Recent results from the Milagro gamma ray observatory

J. A. Goodman, 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, 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

    Research output: Contribution to journalArticle

    Abstract

    The Milagro gamma-ray observatory utilizes a large water Cherenkov detector to observe TeV extensive air showers produced by high energy particles impacting the Earth's atmosphere. Milagro is different from Atmospheric Cherenkov Telescopes that are used to study TeV gamma-rays in that it views a wide field (2 steradian over-head sky) and it continuously operates (>90% live time). These factors give Milagro the potential for discovery of new sources with unknown positions and times, such as gamma-ray bursts, flaring AGN, and observation of diffuse extended sources like the Galactic plane or large supernova remnants. The Milagro detector consists of a 4800 m2 pond instrumented with 723 8" PMTs which detect Cherenkov light produced by secondary air-shower particles. A sparse array of 175 4000l water tanks surrounding the central pond detector has recently been added which will extend the physical area of Milagro to 40,000 m2 and substantially increase the sensitivity of the instrument. Based on three years of operation, Milagro has established its sensitivity through the detection of the Crab plerion and active galaxy Markarian 421. A summary of the recent results from the Milagro collaboration is presented with a focus on the first observation of the galactic plane in the TeV range and evidence for two newly observed TeV sources: diffuse emission from the Cygnus Region, and evidence for an extended TeV hot spot near the EGRET unidentified 3EG J0520+2556.

    Original languageEnglish (US)
    Pages (from-to)101-107
    Number of pages7
    JournalNuclear Physics B - Proceedings Supplements
    Volume151
    Issue number1
    DOIs
    StatePublished - Jan 2006

    Fingerprint

    Gamma Ray Observatory
    cosmic ray showers
    detectors
    active galaxies
    crabs
    sensitivity
    Earth atmosphere
    supernova remnants
    particle energy
    gamma ray bursts
    water
    sky
    gamma rays
    telescopes
    galaxies

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics

    Cite this

    Goodman, J. A., Atkins, R., Benbow, W., Berley, D., Blaufuss, E., Coyne, D. G., ... Sullivan, G. W. (2006). Recent results from the Milagro gamma ray observatory. Nuclear Physics B - Proceedings Supplements, 151(1), 101-107. https://doi.org/10.1016/j.nuclphysbps.2005.07.018

    Recent results from the Milagro gamma ray observatory. / Goodman, J. A.; 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.; 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.; Saz Parkinson, P. M.; Shoup, A.; Sinnis, G.; Smith, A. J.; Sullivan, G. W.

    In: Nuclear Physics B - Proceedings Supplements, Vol. 151, No. 1, 01.2006, p. 101-107.

    Research output: Contribution to journalArticle

    Goodman, JA, Atkins, R, Benbow, W, Berley, D, Blaufuss, E, Coyne, DG, DeYoung, T, Dingus, BL, Dorfan, DE, Ellsworth, RW, Fleysher, L, Fleysher, R, 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, Saz Parkinson, PM, Shoup, A, Sinnis, G, Smith, AJ & Sullivan, GW 2006, 'Recent results from the Milagro gamma ray observatory', Nuclear Physics B - Proceedings Supplements, vol. 151, no. 1, pp. 101-107. https://doi.org/10.1016/j.nuclphysbps.2005.07.018
    Goodman JA, Atkins R, Benbow W, Berley D, Blaufuss E, Coyne DG et al. Recent results from the Milagro gamma ray observatory. Nuclear Physics B - Proceedings Supplements. 2006 Jan;151(1):101-107. https://doi.org/10.1016/j.nuclphysbps.2005.07.018
    Goodman, J. A. ; 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. ; 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. ; Saz Parkinson, P. M. ; Shoup, A. ; Sinnis, G. ; Smith, A. J. ; Sullivan, G. W. / Recent results from the Milagro gamma ray observatory. In: Nuclear Physics B - Proceedings Supplements. 2006 ; Vol. 151, No. 1. pp. 101-107.
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    abstract = "The Milagro gamma-ray observatory utilizes a large water Cherenkov detector to observe TeV extensive air showers produced by high energy particles impacting the Earth's atmosphere. Milagro is different from Atmospheric Cherenkov Telescopes that are used to study TeV gamma-rays in that it views a wide field (2 steradian over-head sky) and it continuously operates (>90{\%} live time). These factors give Milagro the potential for discovery of new sources with unknown positions and times, such as gamma-ray bursts, flaring AGN, and observation of diffuse extended sources like the Galactic plane or large supernova remnants. The Milagro detector consists of a 4800 m2 pond instrumented with 723 8{"} PMTs which detect Cherenkov light produced by secondary air-shower particles. A sparse array of 175 4000l water tanks surrounding the central pond detector has recently been added which will extend the physical area of Milagro to 40,000 m2 and substantially increase the sensitivity of the instrument. Based on three years of operation, Milagro has established its sensitivity through the detection of the Crab plerion and active galaxy Markarian 421. A summary of the recent results from the Milagro collaboration is presented with a focus on the first observation of the galactic plane in the TeV range and evidence for two newly observed TeV sources: diffuse emission from the Cygnus Region, and evidence for an extended TeV hot spot near the EGRET unidentified 3EG J0520+2556.",
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    AU - Coyne, D. G.

    AU - DeYoung, T.

    AU - Dingus, B. L.

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    AU - Samuelson, F. W.

    AU - Saz Parkinson, P. M.

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