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1. Energy Spectrum and Mass Composition of Cosmic Rays from the Data of the Astrophysical Complex TAIGA

Author

V. Prosin, I. Astapov, P. Bezyazeekov, A. Borodin, M. Brückner, N. Budnev, A. Bulan, A. Chiavassa, A. Dyachok, A. Gafarov, A. Garmash, V. Grebenyuk, O. Gress, T. Gress, A. Grinyuk, O. Grishin, D. Horns, A. Ivanova, N. Kalmykov, V. Kindin, S. Kiryuhin, R. Kokoulin, K. Kompaniets, E. Korosteleva, V. Kozhin, E. Kravchenko, A. Kryukov, L. Kuzmichev, A. Lagutin, M. Lavrova, Yu. Lemeshev, B. Lubsandorzhiev, N. Lubsandorzhiev, R. Mirgazov, R. Mirzoyan, R. Monkhoev, E. Osipova, A. Pakhorukov, A. Pan, L. Pankov, V. Poleschuk, M. Popesku, E. Popova, A. Porelli, E. Postnikov, V. Ptuskin, A. Petrukhin, A. Pushnin, R. Raikin, E. Rjabov, G. Rubtsov, Y. Sagan, V. Samoliga, A. Sidorenkov, A. Silaev, A. Skurikhin, M. Slunecka, A. Sokolov, L. Sveshnikova, Y. Suvorkin, V. Tabolenko, A. Tanaev, B. Tarashansky, M. Ternovoy, L. Tkachev, M. Tluczykont, N. Ushakov, A. Vaidyanathan, P. Volchugov, D. Voronin, R. Wischnewski, I. Yashin, A. Zagorodnikov, and D. Zhurov

Subjects
Nuclear and High Energy Physics, Atomic and Molecular Physics, and Optics
Published
2021

2. Method and device for tests of the laser optical calibration system for the Baikal-GVD underwater neutrino Cherenkov telescope

Author

Konrad Kopański, Wojciech Noga, Paweł Malecki, V. A. Allakhverdyan, A. V. Avrorin, V. M. Aynutdinov, R. Bannasch, Zuzana Bardačová, I. A. Belolaptikov, I. V. Borina, V. Brudanin, N. M. Budnev, V. Y. Dik, G. V. Domogatsky, A. A. Doroshenko, Rastislav Dvornicky, A. N. Dyachok, Zh.-A. M. Dzhilkibaev, Eliška Eckerová, T. V. Elzhov, L. Fajt, Stanislav Vasilevich Fialkovsky, A. R. Gafarov, K. V. Golubkov, N. S. Gorshkov, T. I. Gress, M. S. Katulin, K. G. Kebkal, O. G. Kebkal, E. V. Khramov, M. M. Kolbin, K. V. Konischev, A. V. Korobchenko, A. P. Koshechkin, V. A. Kozhin, M. V. Kruglov, M. K. Kryukov, V. F. Kulepov, Y. M. Malyshkin, M. B. Milenin, R. R. Mirgazov, D. V. Naumov, V. Nazari, D. P. Petukhov, E. N. Pliskovsky, M. I. Rozanov, V. D. Rushay, E. V. Ryabov, G. B. Safronov, B. A. Shaybonov, M. D. Shelepov, Fedor Šimkovic, A. E. Sirenko, A. V. Skurikhin, A. G. Solovjev, M. N. Sorokovikov, Ivan Štekl, A. P. Stromakov, E. O. Sushenok, O. V. Suvorova, V. A. Tabolenko, B. Tarashansky, Y. V. Yablokova, S. Yakovlev, and D. N. Zaborov

Published
2022

3. Search for nanosecond-fast optical transients with TAIGA-HiSCORE array

Author

Alexander Panov, I. Astapov, A. Awad, G. M. Beskin, Pavel Bezyazeekov, M. Blank, E. A. Bonvech, A. Borodin, M. Brückner, N. M. Budnev, A. Bulan, D. V. Chernov, A. Chiavassa, A. N. Dyachok, A. R. Gafarov, A. Garmash, V. Grebenyuk, O. Gress, T. I. Gress, A. Grinyuk, O. Grishin, Dieter Horns, A. Ivanova, N. Kalmykov, V. Kindin, S. Kiryuhin, R. Kokoulin, K. Kompaniets, E. Korosteleva, V. A. Kozhin, E. Kravchenko, A. A. Krivopalova, L. Kuzmichev, Alexander Kryukov, A. Lagutin, M. Lavrova, Yu. Lemeshev, B. Lubsandorzhiev, N. Lubsandorzhiev, A. Lukanov, D. Lukyantsev, R. R. Mirgazov, R. Mirzoyan, R. Monkhoev, E. Osipova, A. Pakhorukov, L. A. Panasenko, A. Pan, L. Pankov, A. Petrukhin, D. A. Podgrudkov, V. Poleschuk, M. Popesku, E. Popova, A. Porelli, E. Postnikov, V. Prosin, V. Ptuskin, A. Pushnin, R. Raikin, A. Razumov, E. Rjabov, G. Rubtsov, Y. Sagan, V. Samoliga, Andrei Sidorenkov, A. Silaev, A. A. Silaev (junior), A. V. Skurikhin, M. Slunecka, A. V. Sokolov, Y. Suvorkin, L. G. Sveshikova, V. A. Tabolenko, A. Tanaev, B. Tarashansky, M. Ternovoy, L. Tkachev, M. Tluczykont, N. Ushakov, A. Vaidyanathan, P. Volchugov, N. Volkov, D. Voronin, R. Wischnewski, I. Yashin, A. Zagorodnikov, and D. Zhurov

Published
2021

4. Automatic data processing for Baikal-GVD neutrino observatory

Author

Bair Shaybonov, R. Bannasch, Rastislav Dvornicky, L. Fajt, Pa. Malecki, V. Nazari, W. Noga, Fedor Šimkovic, Ivan Štekl, V. A. Allakhverdyan, A. V. Avrorin, V. M. Aynutdinov, Zuzana Bardačová, I. A. Belolaptikov, I. V. Borina, V. Brudanin, N. M. Budnev, V. Y. Dik, G. V. Domogatsky, A. A. Doroshenko, R. Dv Ornicky, A. N. Dyachok, Zh.-A. M. Dzhilkibaev, Eliška Eckerová, T. V. Elzhov, Stanislav Vasilevich Fialkovsky, A. R. Gafarov, K. V. Golubkov, N. S. Gorshkov, T. I. Gress, M. S. Katulin, K. G. Kebkal, O. G. Kebkal, E. V. Khramov, M. M. Kolbin, K. V. Konischev, K. A. Kopański, A. V. Korobchenko, A. P. Koshechkin, V. A. Kozhin, M. V. Kruglov, M. K. Kryukov, V. F. Kulepov, Pa . Malecki, Y. M. Malyshkin, M. B. Milenin, R. R. Mirgazov, D. V. Naumov, D. P. Petukhov, E. N. Pliskovsky, M. I. Rozanov, V. D. Rushay, E. V. Ryabov, G. B. Safronov, M. D. Shelepov, A. E. Sirenko, A. V. Skurikhin, A. G. Solovjev, M. N. Sorokovikov, A. P. Stromakov, E. O. Sushenok, O. V. Suvorova, V. A. Tabolenko, B. Tarashansky, Y. V. Yablokova, S. Yakovlev, and D. N. Zaborov

Subjects
Physics - Instrumentation and Detectors, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), Astrophysics - Instrumentation and Methods for Astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM)
Abstract

Baikal-GVD is a gigaton-scale neutrino observatory under construction in Lake Baikal. It currently produces about 100 GB of data every day. For their automatic processing, the Baikal Analysis and Reconstruction software (BARS) was developed. At the moment, it includes such stages as hit extraction from PMT waveforms, assembling events from raw data, assigning timestamps to events, determining the position of the optical modules using an acoustic positioning system, data quality monitoring, muon track and cascade reconstruction, as well as the alert signal generation. These stages are implemented as C++ programs which are executed sequentially one after another and can be represented as a directed acyclic graph. The most resource-consuming programs run in parallel to speed up processing. A separate Python package based on the luigi package is responsible for program execution control. Additional information such as the program execution status and run metadata are saved into a central database and then displayed on the dashboard. Results can be obtained several hours after the run completion., Presented at the 37th International Cosmic Ray Conference (ICRC 2021)

Published
2021

5. Monitoring of optical properties of deep lake water

Author

B. Tarashansky and E. Ryabov

Subjects
Physics, Materials science, Spectrometer, Scattering, business.industry, Isotropy, Attenuation length, Lake water, Wavelength, Optics, Spectral resolution, Underwater, business, Absorption (electromagnetic radiation), Instrumentation, Mathematical Physics
Abstract

We present the results of the one year monitoring of absorption and scattering lengths of light with wavelengths in the range of 375 nm to 532 nm within the effective volume of the deep underwater neutrino telescope Baikal-GVD, which were measured by a device named ≪BAIKAL-5D≫. ≪BAIKAL-5D≫ was installed during the 2020 winter expedition at a depth of 1250 m. To carry out the optical measurements, we use a device with a shaded point-like isotropic light source having a spectral resolution of about 3 nm. A wide angle light receiver is moved by a stepper motor so that the distance between the receiver and the light source can vary from 0.9 m to 7.4 m. The absorption and scattering lengths were measured every week in 6 spectral points. The short-time variation of absorption length was estimated.

Published
2021

6. Stereoscopic and monoscopic operation of the five IACTs in the TAIGA experiment

Author

Pavel Volchugov, A. Grinyuk, E. Postnikov, I. Astapov, A. Awad, Pavel Bezyazeekov, M. Blank, A. Borodin, A. Bulan, M. Brueckner, N. M. Budnev, A. Chiavassa, A. N. Dyachok, A. R. Gafarov, A. Garmash, V. Grebenyuk, O. Gress, T. I. Gress, O. Grishin, Dieter Horns, N. Kalmykov, V. Kindin, S. Kiryuhin, R. Kokoulin, K. Kompaniets, E. Korosteleva, V. A. Kozhin, E. Kravchenko, Alexander Kryukov, L. Kuzmichev, A. Lagutin, M. Lavrova, B. Lubsandorzhiev, N. Lubsandorzhiev, A. Lukanov, D. Lukyantsev, R. R. Mirgazov, R. Mirzoyan, R. Monkhoev, E. Osipova, A. Pakhorukov, A. Pan, M. I. Panasyuk, L. Pankov, A. Petrukhin, V. Poleschuk, M. Popesku, E. Popova, A. Porelli, V. Prosin, V. Ptuskin, A. Pushnin, R. Raikin, A. Razumov, G. Rubtsov, E. V. Ryabov, Y. Sagan, V. Samoliga, Yu. Semeney, A. Silaev, A. Silaev(junior), Andrei Sidorenkov, A. V. Skurikhin, M. Slunecka, A. Sokolov, C. Spiering, L. Sveshnikova, V. A. Tabolenko, B. Tarashansky, L. Tkachev, R. Togoo, M. Tluczykont, N. Ushakov, A. Vaidyanathan, N. Volkov, D. Voronin, R. Wischnewski, A. Zagorodnikov, D. Zhurov, and I. Yashin

Published
2021

7. Simulation of the Tunka-Grande, TAIGA-Muon and TAIGA-HiSCORE arrays for a search of astrophysical gamma quanta with energy above 100 TeV

Author

M Ternovoy, I Kotovschikov, N Budnev, A Chiavassa, A Dyachok, A Gafarov, A Garmash, V Grebenyuk, O Gress, T Gress, O Grishin, A Grinyuk, D Horns, A Ivanova, N Kalmykov, V Kindin, S Kiryuhin, R Kokoulin, K Kompaniets, E Korosteleva, V Kozhin, E Kravchenko, A Krykov, L Kuzmichev, A Lagutin, Y Lemeshev, B Lubsandorzhiev, N Lubsandorzhiev, R Mirgazov, R Mirzoyan, R Monkhoev, E Osipova, A Pakhorukov, A Pan, M Panasyuk, L Pankov, A Petrukhin, V Poleschuk, E Popova, A Porelli, E Postnikov, V Prosin, V Ptuskin, A Pushnin, R Raikin, G Rubtsov, E Rybov, Y Sagan, V Samoliga, A Silaev, A Silaev Jr, A Sidorenkov, A Skurikhin, C Slunecka, A Sokolov, Y Suvorkin, L Sveshnikova, V Tabolenko, A Tanaev, B Tarashansky, L Tkachev, M Tluczykont, R Togoo, N Ushakov, A Vaidyanathan, P Volchugov, D Voronin, R Wischnevski, A Zagorodnikov, D Zhurov, and I Yashin

Subjects
History, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Instrumentation and Methods for Astrophysics, Computer Science Applications, Education
Abstract

In the paper we present our simulation strategy of the Tunka-Grande, TAIGA-Muon, and TAIGA-HiSCORE arrays in the light of the problem of separation astrophysical high-energy gamma rays from the cosmic ray background. The paper contains a description of our simulation method, based on Geant4 and CORSIKA codes. We also present the prospect of future research with TAIGA (Tunka Advanced Instrument for cosmic rays and Gamma Astronomy) with using the simulation results.

Published
2021

8. Possibilities of the Tunka-Grande and TAIGA-Muon scintillation arrays with the TAIGA-HiSCORE Cherenkov array joint operation in the research of cosmic and gamma rays

Author

A Ivanova, N Budnev, A Chiavassa, A Dyachok, A Gafarov, A Garmash, V Grebenyuk, O Gress, T Gress, O Grishin, A Grinyuk, D Horns, N Kalmykov, V Kindin, S Kiryuhin, R Kokoulin, K Kompaniets, E Korosteleva, I Kotovschikov, V Kozhin, E Kravchenko, A Krykov, L Kuzmichev, A Lagutin, Y Lemeshev, B Lubsandorzhiev, N Lubsandorzhiev, R Mirgazov, R Mirzoyan, R Monkhoev, E Osipova, A Pakhorukov, A Pan, M Panasyuk, L Pankov, A Petrukhin, V Poleschuk, E Popova, A Porelli, E Postnikov, V Prosin, V Ptuskin, A Pushnin, R Raikin, G Rubtsov, E Rybov, Y Sagan, V Samoliga, A Silaev, A Sidorenkov, A Skurikhin, C Slunecka, A Sokolov, Y Suvorkin, L Sveshnikova, V Tabolenko, A Tanaev, B Tarashansky, M Ternovoy, L Tkachev, M Tluczykont, R Togoo, N Ushakov, A Vaidyanathan, P Volchugov, D Voronin, R Wischnevski, A Zagorodnikov, D Zhurov, and I Yashin

Subjects
Physics, History, Scintillation, Muon, COSMIC cancer database, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Taiga, Astrophysics::Instrumentation and Methods for Astrophysics, Gamma ray, Astronomy, Computer Science Applications, Education, Joint (geology), Cherenkov radiation
Abstract

The Tunka-Grande scintillation array is part of the TAIGA Gamma Observatory. It is intended for investigation of energy spectrum and mass composition of primary cosmic rays in the energy range 10 PeV–10 EeV and the search for diffuse cosmic gamma rays. The TAIGA-HiSCORE Cherenkov array aims at observing gamma-rays with the energy from 1 TeV. TAIGA-Muon low-threshold scintillation detector array is a network of surface and underground detectors for registration charge particles of EAS. Currently, 3 clusters have been deployed. The first cluster is running in test mode. It is planed that in the future the total area of the TAIGA-Muon will be about 2000 sq. m. and it will search astrophysical gamma-rays in the energy range from 100 TeV together with the Tunka-Grande scintillation array and the Cherenkov experiments of the TAIGA Gamma Observatory. To evaluate the possibility of join operation Tunka-Grande, TAIGA-Muon and TAIGA-HiSCORE, a simulation was performed using the CORSIKA and Geant4 software packages. The status of model-based studies is presented and assessed the prospects for joint operation of the arrays.

Published
2020

9. TAIGA—an advanced hybrid detector complex for astroparticle physics and high energy gamma-ray astronomy in the Tunka valley

Author

N. Budnev, I. Astapov, P. Bezyazeekov, E. Bonvech, V. Boreyko, A. Borodin, M. Brückner, A. Bulan, D. Chernov, D. Chernykh, A. Chiavassa, A. Dyachok, O. Fedorov, A. Gafarov, A. Garmash, V. Grebenyuk, O. Gress, T. Gress, A. Grinyuk, O. Grishin, D. Horns, A. Ivanova, N. Kalmykov, Y. Kazarina, V. Kindin, S. Kiryuhin, R. Kokoulin, K. Kompaniets, D. Kostunin, E. Korosteleva, V. Kozhin, E. Kravchenko, A. Kryukov, L. Kuzmichev, A. Lagutin, Yu. Lemeshev, B. Lubsandorzhiev, N. Lubsandorzhiev, R. Mirgazov, R. Mirzoyan, R. Monkhoev, E. Osipova, A. Pakhorukov, A. Pan, M. Panasyuk, L. Pankov, D. Podgrudkov, V. Poleschuk, M. Popesku, E. Popova, A. Porelli, E. Postnikov, V. Prosin, V. Ptuskin, A. Petrukhin, A. Pushnin, R. Raikin, E. Rjabov, G. Rubtsov, Y. Sagan, V. Samoliga, A. Sidorenkov, A. Silaev, A. Silaev (junior), A. Skurikhin, M. Slunecka, A. Sokolov, L. Sveshnikova, Y. Suvorkin, V. Tabolenko, A. Tanaev, B. Tarashansky, L. M.Ternovoy, A. Tkachenko, L. Tkachev, M. Tluczykont, N. Ushakov, A. Vaidyanathan, P. Volchugov, D. Voronin, R. Wischnewski, I. Yashin, A. Zagorodnikov, and D. Zhurov

Subjects
Astroparticle physics, Physics, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Physics beyond the Standard Model, High Energy Physics::Phenomenology, Detector, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy, Cosmic ray, Elementary particle, Gamma-ray astronomy, 01 natural sciences, 030218 nuclear medicine & medical imaging, 03 medical and health sciences, 0302 clinical medicine, Observatory, 0103 physical sciences, Instrumentation, Axion, Mathematical Physics
Abstract

The TAIGA observatory addresses ground-based gamma-ray astronomy at energies from a few TeV to several PeV, cosmic ray physics from 100 TeV to several EeV as well as for search for axion-like particles, Lorentz violations and another evidence of New Physics. In 2020 year a one square kilometer TAIGA setup should be put in operation.

Published
2020

10. Design features and data acquisition system of the TAIGA-Muon scintillation array

Author

A. Ivanova, N. Budnev, A. Chiavassa, A. Dyachok, O. Fedorov, A. Gafarov, A. Garmash, V. Grebenyuk, O. Gress, T. Gress, O. Grishin, A. Grinyuk, D. Horns, N. Kalmykov, Y.A. Kazarina, V. Kindin, S. Kiryuhin, R. Kokoulin, K. Kompaniets, E. Korosteleva, V. Kozhin, E. Kravchenko, A. Krykov, L. Kuzmichev, A. Lagutin, Y. Lemeshev, V. Lenok, B. Lubsandorzhiev, N. Lubsandorzhiev, R. Mirgazov, R. Mirzoyan, R. Monkhoev, E. Osipova, A. Pakhorukov, A. Pan, M. Panasyuk, L. Pankov, A. Petrukhin, V. Poleschuk, M. Popescu, E. Popova, A. Porelly, E. Postnikov, V.V. Prosin, V.S. Ptuskin, A.A. Pushnin, R. Raikin, G. Rubtsov, E. Rybov, Y. Sagan, V. Samoliga, A. Silaev, A. Silaev Jr., A. Sidorenkov, A. Skurikhin, C. Slunecka, A. Sokolov, C. Spiering, Y. Suvorkin, L. Sveshnikova, V. Tabolenko, A. Tanaev, B. Tarashansky, M. Ternovoy, L. Tkachev, M. Tluczykont, N. Ushakov, A. Vaidyanathan, P. Volchugov, D. Voronin, R. Wischnevski, A. Zagorodnikov, D. Zhurov, and I. Yashin

Subjects
spectrometer [muon], data acquisition, 01 natural sciences, 030218 nuclear medicine & medical imaging, 03 medical and health sciences, 0302 clinical medicine, Data acquisition, 0103 physical sciences, ddc:610, spectrometer: design, Instrumentation, activity report, scintillation counter, Mathematical Physics, Remote sensing, Data processing, Scintillation, Muon, 010308 nuclear & particles physics, Taiga, design [spectrometer], design [electronics], electronics: readout, control system, readout [electronics], Geology, muon: spectrometer, electronics: design
Abstract

International Conference on Instrumentation for Colliding Beam Physics, INSTR20, Novosibirsk, Russia, 24 Feb 2020 - 28 Feb 2020; Journal of Instrumentation 15(06), C06057 (2020). doi:10.1088/1748-0221/15/06/C06057, The TAIGA-Muon scintillation array is located in the Tunka Valley. It is a part of the single TAIGA experimental complex. Its construction has started in the summer of 2019. By the autumn of 2019, the first three clusters were installed. We describe the design of the TAIGA-Muon array, the data acquisition (DAQ) sistem, reading and control systems., Published by Inst. of Physics, London

Published
2020

11. TAIGA - a hybrid array for high energy gamma astronomy and cosmic ray physics

Author

N. Budnev, I. Astapov, P. Bezyazeekov, V. Boreyko, A. Borodin, M. Brueckner, A. Chiavassa, A. Dyachok, O. Fedorov, A. Gafarov, A. Garmash, N. Gorbunov, V. Grebenyuk, O. Gress, T. Gress, O. Grishin, A. Grinyuk, A. Haungs, R. Hiller, D. Horns, T. Huege, N. Kalmykov, Y. Kazarina, V. Kindin, S. Kiryuhin, P. Kirilenko, M. Kleifges, R. Kokoulin, K. Kompaniets, E. Korosteleva, D. Kostunin, V. Kozhin, E. Kravchenko, L. Kuzmichev, Yu. Lemeshev, V. Lenok, B. Lubsandorzhiev, N. Lubsandorzhiev, R. Mirgazov, R. Mirzoyan, R. Monkhoev, E. Osipova, A. Pakhorukov, M. Panasyuk, L. Pankov, A. Petrukhin, V. Poleschuk, M. Popescu, E. Popova, A. Porelli, E. Postnikov, V. Prosin, V. Ptuskin, E. Rjabov, G. Rubtsov, A. Pushnin, Y. Sagan, B. Sabirov, V. Samoliga, F. Schröder, Yu. Semeney, A. Silaev, A. Sidorenkov, A. Skurikhin, V. Slunecka, A. Sokolov, C. Spiering, L. Sveshnikova, V. Tabolenko, B. Tarashansky, A. Tkachenko, L. Tkachev, M. Tluczykont, R. Wischnewski, A. Zagorodnikov, D. Zhurov, V. Zurbanov, and I. Yashin

Subjects
Physics, Range (particle radiation), High energy, 010308 nuclear & particles physics, QC1-999, Taiga, Detector, Gamma ray, Astronomy, Cosmic ray, 01 natural sciences, Galaxy, Hybrid array, 0103 physical sciences, ddc:530, 010303 astronomy & astrophysics
Abstract

The physics motivations and advantages of the new TAIGA (Tunka Advanced Instrument for cosmic ray physics and Gamma Astronomy) detector are presented. TAIGA aims at gamma-ray astronomy at energies from a few TeV to several PeV, as well as cosmic ray physics from 100 TeV to several EeV. For the energy range 30 – 200 TeV the sensitivity of 10 km2 area TAIGA array for the detection of local sources is expected to be 5 × 10-14 erg cm-2 sec-1 for 300 h of observations. Reconstruction of the given EAS energy, incoming direction and its core position, based on the timing TAIGA-HiSCORE data, allows one to increase a distance between the IACTs up to 600-1000 m. The low investments together with the high sensitivity for energies ≥ 30-50 TeV make this pioneering technique very attractive for exploring the galactic PeVatrons and cosmic rays. At present the TAIGA first stage has been constructed in Tunka valley, 50 km West from the Lake Baikal. The first experimental results of the TAIGA first stage are presented.

Published
2018

12. Software design for the TAIGA-IACT telescope pointing and control system

Author

Dmitriy Zhurov, Oleg A Gress, I. Astapov, Pavel Bezyazeekov, V. Boreyko, A. Borodin, M. Brueckner, N. M. Budnev, A. Chiavassa, Aleksei Nikolaevich Dyachok, O. Fedorov, Aleksandr Gafarov, A. Garmash, N. Gorbunov, Victor Grebenyuk, T. I. Gress, O. Grishin, A. Grinyuk, Dieter Horns, A. Ivanova, N. Kalmykov, Y. Kazarina, V. Kindin, P. Kirilenko, S. Kiryuhin, R. Kokoulin, K. Kompaniets, E. Korosteleva, Vladimir V Kozhin, E. Kravchenko, M. Kunnas, L. Kuzmichev, Yu. Lemeshev, V. Lenok, B. Lubsandorzhiev, N. Lubsandorzhiev, Rashid Mirgazov, Razmik Mirzoyan, R. Monkhoev, R. Nachtigall, E. Osipova, A. Pakhorukov, M. I. Panasyuk, Leonid Pankov, A. Petrukhin, V. Poleschuk, E. Popescu, E. Popova, A. Porelli, E. Postnikov, V. Prosin, V. Ptuskin, Evgenii V Rjabov, G. Rubtsov, A. Pushnin, Yaroslav Sagan, B. Sabirov, V. Samoliga, Yu. Semeney, A. Silaev, A. Silaev(junior), Andrei Sidorenkov, Aleksandr Vasilevich Skurihin, V. Slunecka, A. V. Sokolov, C. Spiering, L. Sveshnikova, V. A. Tabolenko, B. Tarashansky, A. Tkachenko, L. Tkachev, M. Tluczykont, R. Wischnewski, Aleksey Zagorodnikov, Valery Zurbanov, and I. Yashin

Subjects
Physics::Instrumentation and Detectors, Computer science, Astrophysics::High Energy Astrophysical Phenomena, Detector, Astrophysics::Instrumentation and Methods for Astrophysics, IACT, Cosmic ray, Reflector (antenna), law.invention, Telescope, Data acquisition, law, Astrophysics::Solar and Stellar Astrophysics, Stepper, Astrophysics::Galaxy Astrophysics, Cherenkov radiation, Remote sensing
Abstract

In TAIGA (Tunka Advanced Instrument for cosmic ray physics and Gamma-ray Astronomy) detector we are commissioning the first Imaging Atmospheric Cherenkov Telescope (IACT). The telescope drive system comprises a motor controller and two stepper motors for axis control. For the pointing calibration of the telescope a CCD-camera is installed on the reflector dish of the telescope. The position of the CCD-camera allows us capturing both the Cherenkov camera and the observed source. In this report we describe the telescope positioning and the drive system software as well as the control of the CCD-camera data acquisition, archiving and processing system.

Published
2017

13. TAIGA-HiSCORE detection of the CATS-Lidar on the ISS as fast moving point source

Author

Ralf Wischnewski, A. Porelli, A. Garmash, I. Astapov, Pavel Bezyazeekov, V. Boreyko, A. Borodin, M. Brueckner, N. M. Budnev, A. Chiavassa, Aleksei Nikolaevich Dyachok, O. Fedorov, Aleksandr Gafarov, N. Gorbunov, E.S. Gorbovskoy, Victor Grebenyuk, O. Gress, T. I. Gress, O. Grishin, A. Grinyuk, Dieter Horns, A. Ivanova, N. Kalmykov, Y. Kazarina, V. Kindin, P. Kirilenko, S. Kiryuhin, R. Kokoulin, K. Kompaniets, E. Korosteleva, Vladimir V Kozhin, E. Kravchenko, M. Kunnas, L. Kuzmichev, Yu. Lemeshev, V. Lenok, B. Lubsandorzhiev, V.M. Lipunov, N. Lubsandorzhiev, Rashid Mirgazov, Razmik Mirzoyan, R. Monkhoev, R. Nachtigall, E. Osipova, A. Pakhorukov, M. I. Panasyuk, Leonid Pankov, A. Petrukhin, V. Poleschuk, E. Popescu, E. Popova, E. Postnikov, V. Prosin, V. Ptuskin, Evgenii V Rjabov, G. Rubtsov, A. Pushnin, Yaroslav Sagan, B. Sabirov, V. Samoliga, Yu. Semeney, A. Silaev, A. Silaev(junior), Andrei Sidorenkov, Aleksandr Vasilevich Skurihin, V. Slunecka, A. V. Sokolov, C. Spiering, G. Spengler, L. Sveshnikova, V. A. Tabolenko, B. Tarashansky, A. Tkachenko, L. Tkachev, M. Tluczykont, Aleksey Zagorodnikov, D. Zhurov, Valery Zurbanov, and I. Yashin

Subjects
Robotic telescope, Lidar, Forward scatter, Point source, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Instrumentation and Methods for Astrophysics, Calibration, Gamma ray, Environmental science, Satellite, Physics::Atmospheric and Oceanic Physics, Cherenkov radiation, Remote sensing
Abstract

We report the first ground-based observation of the CATS-LIDAR onboard the ISS by the TAIGA-HiSCORE gamma-ray facility, and the MASTER-Tunka Robotic telescope. HiSCORE detects unscattered laser light directly from the ISS, at up to km-scale distance from the laser beam spot on ground. The ISS-LIDAR turns out to be a unique calibration tool, in particular to verify the absolute astronomical pointing of HiSCORE. We detected the LIDAR for 11 ISS-passages; among these were observations of forward scattering of the laser beam in dense clouds, which might carry information complementary to the LIDAR technique. We expect other air Cherenkov installations like IACTs to benefit from this light source.

Published
2017

14. TAIGA - a hybrid detector complex for high energy gamma-ray astro-physics and cosmic ray physics in the Tunka valley

Author

Nikolai Mikhailovich Budnev, Leonid A Kuzmichev, Razmik Mirzoyan, I. Astapov, Pavel Bezyazeekov, V. Boreyko, A. Borodin, Martin Brueckner, Andrea Chiavassa, Aleksei Nikolaevich Dyachok, Oleg Fedorov, Aleksandr Gafarov, A. Garmash, N. Gorbunov, Victor Grebenyuk, O. Gress, T. I. Gress, O. Grishin, A. Grinyuk, Dieter Horns, A. Ivanova, N. Kalmykov, Y. Kazarina, Victor Kindin, P. Kirilenko, S. Kiryuhin, Rostislav Kokoulin, K. Kompaniets, E. Korosteleva, Vladimir V Kozhin, E. Kravchenko, M. Kunnas, Yu. Lemeshev, V. Lenok, Bayarto Lubsandorzhiev, Nima Lubsandorzhiev, Rashid Mirgazov, R. Monkhoev, R. Nachtigall, E. Osipova, A. Pakhorukov, Mikhail Panasyuk, Leonid Pankov, Anatoly Petrukhin, V. Poleschuk, Eugeny Popescu, E. Popova, Andrea Porelli, E. Postnikov, V. Prosin, Vladimir Ptuskin, Evgenii V Rjabov, Grigory Rubtsov, A. Pushnin, Yaroslav Sagan, B. Sabirov, Vladimir Samoliga, Yu. Semeney, A. Silaev, A. Silaev(junior), Andrei Sidorenkov, Aleksandr Vasilevich Skurihin, V. Slunecka, A. Sokolov, Christian Spiering, Lyubov Sveshnikova, V. A. Tabolenko, B. Tarashansky, A. Tkachenko, Leonid Tkachev, Martin Tluczykont, R. Wischnewski, Aleksey Zagorodnikov, D. Zhurov, Valery Zurbanov, and Igor Yashin

Subjects
Physics, Telescope, law, Detector, Gamma ray, Astronomy, Cosmic ray, IACT, Galaxy, Energy (signal processing), Cherenkov radiation, law.invention
Abstract

The physics motivations and characteristics of the new gamma-experiment TAIGA (Tunka Advanced Instrument for cosmic ray physics and Gamma Astronomy) are presented. The TAIGA experiment addresses ground-based gamma-ray astronomy at energies from a few TeV to several PeV, as well as cosmic ray physics from $100$ TeV to several EeV. For the energy range $30 - 200$ TeV the sensitivity of the planned for future extension of TAIGA up to $5$ km$^2$ area for detection of the local sources is expected to be $10^{-13}$ erg cm$^{-2}$ sec$^{-1}$ for $500$ h of observation. The combination of the wide angle Cherenkov timing detectors of the TAIGA-HiSCORE array and the $4$ m class Imaging Atmospheric Cherenkov Telescopes of the TAIGA-IACT array with their FoV of $10x10$ degrees offers a cost effective-way to construct a $5$ km$^2$ array. Reconstruction of an EAS energy, direction and core position based on the TAIGA-HiSCORE data will allow us to increase the distance between comparatively expensive IACTs up to $800 - 1200$ m. The low investments together with the high sensitivity for energies $\geqslant 30-50$ TeV make this pioneering technique very attractive for exploring the galactic PeVatrons and cosmic rays. In addition to the Cherenkov light detectors we intend to deploy an array of muon detectors (TAIGA-Muon array) over an area of 1 km$^2$ with a total area of about $2000 - 3000$ m$^2$. The TAIGA-IACT-HiSCORE together with the TAIGA-Muon array will be used for selection of gamma-ray induced EAS. At present the first stage of TAIGA have been constructed in the Tunka valley, $\sim 50$ km West from the Lake Baikal in Siberia. Now it consists of 28 TAIGA-HiSCORE Cherenkov stations distributed over an area of $0.25$ km$^2$ and the first IACT of the TAIGA-IACT array. We are planning to test operation of the single telescope in coincidence with the HiSCORE up to shower impact distances of $\sim 500 - 600$ m; for this purpose we already started construction of the second imaging telescope at $300$ m distance from the first one. During 2017 -- 2019 years we intend to increase the number of the TAIGA-HiSCORE stations up to $100 - 120$, spread on the area of $1$ km$^2$ and to deploy $2$ additional IACTs.

Published
2017

15. The TAIGA timing array HiSCORE - first results

Author

M. Tluczykont, N. Budnev, I. Astapov, N. Barbashina, A. Bogdanov, V. Boreyko, M. Brückner, A. Chiavassa, O. Chvalaev, O. Gress, T. Gress, O. Grishin, A. Dyachok, S. Epimakhov, O. Fedorov, A. Gafarov, N. Gorbunov, V. Grebenyuk, A. Grinuk, D. Horns, A. Kalinin, N. Karpov, N. Kalmykov, Y. Kazarina, S. Kiryuhin, R. Kokoulin, K. Kompaniets, A. Konstantinov, E. Korosteleva, V. Kozhin, E. Kravchenko, M. Kunnas, L. Kuzmichev, Yu. Lemeshev, B. Lubsandorzhiev, N. Lubsandorzhiev, R. Mirgazov, R. Mirzoyan, R. Monkhoev, R. Nachtigall, E. Osipova, A. Pakhorukov, M. Panasyuk, L. Pankov, A. Petrukhin, V. Poleschuk, E. Popova, A. Porelli, E. Postnikov, V. Prosin, V. Ptuskin, G. Rubtsov, A. Pushnin, V. Samoliga, P. Satunin, Yu. Semeney, A. Silaev, A. Skurikhin, M. Slunecka, A. Sokolov, C. Spiering, L. Sveshnikova, V. Tabolenko, B. Tarashansky, A. Tkachenko, L. Tkachev, D. Voronin, R. Wischnewski, A. Zagorodnikov, V. Zurbanov, D. Zhurov, and I. Yashin

Subjects
Physics, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, QC1-999, Detector, Taiga, Gamma ray, Astrophysics::Instrumentation and Methods for Astrophysics, Cosmic ray, Astrophysics, 01 natural sciences, Air shower, Sampling (signal processing), 0103 physical sciences, 010303 astronomy & astrophysics, Cherenkov radiation, Remote sensing
Abstract

Observations of gamma rays up to several 100 TeV are particularly important to spectrally resolve the cutoff regime of the long-sought Pevatrons, the cosmic-ray PeV accelerators. One component of the TAIGA hybrid detector is the TAIGA-HiSCORE timing array, which currently consists of 28 wide angle (0.6 sr) air Cherenkov timing stations distributed on an area of 0.25 km2 . The HiSCORE concept is based on (non-imaging) air shower front sampling with Cherenkov light. First results are presented.

Published
2017

16. Method of Separation Between Light and Heavy Groups of Primary CR Nuclei by LDF of Cherenkov Light in the Range 300–3000 TeV

Author

A S Elshoukrofy, L Sveshnikova, E Postnikov, I Astapov, P Bezyazeekov, V Boreyko, A Borodin, M Brueckner, N Budnev, A Chiavassa, A Dyachok, O Fedorov, A Gafarov, A Garmash, N Gorbunov, V Grebenyuk, O Gress, T Gress, O Grishin, A Grinyuk, D Horns, A Ivanova, N Kalmykov, Y Kazarina, V Kindin, S Kiryuhin, P Kirilenko, R Kokoulin, K Kompaniets, E Korosteleva, V Kozhin, E Kravchenko, M Kunnas, L Kuzmichev, Y Lemeshev, V Lenok, B Lubsandorzhiev, N Lubsandorzhiev, R Mirgazov, R Mirzoyan, R Monkhoev, R Nachtigall, E Osipova, A Pakhorukov, M Panasyuk, L Pankov, A Petrukhin, V Poleschuk, M Popescu, E Popova, A Porelli, V Prosin, V Ptuskin, E Rjabov, G Rubtsov, A Pushnin, Y Sagan, B Sabirov, V Samoliga, Y Semeney, A Silaev, A Silaev Jr, A Sidorenkov, A Skurikhin, V Slunecka, A Sokolov, C Spiering, V Tabolenko, B Tarashansky, A Tkachenko, L Tkachev, M Tluczykont, R Wischnewski, A Zagorodnikov, D Zhurov, V Zurbanov, I Yashin, A A Darwish, and H A Motaweh

Subjects
Physics, Range (particle radiation), Distribution function, Primary (astronomy), Astrophysics::High Energy Astrophysical Phenomena, Separation (aeronautics), Measurement uncertainty, Energy (signal processing), Cherenkov radiation, Computational physics, Parametric statistics
Abstract

The problem of chemical composition below the knee in the cosmic-ray energy spectrum has not yet been solved due to low statistics collected from direct experiments. In the HiSCORE experiment the lateral distribution functions (LDF) of Cherenkov light of EASs with energy greater than hundreds of TeV can be measured in detail for millions of individual events. A full steepness of LDF is sensitive to the depth of shower maximum and as a result to primary particle type. In this paper, we developed a parametric method of separation between heavy and light groups of nuclei using the ’knee-like’ approximation of LDF and taking into account measurement uncertainty.

Published
2018

17. Search for relativistic magnetic monopoles with the Baikal neutrino telescope

Author

V. Aynutdinov, A. Avrorin, V. Balkanov, I. Belolaptikov, N. Budnev, I. Danilchenko, G. Domogatsky, A. Doroshenko, A. Dyachok, Zh.-A. Dzhilkibaev, S. Fialkovsky, O. Gaponenko, K. Golubkov, O. Gress, T. Gress, O. Grishin, A. Klabukov, A. Klimov, A. Kochanov, K. Konischev, A. Koshechkin, L. Kuzmichev, V. Kulepov, E. Middell, S. Mikheyev, M. Milenin, R. Mirgazov, E. Osipova, G. Pan’kov, L. Pan’kov, A. Panfilov, D. Petukhov, E. Pliskovsky, P. Pokhil, V. Poleschuk, E. Popova, V. Prosin, M. Rozanov, V. Rubtzov, A. Sheifler, B. Shoibonov, A. Shirokov, Ch. Spiering, B. Tarashansky, R. Wischnewski, I. Yashin, and V. Zhukov

Subjects
Astrophysics::High Energy Astrophysical Phenomena, ddc:540, Astronomy and Astrophysics
Published
2008

18. The TAIGA experiment: from cosmic ray to gamma-ray astronomy in the Tunka valley

Author

N Budnev, I Astapov, P Bezyazeekov, A Bogdanov, V Boreyko, M Büker, M Brückner, A Chiavassa, O Chvalaev, O Gress, T Gress, O Grishin, A Dyachok, S Epimakhov, O Fedorov, A Gafarov, N Gorbunov, V Grebenyuk, A Grinuk, A Haungs, R Hiller, D Horns, T Huege, A Ivanova, A Kalinin, N Karpov, N Kalmykov, Y Kazarina, N Kirichkov, S Kiryuhin, M Kleifges, R Kokoulin, K Komponiest, A Konstantinov, E Korosteleva, D Kostunin, V Kozhin, O Krömer, M Kunnas, L Kuzmichev, V Lenok, B Lubsandorzhiev, N Lubsandorzhiev, R Mirgazov, R Mirzoyan, R Monkhoev, R Nachtigall, A Pakhorukov, M Panasyuk, L Pankov, A Perevalov, A Petrukhin, V Platonov, V Poleschuk, E Popova, A Porelli, V Prosin, V Ptuskin, G Rubtsov, A Pushnin, V Samoliga, P Satunin, F Schröder, Yu Semeney, A Silaev, A Skurikhin, V Slucka, C Spiering, L Sveshnikova, V Tabolenko, B Tarashansky, A Tkachenko, L Tkachev, M Tluczykont, D Voronin, R Wischnewski, A Zagorodnikov, V Zurbanov, and I Yashin

Subjects
Physics, History, Muon, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Taiga, Detector, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy, Cosmic ray, Astrophysics, Gamma-ray astronomy, 01 natural sciences, Computer Science Applications, Education, 0103 physical sciences, High Energy Physics::Experiment, ddc:620, 010306 general physics, Engineering & allied operations, Cherenkov radiation, Muon detector, Lepton
Abstract

The physical motivations and advantages of the new gamma-observatory TAIGA (Tunka Advanced Instrument for cosmic ray physics and Gamma Astronomy) is presented. The TAIGA array is a complex, hybrid detector for ground-based gamma-ray astronomy for energies from a few TeV to several PeV as well as for cosmic ray studies from 100 TeV to several EeV. The TAIGA will include the wide angle Cherenkov array TAIGA-HiSCORE with ~5 km$^{2}$ area, a net of 16 IACT telescopes (with FOV of about 10x10 degree), muon detectors with a total area of up to 2000-3000 m$^{2}$ and the radio array Tunka-Rex.

Published
2016

19. Simultaneous measurements of water optical properties by AC9 transmissometer and ASP-15 Inherent Optical Properties meter in Lake Baikal

Author

V. Balkanov, I. Belolaptikov, L. Bezrukov, N. Budnev, A. Capone, A. Chensky, I. Danilchenko, G. Domogatsky, Zh.-A. Dzhilkibaev, S. Fialkovsky, O. Gaponenko, O. Gress, T. Gress, R. Il'yasov, A. Klabukov, A. Klimov, S. Klimushin, K. Konischev, A. Koshechkin, Vy. Kuznetzov, L. Kuzmichev, V. Kulepov, B. Lubsandorzhiev, R. Masullo, E. Migneco, S. Mikheyev, M. Milenin, R. Mirgazov, N. Moseiko, E. Osipova, A. Panfilov, L. Pan'kov, Yu. Parfenov, A. Pavlov, M. Petruccetti, E. Pliskovsky, P. Pokhil, V. Poleschuk, E. Popova, V. Prosin, G. Riccobene, M. Rozanov, V. Rubtzov, Yu. Semeney, Ch. Spiering, O. Streicher, B. Tarashansky, R. Vasiljev, R. Wischnewski, I. Yashin, and V. Zhukov

Subjects
Nuclear and High Energy Physics, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Astrophysics, ac9, baikal, Physics::Geophysics, Mediterranean sea, Metre, Instrumentation, attenuation, Cherenkov radiation, Remote sensing, Transmissometer, absorption, asp-15, nemo, neutrino telescope, Physics, Scattering, Attenuation, Astrophysics (astro-ph), Astrophysics::Instrumentation and Methods for Astrophysics, Neutrino detector, Neutrino
Abstract

Measurements of optical properties in media enclosing Cherenkov neutrino telescopes are important not only at the moment of the selection of an adequate site, but also for the continuous characterization of the medium as a function of time. Over the two last decades, the Baikal collaboration has been measuring the optical properties of the deep water in Lake Baikal (Siberia) where, since April 1998, the neutrino telescope NT-200 is in operation. Measurements have been made with custom devices. The NEMO Collaboration, aiming at the construction of a km3 Cherenkov neutrino detector in the Mediterranean Sea, has developed an experimental setup for the measurement of oceanographic and optical properties of deep sea water. This setup is based on a commercial transmissometer. During a joint campaign of the two collaborations in March and April 2001, light absorption, scattering and attenuation in water have been measured. The results are compatible with previous ones reported by the Baikal Collaboration and show convincing agreement between the two experimental techniques., Comment: 16 pages, submitted to NIM-A

Published
2002
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20. TAIGA observatory: IACT fabrication and tests

Author

Yaroslav Sagan, I. Astapov, Pavel Bezyazeekov, A. Borodin, M. Brueckner, N. M. Budnev, A. Chiavassa, A. N. Dyachok, O. Fedorov, A. R. Gafarov, A. Garmash, V. Grebenyuk, O. Gress, T. I. Gress, A. Grinyuk, O. Grishin, Dieter Horns, A. Ivanova, N. Kalmykov, Y. Kazarina, V. Kindin, P. Kirilenko, S. Kiryuhin, R. Kokoulin, K. Kompaniets, E. Korosteleva, Vladimir V Kozhin, E. Kravchenko, M. Kunnas, L. Kuzmichev, Yu. Lemeshev, V. Lenok, N. Lubsandorzhiev, B. Lubsandorzhiev, R. R. Mirgazov, R. Mirzoyan, R. Monkhoev, R. Nachtigall, E. Osipova, A. Pakhorukov, A. Pan, M. I. Panasyuk, L. Pankov, A. Petrukhin, V. Poleschuk, E. Popescu, E. Popova, A. Porelli, E. Postnikov, V. Prosin, V. Ptuskin, A. Pushnin, E. Rjabov, G. Rubtsov, B. Sabirov, V. Samoliga, Andrei Sidorenkov, A. Silaev, A. Silaev(junior), V. Slunecka, A. V. Skurikhin, A. Sokolov, Y. Suvorkin, L. Sveshnikova, V. A. Tabolenko, A. Tanaev, B. Tarashansky, L. Tkachev, M. Tluczykont, R. Wishnevski, I. Yashin, A. Zagorodnikov, and D. Zhurov

Subjects
Physics, Fabrication, Observatory, Gamma ray, Astronomy, Cosmic ray, IACT, Cherenkov radiation
Abstract

Imaging Atmospheric Cherenkov Telescopes (IACTs) are one of the key parts of the TAIGA observatory, which is designed to study gamma rays and charged cosmic rays in the energy range of 10^13 eV – 10^18 eV. The current prototype phase comprises three IACTs. The first IACT was fabricated at JINR, Dubna, and started its first commissioning season in the Tunka valley in 2017. The second one has been assembled there in fall 2018, the third structure one is ready for installation in autumn 2019. This report presents the main TAIGA IACT characteristics and results from pointing performance studies in the last 2 seasons. We also describe R&D activities started to fabricate focusing glass mirrors at JINR, and give results for the first prototypes measurements.

21. Commissioning the joint operation of the wide angle timing HiSCORE Cherenkov array with the first IACT of the TAIGA experiment

Author

Lyubov Sveshnikova, E. Postnikov, I. Astapov, Pavel Bezyazeekov, V. Boreyko, A. Borodin, M. Brueckner, N. M. Budnev, A. Chiavassa, Aleksei Nikolaevich Dyachok, A.S. Elshoukrofy, O. Fedorov, Aleksandr Gafarov, A. Garmash, N. Gorbunov, Victor Grebenyuk, O. Gress, T. I. Gress, O. Grishin, A. Grinyuk, Dieter Horns, A. Ivanova, N. Kalmykov, Y. Kazarina, V. Kindin, S. Kiryuhin, R. Kokoulin, K. Kompaniets, E. Korosteleva, Vladimir V Kozhin, E. Kravchenko, M. Kunnas, L. Kuzmichev, Yu. Lemeshev, V. Lenok, B. Lubsandorzhiev, N. Lubsandorzhiev, Rashid Mirgazov, Razmik Mirzoyan, R. Monkhoev, R. Nachtigall, E. Osipova, A. Pakhorukov, M. I. Panasyuk, Leonid Pankov, A. Petrukhin, V. Poleschuk, E. Popescu, E. Popova, A. Porelli, V. Prosin, V. Ptuskin, Evgenii V Rjabov, G. Rubtsov, A. Pushnin, Yaroslav Sagan, B. Sabirov, V. Samoliga, Yu. Semeney, A. Silaev, A. Silaev(junior), Andrei Sidorenkov, Aleksandr Vasilevich Skurihin, V. Slunecka, A. V. Sokolov, C. Spiering, V. A. Tabolenko, B. Tarashansky, A. Tkachenko, L. Tkachev, M. Tluczykont, R. Wischnewski, Aleksey Zagorodnikov, D. Zhurov, Valery Zurbanov, and I. Yashin

Subjects
Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Detector, Astrophysics::Instrumentation and Methods for Astrophysics, IACT, Cosmic ray, Coincidence, law.invention, Telescope, law, Hybrid array, Environmental science, Image resolution, Cherenkov radiation, Remote sensing
Abstract

The first IACT as part of the gamma and cosmic-ray experiment TAIGA was installed in the Tunka Valley near Lake Baikal in fall 2016. In the following months different systems of the telescope were put into test operation. We started the commissioning phase of operating the telescope in time coincidence with the wide angle integrating air Cherenkov HiSCORE array, which for the time being comprises 28 working stations. We anticipate that the hybrid operation of the non-imaging and imaging telescopes will lead to a cost-efficient, highly sensitive detector operating in the energy range from 30-50 TeV till several PeV. Here we want to report on the first test results of operating the prototype hybrid array. We will focus on the analysis of count rates and image size spectra for all events detected by the IACT and the joint events detected also by the HiSCORE array, comparing these with expectations from MC simulations.

22. Search for gamma-ray emission above 50 TeV from Crab Nebula with the TAIGA detector

Author

Lyubov Sveshnikova, I. Astapov, Pavel Bezyazeekov, V. Boreyko, A. Borodin, M. Brueckner, N. M. Budnev, A. Chiavassa, Aleksei Nikolaevich Dyachok, O. Fedorov, Aleksandr Gafarov, N. Gorbunov, Victor Grebenyuk, O. Gress, T. I. Gress, O. Grishin, A. Grinyuk, Dieter Horns, A. Ivanova, N. Kalmykov, Y. Kazarina, V. Kindin, S. Kiryuhin, R. Kokoulin, K. Kompaniets, E. Korosteleva, Vladimir V Kozhin, E. Kravchenko, M. Kunnas, L. Kuzmichev, Yu. Lemeshev, V. Lenok, B. Lubsandorzhiev, N. Lubsandorzhiev, Rashid Mirgazov, Razmik Mirzoyan, R. Monkhoev, R. Nachtigall, E. Osipova, A. Pakhorukov, M. I. Panasyuk, Leonid Pankov, A. Petrukhin, V. Poleschuk, E. Popescu, E. Popova, A. Porelli, E. Postnikov, V. Prosin, V. Ptuskin, Evgenii V Rjabov, G. Rubtsov, A. Pushnin, Yaroslav Sagan, B. Sabirov, V. Samoliga, Yu. Semeney, A. Silaev, A. Silaev(junior), Andrei Sidorenkov, Aleksandr Vasilevich Skurihin, V. Slunecka, A. V. Sokolov, C. Spiering, V. A. Tabolenko, B. Tarashansky, A. Tkachenko, L. Tkachev, M. Tluczykont, R. Wischnewski, Aleksey Zagorodnikov, D. Zhurov, Valery Zurbanov, and I. Yashin

Subjects
Physics, Crab Nebula, Observatory, Astrophysics::High Energy Astrophysical Phenomena, Detector, Astrophysics::Instrumentation and Methods for Astrophysics, Extrapolation, Gamma ray, Cosmic ray, Angular resolution, Astrophysics, Cherenkov radiation
Abstract

The TAIGA (Tunka Advanced Instrument for cosmic rays and Gamma-Astronomy) observatory is designed to study the gamma ray sources and galactic cosmic rays. It is located in the Tunka Valley 50 km from the lake Baikal (Siberia). The first part of TAIGA called the EAS Cherenkov array TAIGA-HiSCORE currently consists of 28 wide-angle (0.6 sr) stations, distributed over an area of 0.25 km^2. The Crab observation exposure was about 115 hours during the winter seasons of 2016-2017. The expected gamma quanta excess depends on the array energy threshold and a model of the Crab energy spectrum extrapolation to the higher energies. We present preliminary results of experimental data and MC simulations comparison as well as energy threshold and angular resolutions. The experimental data is in a good agreement with the simulations. An excess of events (about 25 events in the region 30-63 TeV) observed from the Crab direction is compatible with the expected one.

23. Camera of the first TAIGA-IACT: Construction and calibration

Author

Nima Lubsandorzhiev, I. Astapov, Pavel Bezyazeekov, V. Boreyko, A. Borodin, M. Brueckner, N. M. Budnev, A. Chiavassa, Aleksei Nikolaevich Dyachok, O. Fedorov, Aleksandr Gafarov, A. Garmash, N. Gorbunov, Victor Grebenyuk, O. Gress, T. I. Gress, O. Grishin, A. Grinyuk, Dieter Horns, A. Igoshin, A. Ivanova, N. Kalmykov, Y. Kazarina, V. Kindin, P. Kirilenko, S. Kiryuhin, R. Kokoulin, K. Kompaniets, E. Korosteleva, Vladimir V Kozhin, E. Kravchenko, M. Kunnas, L. Kuzmichev, Yu. Lemeshev, V. Lenok, B. Lubsandorzhiev, Rashid Mirgazov, Razmik Mirzoyan, R. Monkhoev, R. Nachtigall, E. Osipova, A. Pakhorukov, M. I. Panasyuk, Leonid Pankov, A. Petrukhin, V. Poleschuk, E. Popescu, E. Popova, A. Porelli, E. Postnikov, V. Prosin, V. Ptuskin, Evgenii V Rjabov, G. Rubtsov, A. Pushnin, Yaroslav Sagan, B. Sabirov, V. Samoliga, Yu. Semeney, A. Silaev, A. Silaev(junior), Andrei Sidorenkov, Aleksandr Vasilevich Skurihin, V. Slunecka, A. V. Sokolov, C. Spiering, L. Sveshnikova, V. A. Tabolenko, B. Tarashansky, A. Tkachenko, L. Tkachev, M. Tluczykont, R. Wischnewski, Aleksey Zagorodnikov, D. Zhurov, Valery Zurbanov, and I. Yashin

Subjects
Physics, Photomultiplier, business.industry, Detector, IACT, law.invention, Telescope, Data acquisition, Optics, law, Calibration, Focal length, business, Cherenkov radiation
Abstract

The first imaging atmospheric Cherenkov telescope as a part of the TAIGA (Tunka Advanced Instrument for cosmic rays and Gamma Astronomy) detector was put into commission in the Tunka valley in December 2016. The reflector of the telescope follows the Davis-Cotton design. It is composed of 34 glassmirror tiles, each of 60 cm diameter, and has a diameter of 4.3 m. The focal length is 4.75 m. The imaging camera includes 560 photomultiplier-based pixels, providing a FoV of ~10×10 degrees. The imaging camera is made by using a modular principle and includes trigger, data acquisition and processing systems based on MAROC3 chips. The slow control system monitors the count rate and the PMT anode currents as well as controls the high voltage. For monitoring performance of the camera a dedicated calibration system based on nanosecond pulsed LED light source was developed.

24. In situ measurements of optical parameters in Lake Baikal with the help of a Neutrino telescope.

Author

Balkanov V, Belolaptikov I, Bezrukov L, Chensky A, Budnev N, Danilchenko I, Dzhilkibaev ZA, Domogatsky G, Doroshenko A, Fialkovsky S, Gaponenko O, Garus A, Gress T, Karle A, Klabukov A, Klimov A, Klimushin S, Koshechkin A, Kulepov V, Kuzmichev L, Lubsandorzhiev B, Lovzov S, Mikolajski T, Milenin M, Mirgazov R, Moroz A, Moseiko N, Nikiforov S, Osipova E, Pandel D, Panfilov A, Parfenov Y, Pavlov A, Petukhov D, Pokhil P, Pokolev P, Popova E, Rozanov M, Rubzov V, Sokalski I, Spiering C, Streicher O, Tarashansky B, Thon T, Wischnewski R, and Yashin I

Abstract

We present results of an experiment performed in Lake Baikal at a depth of approximately 1 km. The photomultipliers of an underwater neutrino telescope under construction at this site were illuminated by a distant laser. The experiment not only provided a useful cross-check of the time calibration of the detector but also allowed us to determine inherent optical parameters of the water in a way that was complementary to standard methods. In 1997 we measured an absorption length of 22 m and an asymptotic attenuation length of 18 m. The effective scattering length was measured as 480 m. By use of (cos theta) = 0.95 (0.90) for the average scattering angle, this length corresponds to a geometric scattering length of 24 (48) m.

Published
1999
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