ZEU-EXP/AT

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2019-10-22
16:54
[PUBDB-2019-03728] Journal Article
et al
First Season of Operation of the TAIGA Hybrid Cherenkov Array
The Tunka-133 Cherenkov complex for recording extensive air showers (EAS) collected data over seven winters from 2009 to 2017. The differential energy spectra of all particles was acquired in the 6 × 1015–3 × 1018 eV range of energies over 2175 h. [...]
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2019-10-22
16:50
[PUBDB-2019-03727] Journal Article
et al
Energy Spectrum of Primary Cosmic Rays, According to TUNKA-133 and TAIGA-HiSCORE EAS Cherenkov Light Data
The Tunka-133 Cherenkov complex for recording extensive air showers (EAS) collected data over seven winters from 2009 to 2017. The differential energy spectra of all particles was acquired in the 6 × 1015–3 × 1018 eV range of energies over 2175 h. [...]
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2019-10-21
17:26
arXiv [PUBDB-2019-03719] Report/Journal Article
et al
Constraints on Gamma-Ray and Neutrino Emission from NGC 1068 with the MAGIC Telescopes
[arXiv:1906.10954]
Starburst galaxies and star-forming active galactic nuclei are among the candidate sources thought to contribute appreciably to the extragalactic gamma-ray and neutrino backgrounds. NGC 1068 is the brightest of the star-forming galaxies found to emit gamma-rays from 0.1 to 50 GeV. [...]
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2019-10-21
17:15
[PUBDB-2019-03717] Journal Article
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Monte Carlo Simulation of the TAIGA Experiment
The TAIGA (Tunka Advanced Instrument for cosmic ray physics and Gamma-ray Astronomy) experiment aims at observing gamma-rays in the energy range from 1 TeV to several 100 TeV. The operation of the observatory is based on a new hybrid approach that combines imaging air Cherenkov telescopes (IACTs) and wide-angle Cherenkov detectors (TAIGA-HiSCORE) for measuring times of extensive air shower (EAS) light front arrival. [...]
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2019-10-21
16:39
[PUBDB-2019-03716] Journal Article
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Measurement of the extragalactic background light using MAGIC and Fermi-LAT gamma-ray observations of blazars up to z = 1
We present a measurement of the extragalactic background light (EBL) based on a joint likelihood analysis of 32 gamma-ray spectra for 12 blazars in the redshift range z = 0.03–0.944, obtained by the MAGIC telescopes and Fermi-LAT. The EBL is the part of the diffuse extragalactic radiation spanning the ultraviolet, visible, and infrared bands. [...]
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2019-10-21
16:20
arXiv [PUBDB-2019-03715] Report/Journal Article
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Investigation of Two Fermi -LAT Gamma-Ray Blazars Coincident with High-energy Neutrinos Detected by IceCube
[arXiv:1901.10806]
After the identification of the gamma-ray blazar TXS 0506+056 as the first compelling IceCube neutrino source candidate, we perform a systematic analysis of all high-energy neutrino events satisfying the IceCube realtime trigger criteria. We find one additional known gamma-ray source, the blazar GB6J1040+0617, in spatial coincidence with a neutrino in this sample. [...]
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2019-09-23
16:19
OpenAccess [PUBDB-2019-03436] Journal Article
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Fermi-LAT Stacking Analysis Technique: An Application to Extreme Blazars and Prospects for their CTA Detection
We present a likelihood profile stacking technique based on the Fermi-Large Area Telescope (LAT) data to explore the γ-ray characteristics of Fermi-LAT undetected astrophysical populations. The pipeline is applied to a sample of γ-ray unresolved extreme blazars, i.e., sources with the highest synchrotron peak frequencies (${\nu }_{\mathrm{Syn}}^{\mathrm{peak}}\geqslant {10}^{17}\,\mathrm{Hz}$), and we report a cumulative γ-ray detection with more than 32σ confidence for 2 degrees of freedom. [...]
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2019-07-15
16:54
OpenAccess [PUBDB-2019-02726] Journal Article
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A Decade of Gamma-Ray Bursts Observed by Fermi -LAT: The Second GRB Catalog
The Large Area Telescope (LAT) aboard the Fermi spacecraft routinely observes high-energy emission from gamma-ray bursts (GRBs). Here we present the second catalog of LAT-detected GRBs, covering the first 10 yr of operations, from 2008 to 2018 August 4. [...]
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2019-07-15
16:44
OpenAccess [PUBDB-2019-02725] Journal Article
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Open Questions in Cosmic-Ray Research at Ultrahigh Energies
We review open questions and prospects for progress in ultrahigh-energy cosmic ray (UHECR) research, based on a series of discussions that took place during the “The High-Energy Universe: Gamma-Ray, Neutrino, and Cosmic-ray Astronomy” MIAPP workshop in 2018. Specifically, we overview open questions on the origin of the bulk of UHECRs, the UHECR mass composition, the origin of the end of the cosmic-ray spectrum, the transition from Galactic to extragalactic cosmic rays, the effect of magnetic fields on the trajectories of UHECRs, anisotropy expectations for specific astrophysical scenarios, hadronic interactions, and prospects for discovering neutral particles as well as new physics at ultrahigh energies [...]
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2019-07-15
16:34
OpenAccess [PUBDB-2019-02724] Preprint/Report
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Fundamental Physics with High-Energy Cosmic Neutrinos
[arXiv:1903.04333]
 GO
High-energy cosmic neutrinos can reveal new fundamental particles and interactions, probing energy and distance scales far exceeding those accessible in the laboratory. This white paper describes the outstanding particle physics questions that high-energy cosmic neutrinos can address in the coming decade. [...]
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