Possible observation of 100 TeV gamma rays from the active galaxy Centaurus a

Allen, William H.; Bond, I. A.; Budding, E.; Conway, M. J.; Daniel, A.; Fenton, K. B.; Fujii, Hirofumi; Fujii, Z.; Hayashida, N.; Hibino, K.; Honda, M.; Humble, J. E.; Kabe, S.; Kasahara, K.; Kifune, T.; Lythe, Grant; Masaike, A.; Matsubara, Y.; Mitsui, K.; Miura, Yoshio; Mori, M.; Muraki, Y.; Nagano, M.; Nakamura, Takashi; Nakamura, Masaki; Norris, P. M.; Ogio, S.; Saito, T.; Sakata, M.; Sato, H.; Shimizu, Hideyuki; Spencer, M.; Storey, J. R.; Tanimori, T.; Teshima, M.; Torii, Shoji; Wadsworth, A.; Watase, Y.; Woodhams, Michael D.; Yamamoto, Y.; Yock, P. C. M.; Yuda, T.

doi:10.1016/0927-6505(93)90012-3

Cited by 19 publications

(8 citation statements)

References 28 publications

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“…In the same way, Centaurus A, our nearest active galaxy, shows no evidence for cosmic ray acceleration to these energies, although there is some evidence at lower energies (e.g. Allen et al 1993;Clay, Dawson & Meyhandan 1994). If this applies as a general rule for FR I sources (centrally concentrated, double-lobed, extended radio sources, as opposed to FR II sources, which have widely separated regions of maximum brightness; see Jackson 1999) such as Cen A, we have to look to very esoteric objects for the origins of the highest-energy cosmic rays.…”

Section: Cosmic Ray Directions and Sourcesmentioning

confidence: 87%

Two-point Angular Autocorrelation Function and the Origin of the Highest-energy Cosmic Rays

Clay

Dawson

Kewley

et al. 2000

Publ. – Astron. Soc. Aust

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Construction of the Pierre Auger Observatory for the study of the highest-energy cosmic rays is about to begin. Prior to the availability of data from that experiment, decisions should be made on techniques for the analysis of the directional properties of those data. We examine here one possible analysis tool, the two-point angular autocorrelation function. As a concrete example, data from the SUGAR array are examined in this way. Possible clustering of the data is observed, and the identification of such clustering with candidate astronomical objects in a purpose-developed catalogue is investigated.

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Section: Cosmic Ray Directions and Sourcesmentioning

confidence: 87%

Two-point Angular Autocorrelation Function and the Origin of the Highest-energy Cosmic Rays

Clay

Dawson

Kewley

et al. 2000

Publ. – Astron. Soc. Aust

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“…1970s with the Narrabri optical intensity interferometer of the University of Sydney [32]. The data show variability of the sources over periods of one year.…”

Section: Archival Observations Of Tev Emission Of Cen a Collected In mentioning

confidence: 93%

Untitled

Halzen

2011

Acta Phys. Pol. B

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Dedicated to Andrzej Białas in honour of his 75th birthdayIdentifying the accelerators that produce the Galactic and extragalactic cosmic rays has been a priority mission of several generations of high energy gamma ray and neutrino telescopes; success has been elusive so far. Detecting the gamma ray and neutrino fluxes associated with cosmic rays reaches a new watershed with the completion of IceCube, the first neutrino detector with sensitivity to the anticipated fluxes, and the construction of CTA, a ground-based gamma-ray detector that will map and study candidate sources with unprecedented precision. In this paper, we revisit the prospects for revealing the sources of the cosmic rays by a multiwavelength approach; after reviewing the methods, we discuss supernova remnants, gamma-ray bursts, active galaxies and GZK neutrinos in some detail.

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“…The first results of high energy photon detection from Cen A were reported by Grindlay et al [3]. Later Buckland Park array [4] and the JANSOZ observatory [5,6] measured the gamma ray flux near 100 TeV from this source. CANGAROO-I [7], JANZOS [5,6] and Durham [8] observed the nuclear region of Cen A and set upper limits on the emission of very high energy photons from this region.…”

Section: Introductionmentioning

confidence: 91%

“…The JANSOZ array reported a search for gamma ray emission from Cen A over the period of October 1987 to January 1992 [5,6]. No evidence was found for a steady flux but a period of 48 days in 1990 showed a flux excess of 3.8σ.…”

Section: Correlating γ-Ray and Cosmic Ray Emissionmentioning

confidence: 99%

“…Later Buckland Park array [4] and the JANSOZ observatory [5,6] measured the gamma ray flux near 100 TeV from this source. CANGAROO-I [7], JANZOS [5,6] and Durham [8] observed the nuclear region of Cen A and set upper limits on the emission of very high energy photons from this region. The HESS group [9] observed Cen A for a few hours in 2004 and put an upper limit on the gamma ray flux above 190 GeV.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Study of photoinduced absorption by the method of modified laser photothermal radiometry

Skvortsov¹,

Maksimov²,

Tuchkov³

2008

Quantum Electron.

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Centaurus A, the cosmic ray accelerator a few Mpc away from us, is possibly one of the nearest sources of extremely high energy cosmic rays. We investigate whether the gamma ray data currently available from Centaurus A in the GeV-TeV energy band can be explained with only proton-proton interactions. We show that for a single power law proton spectrum, mechanisms of γ-ray production other than proton-proton interactions are needed inside this radio-galaxy to explain the gamma ray flux observed by EGRET, upper limits from HESS/CANGAROO-III and the correlated extremely energetic cosmic ray events observed by the Pierre Auger experiment. In future, with better γ-ray data, and simultaneous observation with γ-ray and cosmic ray detectors, it will be possible to carry out such studies on different sources in more detail.

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Possible observation of 100 TeV gamma rays from the active galaxy Centaurus a

Cited by 19 publications

References 28 publications

Two-point Angular Autocorrelation Function and the Origin of the Highest-energy Cosmic Rays

Two-point Angular Autocorrelation Function and the Origin of the Highest-energy Cosmic Rays

Untitled

Study of photoinduced absorption by the method of modified laser photothermal radiometry

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