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

R. Atkins; W. Benbow; D. Berley; E. Blaufuss; D. G. Coyne; T. Deyoung; B. L. Dingus; D. E. Dorfan; R. W. Ellsworth; L. Fleysher; R. Fleysher; G. Gisler; M. M. Gonzalez; J. A. Goodman; T. J. Haines; E. Hays; C. M. Hoffman; L. A. Kelley; C. P. Lansdell; J. T. Linnemann; J. E. McEnery; R. S. Miller; A. I. Mincer; M. F. Morales; P. Nemethy; D. Noyes; J. M. Ryan; F. W. Samuelson; P. M.Saz Parkinson; A. Shoup; G. Sinnis; A. J. Smith; G. W. Sullivan; D. A. Williams; M. E. Wilson; X. W. Xu; G. B. Yodh

doi:10.1103/PhysRevLett.95.251103

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

R. Atkins, W. Benbow, D. Berley, E. Blaufuss, D. G. Coyne, T. Deyoung, B. L. Dingus, D. E. Dorfan, R. W. Ellsworth, L. Fleysher, R. Fleysher, G. Gisler, M. M. Gonzalez, J. A. Goodman, T. J. Haines, E. Hays, C. M. Hoffman, L. A. Kelley, C. P. Lansdell, J. T. LinnemannJ. E. McEnery, R. S. Miller, A. I. Mincer, M. F. Morales, P. Nemethy, D. Noyes, J. M. Ryan, F. W. Samuelson, P. M.Saz Parkinson, A. Shoup, G. Sinnis, A. J. Smith, G. W. Sullivan, D. A. Williams, M. E. Wilson, X. W. Xu, G. B. Yodh

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Abstract

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 γ(>3.5TeV)=(6.4±1. 4±2.1)×10-11cm-2s-1sr-1. This flux is consistent with an extrapolation of the EGRET spectrum between 1 and 30 GeV in this galactic region.

Original language	English (US)
Article number	251103
Journal	Physical Review Letters
Volume	95
Issue number	25
DOIs	https://doi.org/10.1103/PhysRevLett.95.251103
State	Published - Dec 16 2005
Externally published	Yes

ASJC Scopus subject areas

General Physics and Astronomy

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10.1103/PhysRevLett.95.251103

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Atkins, R., Benbow, W., Berley, D., Blaufuss, E., Coyne, D. G., Deyoung, T., Dingus, B. L., Dorfan, D. E., Ellsworth, R. W., Fleysher, L., Fleysher, R., Gisler, G., Gonzalez, M. M., Goodman, J. A., Haines, T. J., Hays, E., Hoffman, C. M., Kelley, L. A., Lansdell, C. P., ... Yodh, G. B. (2005). Evidence for TeV gamma-ray emission from a region of the galactic plane. Physical Review Letters, 95(25), Article 251103. https://doi.org/10.1103/PhysRevLett.95.251103

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 2005, 'Evidence for TeV gamma-ray emission from a region of the galactic plane', Physical Review Letters, vol. 95, no. 25, 251103. https://doi.org/10.1103/PhysRevLett.95.251103

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title = "Evidence for TeV gamma-ray emission from a region of the galactic plane",

abstract = "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 γ(>3.5TeV)=(6.4±1. 4±2.1)×10-11cm-2s-1sr-1. This flux is consistent with an extrapolation of the EGRET spectrum between 1 and 30 GeV in this galactic region.",

author = "R. Atkins and W. Benbow and D. Berley and E. Blaufuss and Coyne, {D. G.} and T. Deyoung and Dingus, {B. L.} and Dorfan, {D. E.} and Ellsworth, {R. W.} and L. Fleysher and R. Fleysher and G. Gisler and Gonzalez, {M. M.} and Goodman, {J. A.} and Haines, {T. J.} and E. Hays and Hoffman, {C. M.} and Kelley, {L. A.} and Lansdell, {C. P.} and Linnemann, {J. T.} and McEnery, {J. E.} and Miller, {R. S.} and Mincer, {A. I.} and Morales, {M. F.} and P. Nemethy and D. Noyes and Ryan, {J. M.} and Samuelson, {F. W.} and Parkinson, {P. M.Saz} and A. Shoup and G. Sinnis and Smith, {A. J.} and Sullivan, {G. W.} and Williams, {D. A.} and Wilson, {M. E.} and Xu, {X. W.} and Yodh, {G. B.}",

year = "2005",

month = dec,

day = "16",

doi = "10.1103/PhysRevLett.95.251103",

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AU - Atkins, R.

AU - Benbow, W.

AU - Berley, D.

AU - Blaufuss, E.

AU - Coyne, D. G.

AU - Deyoung, T.

AU - Dingus, B. L.

AU - Dorfan, D. E.

AU - Ellsworth, R. W.

AU - Fleysher, L.

AU - Fleysher, R.

AU - Gisler, G.

AU - Gonzalez, M. M.

AU - Goodman, J. A.

AU - Haines, T. J.

AU - Hays, E.

AU - Hoffman, C. M.

AU - Kelley, L. A.

AU - Lansdell, C. P.

AU - Linnemann, J. T.

AU - McEnery, J. E.

AU - Miller, R. S.

AU - Mincer, A. I.

AU - Morales, M. F.

AU - Nemethy, P.

AU - Noyes, D.

AU - Ryan, J. M.

AU - Samuelson, F. W.

AU - Parkinson, P. M.Saz

AU - Shoup, A.

AU - Sinnis, G.

AU - Smith, A. J.

AU - Sullivan, G. W.

AU - Williams, D. A.

AU - Wilson, M. E.

AU - Xu, X. W.

AU - Yodh, G. B.

PY - 2005/12/16

Y1 - 2005/12/16

N2 - 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 γ(>3.5TeV)=(6.4±1. 4±2.1)×10-11cm-2s-1sr-1. This flux is consistent with an extrapolation of the EGRET spectrum between 1 and 30 GeV in this galactic region.

AB - 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 γ(>3.5TeV)=(6.4±1. 4±2.1)×10-11cm-2s-1sr-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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ER -

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

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