Observation of Distant Quasar 1739+522 and Comparison With Other Metagalactic Sources

Sinitsyna, V. G.; Arsov, Todor; Borisov, S. S.; Musin, F. I.; Nikolsky, S. I.; Malyshko, A. A.; Sinitsyna, V. Y.; Platonov, G. F.

doi:10.1142/s0217751x05030764

Cited by 8 publications

(23 citation statements)

References 2 publications

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“…In 1998 3C 454.3 was detected by SHALON at TeV energies [5] and was observed by SHALON in the period from 1998 to 2013, for a total of 69.2 hours, at zenith angles ranging from 18 • to 35 • . After the standard analysis, a clear excess corresponding to a 14.9σ effect [9] was determined.…”

Section: C 4543 (Z = 0859)mentioning

confidence: 93%

“…One more remote metagalactic γ -source of the FSRQ type was detected by SHALON in 1999 and is being intensively studied since then [1,5]. This object was identified with 1739 + 522 (4C + 51.37).…”

Section: + 522 (4c + 5137) (Z = 1375)mentioning

confidence: 99%

“…Some of these AGNs were discovered at TeV energies by SHALON. The results on fluxes, spectral energy distributions and images are shown here and in [1][2][3][4][5][6][7]. All SHALON results are compared with data from experiments at high and very high energies (see Figs.…”

Section: Introductionmentioning

confidence: 99%

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Very high energy emission sources beyond the Galaxy

et al. 2017

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Abstract. Active Galactic Nuclei (AGN) are considered as potential extragalactic sources of very and ultra high energy cosmic rays. According to theoretical predictions cosmic ray acceleration can take place at the shock created by the expanding cocoons around active galactic nuclei as well as at AGN jets. The measurements of AGN TeV spectra, the variability time scale of TeV emission can provide essential information on the dynamics of AGN jets, the localization of acceleration region and an estimation of its size. SHALON observations yielded data on extragalactic sources of different AGN types in the energy range of 800 GeV-100 TeV. The data from SHALON observations are compared with those from other experiments at high and very high energies.

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Section: C 4543 (Z = 0859)mentioning

confidence: 93%

Section: + 522 (4c + 5137) (Z = 1375)mentioning

confidence: 99%

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Very high energy emission sources beyond the Galaxy

et al. 2017

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“…The γ-astronomical researches are carrying out with SHALON [1][2][3][4][5][6][7][8][9] mirror Cherenkov telescope at the TienShan high-mountain observatory ( fig. 1).…”

Section: Shalon Telescopementioning

confidence: 99%

“…[2,3,5,[7][8][9]), whereas the amount of background showers to the selected gammashowers does not exceed of 10%.…”

Section: Shalon Telescopementioning

confidence: 99%

Extragalactic Background Light expected from photon-photon absorption on spectra of distant Active Galactic Nuclei

Sinitsyna

2013

EPJ Web of Conferences

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Abstract. Extragalactic background radiation blocks the propagation of TeV gamma-ray over large distances by producing e + e − pairs. As a result, primary spectrum of gamma-source is changed, depending on spectrum of background light. So, hard spectra of Active Galactic Nuclei with high red shifts allow the determination of a EBL spectrum. The redshifts of SHALON TeV gamma-ray sources range from 0.018 to 1.375 those spectra are resolved at the energies from 800GeV to 30 TeV. Spectral energy distribution of EBL constrained from observations of Mkn421 (z=0.031), Mkn501 (z=0.034), Mkn180 (z=0.046), OJ287 (z=0.306), 3c454.3 (z=0.859) and 1739+522 (z=1.375) together with models and measurements are presented.

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Extragalactic Background Light expected from photon-photon absorption on spectra of distant Active Galactic Nuclei

Sinitsyna

2013

EPJ Web of Conferences

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Extragalactic background radiation blocks the propagation of TeV gamma-ray over large distances by producing e + e − pairs. As a result, primary spectrum of gamma-source is changed, depending on spectrum of background light. So, hard spectra of Active Galactic Nuclei with high red shifts allow the determination of a EBL spectrum. The redshifts of SHALON TeV gamma-ray sources range from 0.018 to 1.375 those spectra are resolved at the energies from 800GeV to 30 TeV. Spectral energy distribution of EBL constrained from observations of Mkn421 (z=0.031), Mkn501 (z=0.034), Mkn180 (z=0.046), OJ287 (z=0.306), 3c454.3 (z=0.859) and 1739+522 (z=1.375) together with models and measurements are presented. This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2 0 , which . permits unrestricted use, distributi and reproduction in any medium, provided the original work is properly cited. on, EPJ Web of Conferences

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Observation of Distant Quasar 1739+522 and Comparison With Other Metagalactic Sources

Cited by 8 publications

References 2 publications

Very high energy emission sources beyond the Galaxy

Very high energy emission sources beyond the Galaxy

Extragalactic Background Light expected from photon-photon absorption on spectra of distant Active Galactic Nuclei

Extragalactic Background Light expected from photon-photon absorption on spectra of distant Active Galactic Nuclei

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