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Your search keyword '"O. A. Chvalaev"' showing total 8 results
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8 results on '"O. A. Chvalaev"'

1. Early optical observations of seven gamma-ray bursts in comparison to their gamma X-ray characteristics in the MSU MASTER Global Robotic Telescopes Net

Author

V. M. Lipunov, N. V. Tyurina, V. G. Kornilov, E. S. Gorbovskoy, V. V. Vladimirov, A. S. Kuznetzov, P. V. Balanutsa, D. S. Zimnukhov, V. V. Chazov, D. M. Vlasenko, A. G. Tlatov, V. A. Senik, O. A. Ershova, O. A. Gress, N. M. Budnev, S. A. Yazev, O. B. Chvalaev, V. A. Poleshchuk, Yu. V. Ishmuhametova, V. V. Yurkov, A. V. Gabovich, Yu. P. Sergienko, R. Podesta, C. Lopez, F. Podesta, H. Levato, R. R. Lopez, M. Serra-Ricart, N. Lodieu, G. Israelian, L. Suarez-Andrez, and D. Buckley

Subjects
gamma-ray bursts, master robotic telescopes net, observations of gamma-ray bursts in the visible range, the effect of gamma-ray bursts on the biosphere of the earth, gamma-ray bursts as a possible cause of extinction, Science
Abstract

Seven gamma-ray bursts – GRB 130907A, GRB 140311B, GRB 140129B, GRB 160227A, GRB 120404A, GRB 110801A, and GRB 120811C were observed by the MSU MASTER (Mobile Astronomical System of TElescope Robots) Global Network. Full automation of the observations provided for obtaining unique data on the properties of early optical radiation accompanying gamma-ray bursts. The data are compared in the optical (MASTER), X-ray (SWIFT X-ray Telescope, XRT) and gamma (SWIFT Burst Alert Telescope, BAT) ranges. Based on the data obtained, two groups are identified, and their radiation mechanisms are revealed. The effect of gamma-ray bursts on the biosphere of the Earth is determined, and the estimates and the scale of such an effect are considered.

Published
2019
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2. First results from the operation of the prototype Tunka-HiSCORE array

Author

S. F. Berezhnev, N. M. Budnev, M. Büker, M. Brückner, R. Wischnewski, A. V. Gafarov, O. A. Gress, T. Gress, A. N. Dyachok, S. N. Epimakhov, A. V. Zagorodnikov, V. L. Zurbanov, N. N. Kalmykov, N. I. Karpov, E. N. Konstantinov, E. E. Korosteleva, V. A. Kozhin, M. Kunnas, L. A. Kuzmichev, A. Chiavassa, B. K. Lubsandorzhiev, N. B. Lubsandorzhiev, R. R. Mirgazov, R. D. Monkhoev, R. Nachtigall, A. L. Pakhorukov, M. I. Panasyuk, L. V. Pankov, A. Porelli, V. A. Poleshchuk, E. G. Popova, V. V. Prosin, V. S. Ptuskin, M. Rueger, G. I. Rubtsov, Yu. A. Semeney, A. A. Silaev, A. V. Skurikhin, L. G. Sveshnikova, M. Tluczykont, D. Hampf, D. Horns, and O. A. Chvalaev

Subjects
Physics, Data processing, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Instrumentation and Methods for Astrophysics, Gamma ray, General Physics and Astronomy, Astronomy, Cosmic ray, Differential spectrum, Observatory, Angle of arrival, Cherenkov radiation, Energy (signal processing), Remote sensing
Abstract

The Tunka-HISCORE wide-angle Cherenkov array, one part of the planned TAIGA integrated gamma observatory intended for investigations in the field of high-energy (>30 TeV) gamma-ray astronomy and cosmic-ray physics, is deployed in the Tunka Valley (Buryat Republic). The first results from operating a prototype array composed of nine stations spread over an area of ∼0.1 square kilometers during the winter of 2013–2014 are presented. Data processing techniques are described, along with data on the accuracy of reconstructing the position of a shower’s axis, energy, and angle of arrival. The differential spectrum of all cosmic-ray particles in a shower in the energy range of 2 × 1014 to 2 × 1016 eV is presented and compared to the available data.

Published
2015
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3. Energy spectrum and mass composition of cosmic rays, by the data of the Tunka-133 array

Author

S. F. Berezhnev, N. M. Budnev, O. A. Gress, A. N. Dyachok, S. N. Epimakhov, A. V. Zagorodnikov, N. N. Kalmykov, N. I. Karpov, V. A. Kozhin, E. N. Konstantinov, A. V. Korobchenko, E. E. Korosteleva, L. A. Kuzmichev, A. Chiavassa, B. K. Lubsandorzhiev, N. B. Lubsandorzhiev, R. R. Mirgazov, R. D. Monkhoev, E. A. Osipova, M. I. Panasyuk, L. V. Pankov, A. L. Pakhorukov, E. G. Popova, V. V. Prosin, V. S. Ptuskin, L. G. Sveshnikova, Yu. A. Semeney, A. A. Silaev, A. V. Skurikhin, O. A. Chvalaev, C. Spiering, and I. V. Yashin

Subjects
Core (optical fiber), Physics, Range (particle radiation), Air shower, Primary energy, General Physics and Astronomy, Direction of arrival, Cosmic ray, Astrophysics, Energy (signal processing), Cherenkov radiation, Computational physics
Abstract

The Tunka-133 Cherenkov light array for the detection of extensive air showers (EAS) acquires data over the five winters from 2009 to 2014. The direction of arrival, the shower core coordinates on the plane of observation, the primary energy, and the depth of the shower maximum are reconstructed for each EAS. A differential all-particle energy spectrum is obtained in the energy range of 6 × 1015–3 × 1018 eV over 1540 h, along with the energy dependence of the average depth of the shower maximum in the range of 6 × 1016–3 × 1018 eV. Based on this dependence, the variation in the average composition of the primary cosmic rays is estimated as a function of energy.

Published
2015
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4. The Primary CR Spectrum by the Data of the Tunka-133 Array

Author

S. F. Berezhnev, N. M. Budnev, A. Chiavassa, O. A. Chvalaev, O. A. Gress, T. I. Gress, A. N. Dyachok, S. N. Epimakhov, N. I. Karpov, N. N. Kalmykov, E. N. Konstantinov, A. V. Korobchenko, E. E. Korosteleva, V. A. Kozhin, L. A. Kuzmichev, B. K. Lubsandorzhiev, N. B. Lubsandorzhiev, R. R. Mirgazov, R. D. Monkhoev, E. A. Osipova, A. L. Pakhorukov, M. I. Panasyuk, L. V. Pankov, E. G. Popova, V. V. Prosin, V. S. Ptuskin, Yu. A. Semeney, A. A. Silaev, A. V. Skurikhin, C. Spiering, L. G. Sveshnikova, and A. V. Zagorodnikov

Subjects
Physics, Data acquisition, Calibration (statistics), Primary (astronomy), Energy spectrum, Astronomy, Astrophysics, Spectrum (topology)
Published
2016
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5. The Taiga project

Author

I I Yashin, I I Astapov, N S Barbashina, A G Bogdanov, V Boreyko, N M Budnev, M Büker, M Bruckner, A Chiavassa, O B Chvalaev, A V Gafarov, N Gorbunov, V Grebenyuk, O A Gress, A Grinyuk, O G Grishin, A N Dyachok, S N Epimakhov, T V Eremin, D Horns, A L Ivanova, N N Kalmykov, N I Karpov, Y A Kazarina, V V Kindin, N V Kirichkov, S N Kiryuhin, R P Kokouli, K G Kompaniets, E N Konstantinov, A V Korobchenko, E E Korosteleva, V A Kozhin, M Kunnas, L A Kuzmichev, V V Lenok, B K Lubsandorzhiev, N B Lubsandorzhiev, R R Mirgazov, R Mirzoyan, R D Monkhoev, R Nachtigall, A L Pakhorukov, M I Panasyuk, L V Pankov, A A Perevalov, A A Petrukhin, V A Platonov, V A Poleschuk, M Popescu, E G Popova, A Porelli, V V Prosin, V S Ptuskin, G I Rubtsov, M Rueger, V G Rybov, V S Samoliga, P S Satunin, A Saunkin, V Yu Savinov, Yu A Semeney, B A Shaibonov, A A Silaev, A V Skurikhin, M Slunecka, C Spiering, L G Sveshnikova, V A Tabolenko, A Tkachenko, L G Tkachev, M Tluczykont, A D Veslopopov, E P Veslopopova, D M Voronov, R Wischnewski, K O Yurin, A V Zagorodnikov, V N Zirakashvili, and V L Zurbanov

Subjects
Physics, History, Range (particle radiation), Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Taiga, Detector, Cosmic ray, Astrophysics, 01 natural sciences, Particle detector, Computer Science Applications, Education, 0103 physical sciences, High Energy Physics::Experiment, Ultrahigh energy, 010306 general physics, Cherenkov radiation, Muon detector
Abstract

The TAIGA project is aimed at solving the fundamental problems of gamma-ray astronomy and physics of ultrahigh energy cosmic rays with the help of the complex of detectors, located in the Tunka valley (Siberia, Russia). TAIGA includes a wide-angle large area Tunka-HiSCORE array, designed to detect gamma-rays of ultrahigh energies in the range 20 - 1000 TeV and charged cosmic rays with energies of 100 TeV - 100 PeV, large area muon detector to improve the rejection of background EAS protons and nuclei and a network of imaging atmospheric Cherenkov telescopes for gamma radiation detection. We discuss the goals and objectives of the complex features of each detector and the results obtained in the first stage of the HiSCORE installation.

Published
2016
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6. The hardware of the HiSCORE γ-ray and cosmic ray Cherenkov detector

Author

M. Kunnas, R. Nachtigall, S. N. Epimakhov, M. Tluczykont, L. A. Kuzmichev, S. F. Berezhnev, N. M. Budnev, M. Büker, A. Chiavassa, O. B. Chvalaev, O. A. Gress, A. N. Dyachok, U. Einhaus, D. Hampf, D. Horns, A. Ivanova, N. I. Karpov, N. N. Kalmykov, E. N. Konstantinov, A. V. Korobchenko, E. E. Korosteleva, V. A. Kozhin, B. K. Lubsandorzhiev, N. B. Lubsandorzhiev, R. R. Mirgazov, A. Pakhorukov, M. I. Panasyuk, L. V. Pankov, V. Poleschuk, E. G. Popova, V. V. Prosin, V. S. Ptuskin, G. P. Rowell, Yu. A. Semeney, B. A. Shaibonov (junior), A. A. Silaev, A. A. Silaev (junior), A. V. Skurikhin, C. Spiering, L. G. Sveshnikova, R. Wischnewski, I. V. Yashin, and A. V. Zagorodnikov

Subjects
Physics, Photomultiplier, COSMIC cancer database, business.industry, Cherenkov detector, Gamma ray, Astronomy, Single station, Cosmic ray, First light, law.invention, Air shower, law, business, Computer hardware
Abstract

The HiSCORE (Hundred Square km Cosmic ORigin Explorer) project is a ground-based large-area wideangle air shower detector array that will measure gamma rays and cosmic rays in the energy range of 10 TeV up to 1EeV. Each detector array station consists of four separate light collectors with an 8-inch photomultiplier (PMT) at each end. The first station prototype has already been deployed to Tunka valley. On-site station integration and first measurements have been made. This poster will focus on the hardware aspects and the first light results of the single station.

Published
2012
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7. TAIGA the Tunka Advanced Instrument for cosmic ray physics and Gamma Astronomy — present status and perspectives

Author

N M Budnev, I I Astapov, A G Bogdanov, V Boreyko, M Büker, M Brückner, A Chiavassa, A V Gafarov, O B Chvalaev, N Gorbunov, V Grebenyuk, A Grinyuk, O A Gress, T Gress, A N Dyachok, S N Epimakhov, D Horns, A L Ivanova, N I Karpov, N N Kalmykov, Y A Kazarina, V Kindin, N V Kirichkov, S N Kiryuhin, R P Kokoulin, K G Kompaniets, E N Konstantinov, A V Korobchenko, E E Korosteleva, V A Kozhin, M Kunnas, L A Kuzmichev, V V Lenok, B K Lubsandorzhiev, N B Lubsandorzhiev, R R Mirgazov, R Mirzoyan, R D Monkhoev, R Nachtigall, A L Pakhorukov, M I Panasyuk, L V Pankov, V A Poleschuk, E G Popova, A Porelli, V V Prosin, V S Ptuskin, A A Petrukhin, G I Rubtsov, M Rueger, V S Samoliga, P S Satunin, V Yu Savinov, Yu A Semeney, B A Shaibonov Jr B A Shaibonov Jr, A A Silaev, A A Silaev Jr A A Silaev Jr, A V Skurikhin, M Slunecka, C Spiering, L G Sveshnikova, A Tkachenko, L Tkachev, M Tluczykont, R Wischnewski, I I Yashin, A V Zagorodnikov, and V L Zurbanov

Subjects
Physics, Physics::Instrumentation and Detectors, Cherenkov detector, Astrophysics::High Energy Astrophysical Phenomena, Taiga, Detector, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy, Cosmic ray, Astrophysics, Knee region, Cherenkov Telescope Array, law.invention, law, Instrumentation, Mathematical Physics, Cherenkov radiation
Abstract

TAIGA stands for ``Tunka Advanced Instrument for cosmic ray physics and Gamma Astronomy'' and is a project to built a complex, hybrid detector system for ground-based gamma-ray astronomy from a few TeV to several PeV, and for cosmic ray studies from 100 TeV to 1 EeV. TAIGA will search for ``PeVatrons'' (ultra-high energy gamma-ray sources) and measure the composition and spectrum of cosmic rays in the knee region (100 TeV–10 PeV) with good energy resolution and high statistics. TAIGA will include Tunka-HiSCORE — an array of wide-angle air Cherenkov stations, an array of Imaging Atmospheric Cherenkov Telescopes, an array of particle detectors, both on the surface and underground and the TUNKA-133 air Cherenkov array.

Published
2014
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8. First deployment and prototype data of HiSCORE

Author

R Nachtigall, M Kunnas, S N Epimakhov, M Tluczykont, L A Kuzmichev, S F Berezhnev, N M Budnev, M Büker, A Chiavassa, O B Chvalaev, O A Gress, A N Dyachok, U Einhaus, D Hampf, D Horns, A Ivanova, N I Karpov, N N Kalmykov, E N Konstantinov, A V Korobchenko, E E Korosteleva, V A Kozhin, B K Lubsandorzhiev, N B Lubsandorzhiev, R R Mirgazov, A Pakharukov, M I Panasyuk, L V Pankov, V Poleschuk, E G Popova, V V Prosin, V S Ptuskin, G P Rowell, Yu A Semeney, B A Shaibonov, A A Silaev, A A Silaev (junior), A V Skurikhin, C Spiering, L G Sveshnikova, R Wischnewski, I V Yashin, and A V Zagorodnikov

Subjects
Physics, History, Photomultiplier, COSMIC cancer database, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, media_common.quotation_subject, Detector, Astrophysics::Instrumentation and Methods for Astrophysics, Gamma ray, Astronomy, Cosmic ray, Computer Science Applications, Education, Data acquisition, Air shower, Sky, media_common
Abstract

With the HiSCORE (Hundred*i Square kilometer Cosmic ORigin Explorer) experiment we aim at the exploration of the accelerator sky using indirect air shower observations of cosmic rays from 100 TeV to 1 EeV and gamma rays above 10 TeV to several PeV. In this paper the HiSCORE detector is discribed and the results of the first prototype deployment are shown. Several components are discussed like the photomultiplier tubes, the clip-sum-trigger and the DRS4 based data acquisition. We present data taken with a first prototype station in April 2012 at Tunka.

Published
2013
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