Very high energy gamma rays from the composite SNR G0.9+0.1

Aharonian, F; Akhperjanian, AG; Aye, KM; Bazer-Bachi, AR; Beilicke, M; Benbow, W; Berge, D; Berghaus, P; Bernlohr, K; Boisson, C; Bolz, O; Borgmeier, C; Braun, I; Breitling, F; Brown, AM; Gordo, JB; Chadwick, PM; Chounet, LM; Cornils, R; Costamante, L; Degrange, B; Djannati-Atai, A; Drury, LO; Dubus, G; Ergin, TÜLÜN; Espigat, P; Feinstein, F; Fleury, P; Fontaine, G; Funk, S; Gallant, YA; Giebels, B; Gillessen, S; Goret, P; Hadjichristidis, C; Hauser, M; Heinzelmann, G; Henri, G; Hermann, G; Hinton, JA; Hofmann, W; Holleran, M; Horns, D; de Jager, OC; Jung, I; Khelifi, B; Komin, N; Konopelko, A; Latham, IJ; Le Gallou, R; Lemiere, A; Lemoine, M; Leroy, N; Lohse, T; Marcowith, A; Masterson, C; McComb, TJL; de Naurois, M; Nolan, SJ; Noutsos, A; Orford, KJ; Osborne, JL; Ouchrif, M; Panter, M; Pelletier, G; Pita, S; Puhlhofer, G; Punch, M; Raubenheimer, BC; Raue, M; Raux, J; Rayner, SM; Redondo, I; Reimer, A; Reimer, O; Ripken, J; Rob, L; Rolland, L; Rowell, G; Sahakian, V; Sauge, L; Schlenker, S; Schlickeiser, R; Schuster, C; Schwanke, U; Siewert, M; Sol, H; Steenkamp, R; Stegmann, C; Tavernet, JP; Terrier, R; Theoret, CG; Tluczykont, M; Vasileiadis, G; Venter, C; Vincent, P; Visser, B; Volk, HJ; Wagner, SJ

doi:10.1051/0004-6361:200500022

Very high energy gamma rays from the composite SNR G0.9+0.1

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Aharonian F., Akhperjanian A., Aye K., Bazer-Bachi A., Beilicke M., Benbow W., ...More

ASTRONOMY & ASTROPHYSICS, vol.432, no.2, 2005 (SCI-Expanded)

Publication Type: Article / Article
Volume: 432 Issue: 2
Publication Date: 2005
Doi Number: 10.1051/0004-6361:200500022
Journal Name: ASTRONOMY & ASTROPHYSICS
Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
Keywords: ISM : supernova remnants, ISM : individual objects : G0.9+0.1, gamma-rays : observations, PULSAR WIND NEBULA, GALACTIC-CENTER, SYSTEM
Middle East Technical University Affiliated: Yes

Abstract

Very high energy (> 100 GeV) gamma-ray emission has been detected for the first time from the composite supernova remnant G0.9+ 0.1 using the HESS instrument. The source is detected with a significance of approximate to 13sigma, and a photon flux above 200 GeV of ( 5.7 +/- 0.7(stat) +/- 1.2(sys)) x 10(-12) cm(-2) s(-1), making it one of the weakest sources ever detected at TeV energies. The photon spectrum is compatible with a power law ( dN/dE proportional to E-Gamma) with photon index Gamma = 2.40 +/- 0.11(stat) +/- 0.20(sys). The gamma-ray emission appears to originate in the plerionic core of the remnant, rather than the shell, and can be plausibly explained as inverse Compton scattering of relativistic electrons.