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Your search keyword '"Ptitsyna K. V."' showing total 10 results
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10 results on '"Ptitsyna K. V."'

1. Search for astrophysical PeV gamma rays from point sources with Carpet-2

Author

Dzhappuev D. D., Dzaparova I. M., Gorbacheva E. A., Karpikov I. S., Khadzhiev M. M., Klimenko N. F., Kudzhaev A. U., Kurenya A. N., Lidvansky A. S., Mikhailova O. I., Petkov V. B., Ptitsyna K. V., Romanenko V. S., Rubtsov G. I., Troitsky S. V., Yanin A. F., and Zhezher Ya. V.

Subjects
Physics, QC1-999
Abstract

Early results of the search for Eγ > 1 PeV cosmic photons from point sources with the data of Carpet–2, an air-shower array equipped with a 175 m2 muon detector, are presented. They include 95% CL upper limits on PeV photon fluxes from stacked directions of high-energy IceCube neutrino events and from four predefined sources, Crab, Cyg X-3, Mrk 421 and Mrk 501. An insignificant excess of events from Mrk 421 will be further monitored. Prospects of the use of the upgraded installation, Carpet–3 (410 m2 muon detector), scheduled to start data taking in 2019, for searches of Eγ > 100 TeV photons, are briefly discussed.

Published
2019
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2. Carpet-2 search for PeV gamma rays associated with IceCube high-energy neutrino events

Author

Dzhappuev, D. D., Dzaparova, I. M., Gorbacheva, E. A., Karpikov, I. S., Khadzhiev, M. M., Klimenko, N. F., Kudzhaev, A. U., Kurenya, A. N., Lidvansky, A. S., Mikhailova, O. I., Petkov, V. B., Ptitsyna, K. V., Romanenko, V. S., Rubtsov, G. I., Troitsky, S. V., Yanin, A. F., and Zhezher, Ya. V.

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

Carpet-2 is an air-shower array at Baksan Valley, Russia, equipped with a large-area (175 m^2) muon detector, which makes it possible to separate primary photons from hadrons. We report the first results of the search for primary photons with energies E_\gamma>1 PeV, directionally associated with IceCube high-energy neutrino events, in the data obtained in 3080 days of Carpet-2 live time., Comment: 6 pages, 2 figures. V2: minor copy-editing changes. Accepted by JETP Letters

Published
2018
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3. Towards a model of population of astrophysical sources of ultra-high-energy cosmic rays

Author

Kalashev, O. E., Ptitsyna, K. V., and Troitsky, S. V.

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

We construct and discuss a toy model of the population of numerous non-identical extragalactic sources of ultra-high-energy cosmic rays. In the model, cosmic-ray particles are accelerated in magnetospheres of supermassive black holes in galactic nuclei, the key parameter of acceleration being the black-hole mass. We use astrophysical data on the redshift-dependent black-hole mass function to describe the population of these cosmic-ray accelerators, from weak to powerful, and confront the model with cosmic-ray data., Comment: 9 pages, 4 figures, Revtex 4.1

Published
2012
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7. The Carpet-3 multipurpose shower array for searching cosmic diffuse gamma rays with energy Eγ > 100 TeV

Author

Kudzhaev, A U, primary, Dzhappuev, D D, additional, Afashokov, Yu Z, additional, Gorbacheva, E A, additional, Dzaparova, I M, additional, Khadzhiev, M M, additional, Klimenko, N F, additional, Kurenya, A N, additional, Lidvansky, A S, additional, Mikhailova, O I, additional, Ptitsyna, K V, additional, Petkov, V B, additional, Romanenko, V S, additional, and Yanin, A F, additional

Published
2019
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8. Search for astrophysical PeV gamma rays from point sources with Carpet-2

Author

Dzhappuev, D. D., Dzaparova, I. M., Gorbacheva, E. A., Karpikov, I. S., Khadzhiev, M. M., Klimenko, N. F., Kudzhaev, A. U., Kurenya, A. N., Lidvansky, A. S., Mikhailova, O. I., Petkov, V. B., Ptitsyna, K. V., Romanenko, V. S., Rubtsov, G. I., Troitsky, S. V., Yanin, A. F., Zhezher, Ya. V., Dzhappuev, D. D., Dzaparova, I. M., Gorbacheva, E. A., Karpikov, I. S., Khadzhiev, M. M., Klimenko, N. F., Kudzhaev, A. U., Kurenya, A. N., Lidvansky, A. S., Mikhailova, O. I., Petkov, V. B., Ptitsyna, K. V., Romanenko, V. S., Rubtsov, G. I., Troitsky, S. V., Yanin, A. F., and Zhezher, Ya. V.

Abstract

Early results of the search for E_\gamma>1 PeV cosmic photons from point sources with the data of Carpet-2, an air-shower array equipped with a 175 m^2 muon detector, are presented. They include 95% CL upper limits on PeV photon fluxes from stacked directions of high-energy IceCube neutrino events and from four predefined sources, Crab, Cyg X-3, Mrk 421 and Mrk 501. An insignificant excess of events from Mrk 421 will be further monitored. Prospects of the use of the upgraded installation, Carpet-3 (410 m^2 muon detector), scheduled to start data taking in 2019, for searches of E_\gamma>100 TeV photons, are briefly discussed., Comment: 5 pages, 2 figures, webofc style. Presented at the VLVNT-2018 workshop, Dubna, October 2-4, 2018. V2: minor copy-editing changes

Published
2018
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9. Search for diffuse cosmic gamma rays of energy Eγ> 100 TeV with the Carpet-3 air shower array

Author

Dzhappuev, D D, primary, Petkov, V B, additional, Lidvansky, A S, additional, Volchenko, V I, additional, Volchenko, G V, additional, Gorbacheva, E A, additional, Dzaparova, I M, additional, Klimenko, N F, additional, Kudzhaev, A U, additional, Kurenya, A N, additional, Mikhailova, O I, additional, Ptitsyna, K V, additional, Khadzhiev, M M, additional, and Yanin, A F, additional

Published
2017
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