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21.
Evidence for a supergalactic structure of magnetic deflection multiplets of ultra-high-energy cosmic rays
R. U. Abbasi, Mitsuhiro Abe, T. Abu-Zayyad, M. Allen, R. Azuma, E. Barcikowski, J. W. Belz, Douglas R. Bergman, S. A. Blake, Jon Paul Lundquist, 2020, original scientific article

Abstract: Evidence for a large-scale supergalactic cosmic-ray multiplet (arrival directions correlated with energy) structure is reported for ultra-high-energy cosmic-ray (UHECR) energies above 1019 eV using 7 years of data from the Telescope Array (TA) surface detector and updated to 10 years. Previous energy–position correlation studies have made assumptions regarding magnetic field shapes and strength, and UHECR composition. Here the assumption tested is that, because the supergalactic plane is a fit to the average matter density of the local large-scale structure, UHECR sources and intervening extragalactic magnetic fields are correlated with this plane. This supergalactic deflection hypothesis is tested by the entire field-of-view (FOV) behavior of the strength of intermediate-scale energy–angle correlations. These multiplets are measured in spherical cap section bins (wedges) of the FOV to account for coherent and random magnetic fields. The structure found is consistent with supergalactic deflection, the previously published energy spectrum anisotropy results of the TA (the Hotspot and Coldspot), and toy-model simulations of a supergalactic magnetic sheet. The seven year data posttrial significance of this supergalactic structure of multiplets appearing by chance, on an isotropic sky, is found by Monte Carlo simulation to be 4.2σ. The 10 years of data posttrial significance is 4.1σ. Furthermore, the starburst galaxy M82 is shown to be a possible source of the TA Hotspot, and an estimate of the supergalactic magnetic field using UHECR measurements is presented.
Keywords: extragalactic magnetic fields, ultra-high-energy cosmic radiation, cosmic rays, high energy astrophysics, astrophysical magnetism, cosmic ray astronomy, cosmic ray sources
Published in RUNG: 05.02.2021; Views: 2414; Downloads: 125
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22.
High-energy emission from a magnetar giant flare in the Sculptor galaxy
Gabrijela Zaharijas, 2021, original scientific article

Keywords: magnetars, gamma-ray astronomy, transients
Published in RUNG: 14.01.2021; Views: 2096; Downloads: 0
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Fermi Large Area Telescope fourth source catalog
S. Abdollahi, Fabio Acero, M. Ajello, W. B. Atwood, M. Axelsson, L. Baldini, J. Ballet, G. Barbiellini, D. Bastieri, Gabrijela Zaharijas, 2020, original scientific article

Keywords: astronomy, gamma rays, sky surveys
Published in RUNG: 22.05.2020; Views: 2780; Downloads: 200
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Multimessenger observations of a flaring blazar coincident with high-energy neutrino IceCube-170922A
Gabrijela Zaharijas, 2018, original scientific article

Keywords: neutrino astronomy, multi-messenger astronomy
Published in RUNG: 04.09.2018; Views: 3041; Downloads: 0
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28.
Member of the evaluation committee in charge of awarding with the European mention the doctoral thesis of Dr. Ignacio Vegas Azcárate
Serguei Vorobiov, other performed works

Abstract: I cooperated with the Department of Applied Physics III, Faculty of Physics of the Universidad Complutense of Madrid, Spain, as a member of the evaluation committee in charge of awarding with the European mention the doctoral thesis of Dr. Ignacio Vegas Azcárate, entitled “Nanosecond range pulse generators for quality control and diagnosis of Cherenkov telescope cameras”.
Keywords: very-high energy gamma-ray astronomy, imaging atmospheric Cherenkov telescopes (IACTs), IACT camera quality control and diagnostics, nanosecond range pulse generators
Published in RUNG: 06.03.2018; Views: 4397; Downloads: 0
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29.
Почетен курс по астрономија (5): Астрономски карти и соѕвездија
Tanja Petrushevska, 2009, popular article

Abstract: Визијата на оваа 2009 година, прогласена за Меѓународна година на астрономијата, е луѓето да го пронајдат своето место во универзумот преку небото. Гледајќи го ноќното небо, сјајните ѕвезди изгледа дека формираат фигури кои наликуваат на нешто: различни митолошки суштества и други животни, а подоцна и на различни модерни предмети. Ова групирање на ѕвездите во соѕвездија е продукт на човечката фантазија и нема никаква физичка основа. Различни култури имаат различни соѕвездија, во зависност од нивната митологија, историја и средина.
Keywords: introductory course of astronomy
Published in RUNG: 29.01.2018; Views: 2544; Downloads: 0
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30.
Почетен курс по астрономија (4): Уште астрономски објекти
Tanja Petrushevska, 2009, popular article

Abstract: Леопарди во 1813 година забележал: "Највозвишената и најблагородната од сите науки без сомнеж е астрономијата. Човекот се издигнува со помош на неа и над самиот себе, и стигнува да ја разбере причината на најизвонредни феномени." 2009 година е прогласена за Меѓународната година на астрономијата од УНЕСКО и таа ширум светот се одбележува со мноштво активности. Дел од тие активности во Македонија е и овој наш почетен курс по астрономија, со кој сакаме да поттикнеме што повеќе наши сограѓани да ја следат и практикуваат астрономијата. Во овој број ќе читате за бели џуџиња, неутронски ѕвезди, црни дупки, Млечниот пат, галактички јата…
Keywords: introductory course of astronomy
Published in RUNG: 29.01.2018; Views: 2481; Downloads: 0
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