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arXiv 1204.0865astro-ph.HE
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Blazar RBS 0413高能和甚高能Gamma-ray辐射的发现

Discovery of High-energy and Very High Energy Gamma-ray Emission from the Blazar RBS 0413

VERITAS Collaboration, E. Aliu, S. Archambault, T. Arlen, T. Aune, M. Beilicke, W. Benbow, M. Boettcher, A. Bouvier, S. M. Bradbury, J. H. Buckley, V. Bugaev, K… 展开作者

VERITAS Collaboration, E. Aliu, S. Archambault, T. Arlen, T. Aune, M. Beilicke, W. Benbow, M. Boettcher, A. Bouvier, S. M. Bradbury, J. H. Buckley, V. Bugaev, K. Byrum, A. Cannon, A. Cesarini, L. Ciupik, E. Collins-Hughes, M. P. Connolly, P. Coppi, W. Cui, G. Decerprit, R. Dickherber, J. Dumm, M. Errando, A. Falcone, Q. Feng, J. P. Finley, G. Finnegan, L. Fortson, A. Furniss, N. Galante, D. Gall, S. Godambe, S. Griffin, J. Grube, G. Gyuk, D. Hanna, K. Hawkins, J. Holder, H. Huan, G. Hughes, T. B. Humensky, P. Kaaret, N. Karlsson, M. Kertzman, Y. Khassen, D. Kieda, H. Krawczynski, F. Krennrich, M. J. Lang, K. Lee, A. S Madhavan, G. Maier, P. Majumdar, S. McArthur, A. McCann, P. Moriarty, R. Mukherjee, R. A. Ong, M. Orr, A. N. Otte, N. Palma, N. Park, J. S. Perkins, A. Pichel, M. Pohl, H. Prokoph, J. Quinn, K. Ragan, L. C. Reyes, P. T. Reynolds, E. Roache, H. J. Rose, J. Ruppel, D. B. Saxon, M. Schroedter, G. H. Sembroski, G. D. Senturk, A. W. Smith, D. Staszak, I. Telezhinsky, G. Tesic, M. Theiling, S. Thibadeau, K. Tsurusaki, A. Varlotta, M. Vivier, S. P. Wakely, J. E. Ward, T. C. Weekes, A. Weinstein, T. Weisgarber, D. A. Williams, B. Zitzer, P. Fortin, D. Horan

摘要:

我们报告的发现高能量(HE; E > 0.1 GeV)和非常高的能量(VHE; E > 100 GeV)的伽马射线发射的高频峰值BL Lac对象RBS 0413。VERITAS是一个地面伽马射线观测站,它探测到了RBS 0413的VHE伽马射线,其统计显著性为5.5标准差(sigma),伽马射线通量为(1.5 \pm 0.6 stat \pm 0.7 syst)\times 10^(-8)光子m^(-2)s^(-1)(\sim 1%的蟹状星云通量),能量超过250 GeV。观测到的光谱可用幂律描述,光子指数为3.18 \pm 0.68 stat \pm 0.30 syst。费米伽马射线太空望远镜上的大面积望远镜(LAT)的同期观测检测到来自RBS 0413的HE伽马射线,其统计学显著性超过9 σ,幂律光子指数为1.57 \pm 0.12stat +0.11sys -0.12sys,伽马射线通量在300 MeV和300 GeV之间,(1.64 \pm 0.43 stat +0.31 sys-0.22 sys)\times 10^(-5)光子m^(-2)s^(-1)。我们提出的结果从费米-LAT和VERITAS,包括伽玛射线,准同步X射线(Swift-XRT),紫外(Swift-UVOT)和R波段光学(MDM)数据的光谱能量分布建模。我们发现,如果需要接近均分的条件,同步自康普顿/外部康普顿和轻强子模型相结合的首选一个纯同步自康普顿模型。

英文摘要:

We report on the discovery of high-energy (HE; E > 0.1 GeV) and very high-energy (VHE; E > 100 GeV) gamma-ray emission from the high-frequency-peaked BL Lac object RBS 0413. VERITAS, a ground-based gamma-ray observatory, detected VHE gamma rays from RBS 0413 with a statistical significance of 5.5 standard deviations (sigma) and a gamma-ray flux of (1.5 \pm 0.6stat \pm 0.7syst) \times 10^(-8) photons m^(-2) s^(-1) (\sim 1% of the Crab Nebula flux) above 250 GeV. The observed spectrum can be described by a power law with a photon index of 3.18 \pm 0.68stat \pm 0.30syst. Contemporaneous observations with the Large Area Telescope (LAT) on the Fermi Gamma-ray Space Telescope detected HE gamma rays from RBS 0413 with a statistical significance of more than 9 sigma, a power-law photon index of 1.57 \pm 0.12stat +0.11sys -0.12sys and a gamma-ray flux between 300 MeV and 300 GeV of (1.64 \pm 0.43stat +0.31sys -0.22sys) \times 10^(-5) photons m^(-2) s^(-1). We present the results from Fermi-LAT and VERITAS, including a spectral energy distribution modeling of the gamma-ray, quasi-simultaneous X-ray (Swift-XRT), ultraviolet (Swift-UVOT) and R-band optical (MDM) data. We find that, if conditions close to equipartition are required, both the combined synchrotron self-Compton/external-Compton and the lepto-hadronic models are preferred over a pure synchrotron self-Compton model.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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