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, Roman 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

Research output: Contribution to journalArticle

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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 languageEnglish (US)
Article number251103
JournalPhysical Review Letters
Volume95
Issue number25
DOIs
StatePublished - Dec 16 2005
Externally publishedYes

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gamma rays
cosmic ray showers
equators
longitude
field of view
narrowband
extrapolation
standard deviation
detectors
water

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Atkins, R., Benbow, W., Berley, D., Blaufuss, E., Coyne, D. G., Deyoung, T., ... 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, Roman; 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 journalArticle

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 DG, Deyoung T et al. Evidence for TeV gamma-ray emission from a region of the galactic plane. Physical Review Letters. 2005 Dec 16;95(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, Roman ; 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 - 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, Roman

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.

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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.

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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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