作者
R Atkins, W Benbow, D Berley, E Blaufuss, DG Coyne, T DeYoung, BL Dingus, DE Dorfan, RW Ellsworth, L Fleysher, R Fleysher, G Gisler, MM Gonzalez, JA Goodman, TJ Haines, E Hays, CM Hoffman, LA Kelley, CP Lansdell, JT Linnemann, JE McEnery, RS Miller, AI Mincer, MF Morales, P Nemethy, D Noyes, JM Ryan, FW Samuelson, PM Saz Parkinson, A Shoup, G Sinnis, AJ Smith, GW Sullivan, DA Williams, ME Wilson, XW Xu, GB Yodh
发表日期
2005/12/16
期刊
Physical Review Letters
卷号
95
期号
25
页码范围
251103
出版商
American Physical Society
简介
Gamma-ray emission from a narrow band at the galactic equator has previously been detected up to 30 GeV. We report evidence for a TeV gamma-ray signal from a region of the galactic plane by Milagro, a large-field-of-view water Cherenkov detector for extensive air showers. An excess with a significance of 4.5 standard deviations has been observed from the region of galactic longitude l∈(40, 100) and latitude| b|< 5. Under the assumption of a simple power law spectrum, with no cutoff in the EGRET-Milagro energy range, the measured integral flux is ϕ γ (> 3.5 TeV)=(6.4±1.4±2.1)× 10− 11 cm− 2 s− 1 sr− 1. This flux is consistent with an extrapolation of the EGRET spectrum between 1 and 30 GeV in this galactic region.
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R Atkins, W Benbow, D Berley, E Blaufuss, DG Coyne… - Physical Review Letters, 2005