMENTS
dc.subjectENERGIES
dc.subjectIA
dc.subjectAstronomy & Astrophysics
dc.titleGamma-ray Observations of Tycho's Supernova Remnant with VERITAS and Fermien_US
dc.typetext
dc.typeArticle
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