OBSERVATION OF EXTENDED VERY HIGH ENERGY EMISSION FROM THE SUPERNOVA REMNANT IC 443 WITH VERITAS

Acciari, V.; Aliu, E.; Arlen, T.; Aune, T.; Bautista, M.; Beilicke, M.; Benbow, W.; Bradbury, S.; Buckley, J.; Bugaev, V.; Butt, Y.; Byrum, K.; Cannon, A.; Celik, O.; Cesarini, A.; Chow, Y.; Ciupik, L.; Cogan, P.; Colin, P.; Cui, W.; Daniel, M.; Dickherber, R.; Duke, C.; Dwarkadas, V.; Ergin, TÜLÜN; Fegan, S.; Finley, J.; Finnegan, G.; Fortin, P.; Fortson, L.; Furniss, A.; Gall, D.; Gibbs, K.; Gillanders, G.; Godambe, S.; Grube, J.; Guenette, R.; Gyuk, G.; Hanna, D.; Hays, E.; Holder, J.; Horan, D.; Hui, C.; Humensky, T.; Imran, A.; Kaaret, P.; Karlsson, N.; Kertzman, M.; Kieda, D.; Kildea, J.; Konopelko, A.; Krawczynski, H.; Krennrich, F.; Lang, M.; LeBohec, S.; Maier, G.; McCann, A.; McCutcheon, M.; Millis, J.; Moriarty, P.; Ong, R.; Otte, A.; Pandel, D.; Perkins, J.; Pohl, M.; Quinn, J.; Ragan, K.; Reyes, L.; Reynolds, P.; Roache, E.; Rose, H.; Schroedter, M.; Sembroski, G.; Smith, A.; Steele, D.; Swordy, S.; Theiling, M.; Toner, J.; Valcarcel, L.; Varlotta, A.; Vassiliev, V.; Vincent, S.; Wagner, R.; Wakely, S.; Ward, J.; Weekes, T.; Weinstein, A.; Weisgarber, T.; Williams, D.; Wissel, S.; Wood, M.; Zitzer, B.

doi:10.1088/0004-637x/698/2/l133

OBSERVATION OF EXTENDED VERY HIGH ENERGY EMISSION FROM THE SUPERNOVA REMNANT IC 443 WITH VERITAS

Atıf İçin Kopyala

Acciari V. A., Aliu E., Arlen T., Aune T., Bautista M., Beilicke M., ...Daha Fazla

ASTROPHYSICAL JOURNAL LETTERS, cilt.698, sa.2, 2009 (SCI-Expanded)

Yayın Türü: Makale / Tam Makale
Cilt numarası: 698 Sayı: 2
Basım Tarihi: 2009
Doi Numarası: 10.1088/0004-637x/698/2/l133
Dergi Adı: ASTROPHYSICAL JOURNAL LETTERS
Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
Anahtar Kelimeler: gamma rays: observations, ISM: individual (IC 443=VER J0616.9+2230, = MAGIC J0616+225), GAMMA-RAY EMISSION, XMM-NEWTON OBSERVATIONS, MOLECULAR CLOUDS, MAGIC TELESCOPE, COSMIC-RAYS, IC-443, NEBULA, PULSAR, DISCOVERY, RADIATION
Orta Doğu Teknik Üniversitesi Adresli: Hayır

Özet

We present evidence that the very high energy (VHE, E > 100 GeV) gamma-ray emission coincident with the supernova remnant IC 443 is extended. IC 443 contains one of the best studied sites of supernova remnant/molecular cloud interaction and the pulsar wind nebula CXOU J061705.3+222127, both of which are important targets for VHE observations. VERITAS observed IC 443 for 37.9 hr during 2007 and detected emission above 300 GeV with an excess of 247 events, resulting in a significance of 8.3 standard deviations (sigma) before trials and 7.5 sigma after trials in a point-source search. The emission is centered at 6(h)16(m)51(s)+22 degrees 30'11 '' (J2000)+/- 0 degrees.03(stat)+/- 0 degrees.08(sys), with an intrinsic extension of 0 degrees.16 +/- 0 degrees.03(stat)+/- 0 degrees.04(sys). The VHE spectrum is well fit by a power law (dN/dE = N-0 x(E/TeV)(-Gamma)) with a photon index of 2.99 +/- 0.38(stat)+/- 0.3(sys) and an integral flux above 300 GeV of (4.63 +/- 0.90(stat)+/- 0.93(sys)) x 10(-12) cm(-2) s(-1). These results are discussed in the context of existing models for gamma-ray production in IC 443.