Observation of TeV gamma rays from the Cygnus region with the ARGO-YBJ experiment

B. Bartoli, P. Bernardini,X. J. Bi,C. Bleve,I. Bolognino,P. Branchini,A. Budano,A. K. Calabrese Melcarne,P. Camarri,Z. Cao,R. Cardarelli,S. Catalanotti,C. Cattaneo,S. Z. Chen,T. L. Chen,Y. Chen, P. Creti,S. W. Cui,B. Z. Dai,G. D'Alí Staiti, Danzengluobu,M. Dattoli,I. De Mitri,B. D'Ettorre Piazzoli,T. Di Girolamo,X. H. Ding,G. Di Sciascio,C. F. Feng,Zhaoyang Feng,Zhenyong Feng,F. Galeazzi,E. Giroletti,Q. B. Gou,Y. Q. Guo,H. H. He, Haibing Hu,Hongbo Hu,Q. Huang,M. Iacovacci,R. Iuppa,I. James,H. Y. Jia, Labaciren,H. J. Li,J. Y. Li, X. X. Li,G. Liguori,C. Liu,C. Q. Liu,J. Liu,M. Y. Liu,H. Lu,L. L. Ma,X. H. Ma, G. Mancarella,S. M. Mari,G. Marsella, D. Martello,S. Mastroianni,P. Montini,C. C. Ning,A. Pagliaro,M. Panareo,B. Panico,L. Perrone, P. Pistilli,F. Ruggieri,P. Salvini,R. Santonico,P. R. Shen, X. D. Sheng,F. Shi,C. Stanescu,A. Surdo,Y. H. Tan,P. Vallania,S. Vernetto,C. Vigorito,B. Wang,H. Wang,C. Y. Wu,H. R. Wu,B. Xu,L. Xue,Q. Y. Yang, X. C. Yang,Z. G. Yao,A. F. Yuan,M. Zha,H. M. Zhang,Jilong Zhang,Jianli Zhang,L. Zhang,P. Zhang,X. Y. Zhang,Y. Zhang,J. Zhao, Zhaxiciren, Zhaxisangzhu,X. X. Zhou, F. R. Zhu,Q. Q. Zhu, G. Zizzi

The astrophysical journal（2012）

引用 61|浏览82

暂无评分

摘要

We report the observation of TeV gamma-rays from the Cygnus region using the ARGO-YBJ data collected from 2007 November to 2011 August. Several TeV sources are located in this region including the two bright extended MGRO J2019+37 and MGRO J2031+41. According to the Milagro data set, at 20 TeV MGRO J2019+37 is the most significant source apart from the Crab Nebula. No signal from MGRO J2019+37 is detected by the ARGO-YBJ experiment, and the derived flux upper limits at 90% confidence level for all the events above 600 GeV with medium energy of 3 TeV are lower than the Milagro flux, implying that the source might be variable and hard to be identified as a pulsar wind nebula. The only statistically significant (6.4 standard deviations) gamma-ray signal is found from MGRO J2031+41, with a flux consistent with the measurement by Milagro.

查看译文

关键词

gamma rays: general,pulsars: individual (MGRO J2019+37, MGRO J2031+41)

AI 理解论文

溯源树

样例

生成溯源树，研究论文发展脉络

Chat Paper

正在生成论文摘要