DETECTION OF EXTENDED VHE GAMMA RAY EMISSION FROM G106.3+2.7 WITH VERITAS

Acciari, V.; Aliu, E.; Arlen, T.; Aune, T.; Bautista, M.; Beilicke, M.; Benbow, W.; Boltuch, D.; Bradbury, S.; Buckley, J.; Bugaev, V.; Butt, Y.; Byrum, K.; Cannon, A.; Cesarini, A.; Chow, Y.; Ciupik, L.; Cogan, P.; Cui, W.; Dickherber, R.; Ergin, TÜLÜN; Fegan, S.; Finley, J.; Fortin, P.; Fortson, L.; Furniss, A.; Gall, D.; Gillanders, G.; Gotthelf, E.; Grube, J.; Guenette, R.; Gyuk, G.; Hanna, D.; Holder, J.; Horan, D.; Hui, C.; Humensky, T.; Kaaret, P.; Karlsson, N.; Kertzman, M.; Kieda, D.; Konopelko, A.; Krawczynski, H.; Krennrich, F.; Lang, M.; LeBohec, S.; Maier, G.; McCann, A.; McCutcheon, M.; Millis, J.; Moriarty, P.; Mukherjee, R.; 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.; 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/703/1/l6

DETECTION OF EXTENDED VHE GAMMA RAY EMISSION FROM G106.3+2.7 WITH VERITAS

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

ASTROPHYSICAL JOURNAL LETTERS, vol.703, no.1, 2009 (SCI-Expanded)

Publication Type: Article / Article
Volume: 703 Issue: 1
Publication Date: 2009
Doi Number: 10.1088/0004-637x/703/1/l6
Journal Name: ASTROPHYSICAL JOURNAL LETTERS
Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
Keywords: gamma rays: observations, ISM: individual (G106.3+2.7=VER J2227+608), pulsars: individual (J2229+6114), supernova remnants, PULSAR WIND NEBULAE, SOURCE 3EG J2227+6122, GALACTIC-PLANE SURVEY, SUPERNOVA REMNANT, MOLECULAR CLOUDS, SOURCE LIST, TELESCOPE, DISCOVERY, ASTRONOMY, FIELD
Middle East Technical University Affiliated: No

Abstract

We report the detection of very-high-energy (VHE) gamma-ray emission from supernova remnant (SNR) G106.3+2.7. Observations performed in 2008 with the VERITAS atmospheric Cherenkov gamma-ray telescope resolve extended emission overlapping the elongated radio SNR. The 7.3 sigma (pre-trials) detection has a full angular extent of roughly 0 degrees.6 by 0 degrees.4. Most notably, the centroid of the VHE emission is centered near the peak of the coincident (CO)-C-12 (J = 1-0) emission, 0 degrees.4 away from the pulsar PSR J2229+6114, situated at the northern end of the SNR. Evidently the current-epoch particles from the pulsar wind nebula are not participating in the gamma-ray production. The VHE energy spectrum measured with VERITAS is well characterized by a power law dN/dE = N-0(E/3 TeV)(-Gamma) with a differential index of Gamma = 2.29 +/- 0.33(stat) +/- 0.30(sys) and a flux of N-0 = (1.15 +/- 0.27(stat) +/- 0.35(sys)) x 10(-13) cm(-2) s(-1) TeV-1. The integral flux above 1 TeV corresponds to similar to 5 percent of the steady Crab Nebula emission above the same energy. We describe the observations and analysis of the object and briefly discuss the implications of the detection in a multiwavelength context.