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

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Physics and Astronomy(all)

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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), [251103]. https://doi.org/10.1103/PhysRevLett.95.251103

Evidence for TeV gamma-ray emission from a region of the galactic plane. / 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.; Linnemann, J. T.; McEnery, J. E.; Miller, R. S.; Mincer, A. I.; Morales, M. F.; Nemethy, P.; Noyes, D.; Ryan, J. M.; Samuelson, F. W.; Parkinson, P. M.Saz; Shoup, A.; Sinnis, G.; Smith, A. J.; Sullivan, G. W.; Williams, D. A.; Wilson, M. E.; Xu, X. W.; Yodh, G. B.

In: Physical Review Letters, Vol. 95, No. 25, 251103, 16.12.2005.

Research output: Contribution to journal › Article

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

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. ; Linnemann, J. T. ; McEnery, J. E. ; Miller, R. S. ; Mincer, A. I. ; Morales, M. F. ; Nemethy, P. ; Noyes, D. ; Ryan, J. M. ; Samuelson, F. W. ; Parkinson, P. M.Saz ; Shoup, A. ; Sinnis, G. ; Smith, A. J. ; Sullivan, G. W. ; Williams, D. A. ; Wilson, M. E. ; Xu, X. W. ; Yodh, G. B. / Evidence for TeV gamma-ray emission from a region of the galactic plane. In: Physical Review Letters. 2005 ; Vol. 95, No. 25.

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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.",

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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.

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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.

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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.

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10.1103/PhysRevLett.95.251103