Персона:
Архангельская, Ирина Владимировна

Научные группы

Научная группа

Институт космофизики (ИНКОС) (Кафедра №7)

Организационные подразделения

Организационная единица

Цель ИЯФиТ и стратегия развития - создание и развитие научно-образовательного центра мирового уровня в области ядерной физики и технологий, радиационного материаловедения, физики элементарных частиц, астрофизики и космофизики.

Фамилия

Архангельская

Имя

Ирина Владимировна

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Теперь показываю 1 - 10 из 33

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Characteristic for long GRBs with high energy component presence, which not required cosmological corrections
(2020) Arkhangelskaja, I. V.; Архангельская, Ирина Владимировна
© Published under licence by IOP Publishing Ltd.Several thousands of gamma-ray bursts were observed by various experiments. During several GRBs very high-energy photons were detected both in space and ground-based experiments (up to some tens of GeV and up to some TeV, respectively). Usually 2 classes of bursts are considered: short and long GRBs separated by t90∼2s. Because of several hundreds of GRBs located at high redshift, its sources' origins nature concluding as cosmological. Therefore correction to cosmological dilation of GRBs t90 should be considered during any analysis of bursts duration. Firstly very high-energy component was observed during GRB 970417a: 18 photons with energy ∼650 GeV were registered by Milagrito within t90 interval of this burst. Now several tens of GRBs reveal activity in energy bands up to some tens of GeV and up to some TeV accordingly data of space and ground-based experiments correspondingly. Unfortunately redshift is unknown approximately for half of GRBs with high energy component presence. Here we introduce new parameter Rt is ratio of maximum energy photon arrival time to burst duration and it not required cosmological correction. At least 2 groups of long GRBs could be separated using parameter Rt: for 25% events highest energy gammas detected within t 90 interval, but for other 75% of bursts it registered more than 10 sec. later than one. Moreover, preliminary results of analysis allow concluding 2 subtypes of second group GRBs. For one μ-quantum with maximum energy arrived within t90. For other such photon was registered later than t90. Therefore, the results of preliminary analyses allow conclude long GRBs population inhomogeneity.
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Rich Galaxy Clusters from CfA2 Redshift Survey: Spatial Dynamic and High-Energy Gamma-Emission
(2020) Khanh, L. N.; Arkhangelskaja, I. V.; Galper, A. M.; Dorosheva, D. N.; Архангельская, Ирина Владимировна
© 2020, Pleiades Publishing, Ltd.Abstract: Preliminary results of the investigation of the characteristics of 5 groups of galaxies are discussed in the presented article. We have analyzed the main characteristics of galaxy clusters 933, 88, 142, 1046, 1101 from CfA2 redshift survey. Clusters 933, 142, 1046, and 1652 have high-energy gamma associations on Fermi/LAT data (4FGL J1144.9 + 1937, 4FGL J0152.2 + 3714, 4FGL J1230.8 + 1223 and 4FGL J1653.8 + 3945). These sources are active galaxies. Furthermore, the radiogalaxy 3C 264 (4FGL J1144.9 + 1937) was previously observed in the energy band E>1 TeV. We have found several anomalies of the spatial dynamics of galaxies in these clusters. These features could be caused by the dynamics of galaxies’ motion in a gravitationally bound group taking into account possible space–time inhomogeneities at large distances. Investigation of high-energy gamma-emission of galaxies and peculiarities of its motion in groups allows studying properties of such inhomogeneities and understanding of its nature possibly caused by dark matter. The investigation of the spatial distribution and other characteristics of 933, 88, 142, 1046, 1101 galaxy clusters shows gravitational lensing effect. But now it is unknown which objects are gravitational lenses for these clusters. The angular size of such clusters is about 1–2 degree and now there are not clear associations between group members of clusters 142, 1046, and 1652 with the high-energy gamma-sources 4FGL J0152.2 + 3714, 4FGL J1230.8 + 1223, and 4FGL J1653.8 + 3945. Common observations of such clusters by orbital gamma-ray observatories with high angular resolution and ground-based Cherenkov air-shower experiments could possibly clarify the type of gravitational lenses.
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The Anticoincidence System of Space-Based Gamma-Ray Telescope GAMMA-400, Test Beam Studies of Anticoincidence Detector Prototype with SiPM Readout
(2020) Bakaldin, A. V.; Dalkarov, O. D.; Egorov, A. E.; Gusakov, Y. V.; Arkhangelskiy, A. I.; Galper, A. M.; Arkhangelskaja, I. V.; Chernysheva, I. V.; Kheymits, M. D.; Leonov, A. A.; Runtso, M. F.; Yurkin, Y. T.; Архангельский, Андрей Игоревич; Архангельская, Ирина Владимировна; Чернышева, Ирина Вячеславовна; Хеймиц, Максим Дмитриевич; Леонов, Алексей Анатольевич; Юркин, Юрий Тихонович
© 2020, Pleiades Publishing, Ltd.Abstract: The GAMMA-400 gamma-ray telescope is planned for the launch at the end of 2026 on the Navigator service platform designed by Lavochkin Association on an elliptical orbit with following initial parameters: an apogee ̴300 000, a perigee ̴500 km, a rotation period ̴7 days and inclination of 51.4̊. The apparatus is expected to operate for more than 5 years, reaching an unprecedented sensitivity for the search of dark matter signatures and the study of the unresolved and so far unidentified gamma-ray sources. The segmented anticoincidence counters surround the converter-tracker and calorimeter of the telescope with the purpose of vetoing to assure a clean track reconstruction and charged particle background suppression. The anticoincidence detector prototype based on long BC-408 scintillator with silicon photomultipliers readout was tested using 300-MeV positron beam of synchrotron C-25P ‘‘PAKHRA’’ of Lebedev Physical Institute. The measurement setup, design concepts for the prototype detector together with test results are discussed.
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The Future Space-Based GAMMA-400 Gamma-Ray Telescope for Studying Gamma and Cosmic Rays
(2019) Topchiev, N. P.; Bakaldin, A. V.; Gusakov, Y. V.; Dalkarov, O. D.; Galper, A. M.; Arkhangelskaja, I. V.; Arkhangelskiy, A. I.; Leonov, A. A.; Naumov, P. Y.; Runtso, M. F.; Kheymits, M. D.; Chernysheva, I. V.; Yurkin, Y. T.; Архангельская, Ирина Владимировна; Архангельский, Андрей Игоревич; Леонов, Алексей Анатольевич; Наумов, Петр Юрьевич; Хеймиц, Максим Дмитриевич; Чернышева, Ирина Вячеславовна; Юркин, Юрий Тихонович
© 2019, Allerton Press, Inc.Abstract: The future space-based γ-ray telescope GAMMA-400 will be installed on the Navigator platform of the Russian astrophysical observatory. A highly elliptical orbit will allow prolonged (~100 days) continuous observations of many regions of the celestial sphere for 7–10 years. GAMMA-400 will measure fluxes of γ‑ray emission in the energy range of ~20 MeV to several TeV and electrons + positrons to ~20 TeV. The γ-ray telescope will have excellent separation of γ-ray emissions against the background of cosmic rays and electrons + positrons from protons, along with unprecedented angular (~0.01° at Eγ = 100 GeV) and energy (~1% at Eγ = 100 GeV) resolutions 5–10 times better than for the Fermi-LAT and ground-based γ-ray telescopes. GAMMA-400 observations will provide fundamentally new data on discrete sources and spectra of γ-ray emissions and electrons + positrons.
Только метаданные
The Gamma-Ray Background Model for Detectors Onboard Low-Altitude and High-Inclination Satellites in the Energy Band up to Several MeV
(2019) Arkhangelskaja, I. V.; Arkhangelskiy, A. I.; Mikhailova, A. V.; Архангельская, Ирина Владимировна; Архангельский, Андрей Игоревич; Михайлова, Анна Владимировна
© 2019, Allerton Press, Inc.Abstract: Results are presented from an analysis of the temporal behavior of the background count rate in an energy band of up to several MeV for the γ-ray detectors onboard low-altitude satellites, using data of the AVS-F instrument as an example. The instrument was installed onboard the CORONAS-F satellite with orbital parameters of an altitude of ~500 km and an inclination of 82.5°. The temporal profiles of the background count rate in the equatorial orbit regions are approximated by fourth- or fifth-degree polynomials. The applicability of the approximating polynomials is shown for the instruments installed onboard satellites with orbital inclinations of up to 38°, allowing for the evolution of the Kp index in the preceding time interval of 12–24 h before passing the geomagnetic equator. In modeling the RHESSI data of October 27, 2003, at an initial orbital altitude of ~600 km and an inclination of 38°, a mean count rate value of 1017 ± 8 s−1 is obtained in the geomagnetic latitude interval ±5° in the energy range Е > 0.1 MeV (analysis of the data yields a value of 1094 ± 153 s−1).
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A System for Generating the Trigger Signals of the Spaceborne GAMMA-400 Telescope
(2019) Bakaldin, A. V.; Gusakov, Y. V.; Dalkarov, O. D.; Egorov, A. E.; Arkhangelskiy, A. I.; Galper, A. M.; Arkhangelskaja, I. V.; Leonov, A. A.; Runtso, M. F.; Kheymits, M. D.; Chasovikov, E. N.; Chernysheva, I. V.; Yurkin, Y. T.; Архангельский, Андрей Игоревич; Архангельская, Ирина Владимировна; Леонов, Алексей Анатольевич; Хеймиц, Максим Дмитриевич; Часовиков, Евгений Николаевич; Чернышева, Ирина Вячеславовна; Юркин, Юрий Тихонович
© 2019, Allerton Press, Inc.Abstract: The GAMMA-400 space project is one of the new generation of space observatories designed to search for signs of dark matter in the cosmic gamma emission, and to measure the characteristics of diffuse gamma-ray emission and gamma-rays from the Sun during periods of solar activity; gamma-ray bursts; extended and point gamma-ray sources; and electron, positron, and cosmic-ray nuclei fluxes with energies in the TeV ranges. The GAMMA-400 γ-ray telescope constitutes the core of the scientific instrumentation. The nature of the intended experiments imposes stringent requirements on the gamma telescope’s system of trigger signal formation, now being developed using the state-of-the-art logic devices and fast data links. The design concept of the system is discussed, along with the chosen engineering solutions and some experimental results obtained during the operation of the system prototype using a positron beam with energies of 100–300 MeV from the PAKHRA S-25R synchrotron at the Lebedev Physical Institute.
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Gammas and Charged Particles Identification in Lateral and Additional Apertures of GAMMA-400
(2019) Bakaldin, A. V.; Dalkarov, O. D.; Egorov, A. E.; Gusakov, Y. V.; Arkhangelskaja, I. V.; Arkhangelskiy, A. I.; Galper, A. M.; Chernysheva, I. V.; Chasovikov, E. N.; Kheymits, M. D.; Leonov, A. A.; Runtso, M. F.; Yurkin, Y. T.; Архангельская, Ирина Владимировна; Архангельский, Андрей Игоревич; Чернышева, Ирина Вячеславовна; Часовиков, Евгений Николаевич; Хеймиц, Максим Дмитриевич; Леонов, Алексей Анатольевич; Юркин, Юрий Тихонович
© 2019, Pleiades Publishing, Ltd.The GAMMA-400 (Gamma Astronomical Multifunctional Modular Apparatus) will be a new generation satellite gamma-observatory. The gamma-ray telescope GAMMA-400 consists of the anticoincidence system (top and lateral sections—ACtop and AClat), the converter-tracker (C), the time-of-flight system TOF (two sections S1 and S2), the position-sensitive and electromagnetic calorimeters (CC1 and CC2), the scintillation detectors of the calorimeter (S3 and S4) and lateral anticoincidence detectors of the calorimeter LD. Two apertures used for observation of transient events do not require the best angular resolution as for the gamma-ray bursts and solar flares from both upper and lateral directions. Additional aperture allows the particle registering from upper direction, which do not interact with converter-tracker and do not form a TOF signal. The lateral aperture allows registering of γ-quanta in perpendicular direction with respect to main axis of GAMMA-400 due to CC2, LD, S3, and S4. The thickness of CC2 in this direction is ∼44 X0 and this allows detection of gammas, electrons and positrons with energies up to 10 TeV. The results of calculation of the fractal dimension of temporal profiles of additional aperture prototype of GAMMA-400 during its calibration using secondary positron beam of the synchrotron C-25P “PAKHRA” of Lebedev Physical Institute confirm the absence of any correlation between the AC and CC1 characteristics and correspondence of additional aperture background to Poisson statistics or Erlang one with shape parameter up to 10.
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GAMMA-400 Gamma-Ray Observations in the GeV and TeV Energy Range
(2021) Topchiev, N. P.; Bakaldin, A. V.; Cherniy, R. A.; Dalkarov, O. D.; Galper, A. M.; Arkhangelskaja, I. V.; Arkhangelskiy, A. I.; Chernysheva, I. V.; Kheymits, M. D.; Korotkov, M. G.; Leonov, A. A.; Malinin, A. G.; Mikhailov, V. V.; Runtso, M. F.; Yurkin, Y. T.; Архангельская, Ирина Владимировна; Архангельский, Андрей Игоревич; Чернышева, Ирина Вячеславовна; Хеймиц, Максим Дмитриевич; Коротков, Михаил Геннадиевич; Леонов, Алексей Анатольевич; Малинин, Александр Геннадьевич; Михайлов, Владимир Владимирович; Юркин, Юрий Тихонович
© 2021, Pleiades Publishing, Ltd.Abstract: The future space-based GAMMA-400 γ-ray telescope will operate onboard the Russian astrophysical observatory in a highly elliptic orbit during 7 years. Observing γ-ray sources from Galactic plane, γ-ray bursts, γ-ray diffuse emission, γ rays from the Sun, and γ rays from dark matter particles will be performed uninterruptedly for a long time (∼100 days) in point-source mode in contrast to scanning mode for Fermi-LAT and other space- and ground-based instruments. GAMMA-400 will measure γ rays in the energy range from ∼20 MeV to several TeV units, have the unprecedented angular (∼0.01° at Eγ = 100 GeV) and energy (∼2% at Eγ =100 GeV) resolutions better than for Fermi-LAT, as well as ground-based γ-ray facilities, by a factor of 5–10, and perfectly separate γ rays from cosmic-ray background.
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Preliminary Results of Analysis of Properties of Long Gamma-Ray Bursts with High-Energy Components: The Inhomogeneity of Their Source Populations
(2021) Arkhangelskaja, I. V.; Архангельская, Ирина Владимировна
© 2021, Allerton Press, Inc.Abstract: Sources of gamma-ray bursts (GRBs) are detected at a high redshift z, testifying to their cosmological origin and thus requiring allowance for cosmological dilation in analyzing the distribution of their durations. New parameter Rt, the ratio of the arrival time of a maximum-energy photon to the duration of a burst, is introduced. The new parameter allows cosmological dilation to be ignored and at least two groups of long GRBs to be distinguished. Differences in the dynamics of the formation of high-energy γ-radiation for these groups demonstrates the inhomogeneity of their source populations.
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Сегментация изображений новообразований кожи с применением метода активных контуров
(2023) Воронин, А. Е.; Проничев, А. Н.; Никитаев, В. Г.; Соломатин, М. А.; Занегина, Т. П.; Архангельская, И. В.; Петухова, А. И.; Багнова, П. Ю.; Сошнина, А. В.; Тамразова, О. Б.; Сергеев, В. Ю.; Сергеев, Ю. Ю.; Петухова, Александра Ильинична; Проничев, Александр Николаевич; Соломатин, Михаил Андреевич; Архангельская, Ирина Владимировна; Никитаев, Валентин Григорьевич
Технологии компьютерного зрения активно внедряются в современную жизнь, в том числе в медицинскую практику. Развитие таких технологий привело к появлению компьютерных систем, позволяющих осуществлять детектирование и классификацию кожных заболеваний с качеством, сопоставимым и в некоторых случаях превышающим возможности человека. В статье раскрывается метод автоматической сегментации, на базе предоставленных врачами дерматоскопических изображений, полученных с применением цифрового оптического прибора – дерматоскопа. Главной целью разрабатываемой модели является выявление зоны новообразования и областей гиперпигментации на изображениях новообразований кожи для дальнейшей интеграции в системы поддержки принятия врачебных решений при диагностике меланомы. В результате проведенной работы был создан программный комплекс, позволяющий проводить сегментацию новообразования. В качестве демонстрации метода приведены экспериментальные исследования обнаружения границ меланомы и зон областей признаков на изображениях новообразований кожи. Разработанная система может применяться в диагностических научно-исследовательских и образовательных целях.