Evidence for TeV gamma-ray emission from a region of the galactic plane

被引：76
|
作者：
Atkins, R
Benbow, W
Berley, D
Blaufuss, E
Coyne, DG
DeYoung, T
Dingus, BL
Dorfan, DE
Ellsworth, RW
Fleysher, L
Fleysher, R
Gisler, G
Gonzalez, MM
Goodman, JA
Haines, TJ
Hays, E
Hoffman, CM
Kelley, LA
Lansdell, CP
Linnemann, JT
McEnery, JE
Miller, RS
Mincer, AI
Morales, MF
Nemethy, P
Noyes, D
Ryan, JM
Samuelson, FW
Parkinson, PMS
Shoup, A
Sinnis, G
Smith, AJ
Sullivan, GW
Williams, DA
Wilson, ME
Xu, XW
Yodh, GB
机构：
[1] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA
[2] Univ Calif Santa Cruz, Santa Cruz Inst Particle Phys, Santa Cruz, CA 95064 USA
[3] Univ Maryland, Dept Phys, College Pk, MD 20742 USA
[4] Los Alamos Natl Lab, Grp P 23, Los Alamos, NM 87545 USA
[5] George Mason Univ, Dept Phys & Astron, Fairfax, VA 22030 USA
[6] NYU, Dept Phys, New York, NY 10003 USA
[7] Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA
[8] Univ New Hampshire, Dept Phys, Durham, NH 03824 USA
[9] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA
来源：
PHYSICAL REVIEW LETTERS | 2005年 / 95卷 / 25期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1103/PhysRevLett.95.251103
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
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 is an element of(40 degrees,100 degrees) and latitude parallel to b parallel to < 5 degrees. Under the assumption of a simple power law spectrum, with no cutoff in the EGRET-Milagro energy range, the measured integral flux is phi(gamma)(> 3.5 TeV)=(6.4 +/- 1.4 +/- 2.1)x10(-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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页数：5
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