arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 0905.3139astro-ph.HE
收藏

来自未识别TeV源HESS J0632 +057的长期Gamma-ray和X射线变异性的证据

Evidence for long-term Gamma-ray and X-ray variability from the unidentified TeV source HESS J0632+057

VERITAS Collaboration, V. A. Acciari, E. Aliu, T. Arlen, M. Beilicke, W. Benbow, D. Boltuch, S. M. Bradbury, J. H. Buckley, V. Bugaev, K. Byrum, A. Cannon, A. C… 展开作者

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

摘要:

HESS J 0632 +057是仅有的两个未经确认的甚高能量伽马射线源之一,在实验分辨率内看起来像点状的。它可能与大质量Be星MWC 148有关,并被认为类似于已知的TeV双星系统,如LS I +61 303或LS 5039。2006年、2008年和2009年,VERITAS对HESS J 0632 +057进行了31小时的观测。在这些观测中,没有从HESS J 0632 +057方向检测到能量超过1 TeV的伽马射线的显著信号。从VERITAS数据中得出的流量上限相当于蟹状星云流量的1.1%。VERITAS的未检测排除了HESS J 0632 +057是稳定伽马射线发射体的可能性为99.993%。同时用Swift XRT进行的X射线观测显示,在1-10 keV范围内,通量比HESS J 0632 +057早期的X射线观测高1.8+-0.4倍。伽马射线和X射线通量的变化支持将该天体解释为伽马射线发射双星。

英文摘要:

HESS J0632+057 is one of only two unidentified very-high-energy gamma-ray sources which appear to be point-like within experimental resolution. It is possibly associated with the massive Be star MWC 148 and has been suggested to resemble known TeV binary systems like LS I +61 303 or LS 5039. HESS J0632+057 was observed by VERITAS for 31 hours in 2006, 2008 and 2009. During these observations, no significant signal in gamma rays with energies above 1 TeV was detected from the direction of HESS J0632+057. A flux upper limit corresponding to 1.1% of the flux of the Crab Nebula has been derived from the VERITAS data. The non-detection by VERITAS excludes with a probability of 99.993% that HESS J0632+057 is a steady gamma-ray emitter. Contemporaneous X-ray observations with Swift XRT reveal a factor of 1.8+-0.4 higher flux in the 1-10 keV range than earlier X-ray observations of HESS J0632+057. The variability in the gamma-ray and X-ray fluxes supports interpretation of the ob ject as a gamma-ray emitting binary.

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。

↑