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OBSERVATION OF TeV GAMMA RAYS FROM THE UNIDENTIFIED SOURCE HESS J1841-055 WITH THE ARGO-YBJ EXPERIMENT
ARGO-YBJ Collaboration
2013
发表期刊ASTROPHYSICAL JOURNAL
卷号767期号:2
通讯作者Bartoli, B (reprint author), Univ Naples Federico II, Dipartimento Fis, Complesso Univ Monte St Angelo,Via Cinthia, I-80126 Naples, Italy.
摘要We report the observation of a very high energy gamma-ray source whose position is coincident with HESS J1841-055. This source has been observed for 4.5 years by the ARGO-YBJ experiment from 2007 November to 2012 July. Its emission is detected with a statistical significance of 5.3 standard deviations. Parameterizing the source shape with a two-dimensional Gaussian function, we estimate an extension sigma = (0.40(-0.22)(+0.32))degrees, which is consistent with the HESS measurement. The observed energy spectrum is dN/dE = (9.0 +/- 1.6) x 10(-13)(E/5 TeV)(-2.32 +/- 0.23) photons cm(-2) s(-1) TeV-1, in the energy range 0.9-50 TeV. The integral gamma-ray flux above 1 TeV is 1.3 +/- 0.4 Crab, which is 3.2 +/- 1.0 times the flux derived by HESS. The differences in the flux determination between HESS and ARGO-YBJ and possible counterparts at other wavelengths are discussed.
关键词CYGNUS REGION DETECTOR CALIBRATION EMISSION
学科领域Astronomy & Astrophysics
DOI10.1088/0004-637X/767/2/99
收录类别SCI
语种英语
WOS类目Astronomy & Astrophysics
WOS记录号WOS:000317346800002
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被引频次:18[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/213507
专题粒子天体物理中心
作者单位中国科学院高能物理研究所
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ARGO-YBJ Collaboration. OBSERVATION OF TeV GAMMA RAYS FROM THE UNIDENTIFIED SOURCE HESS J1841-055 WITH THE ARGO-YBJ EXPERIMENT[J]. ASTROPHYSICAL JOURNAL,2013,767(2).
APA ARGO-YBJ Collaboration.(2013).OBSERVATION OF TeV GAMMA RAYS FROM THE UNIDENTIFIED SOURCE HESS J1841-055 WITH THE ARGO-YBJ EXPERIMENT.ASTROPHYSICAL JOURNAL,767(2).
MLA ARGO-YBJ Collaboration."OBSERVATION OF TeV GAMMA RAYS FROM THE UNIDENTIFIED SOURCE HESS J1841-055 WITH THE ARGO-YBJ EXPERIMENT".ASTROPHYSICAL JOURNAL 767.2(2013).
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