ZEU-EXP/AT

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2018-06-18
16:05
[PUBDB-2018-02321] Journal Article
; ; ; et al
Limits on the flux of tau neutrinos from 1 PeV to 3 EeV with the MAGIC telescopes
A search for tau neutrino induced showers with the MAGIC telescopes is presented. The MAGIC telescopes located at an altitude of 2200 m a.s.l [...]
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ddc:540
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2018-05-22
14:04
OpenAccess [PUBDB-2018-02028] Report/Journal Article
; ; ; et al
Constraints on particle acceleration in SS433/W50 from MAGIC and H.E.S.S. observations
[arXiv:1707.03658]
Context. The large jet kinetic power and non-thermal processes occurring in the microquasar SS 433 make this source a good candidate for a very high-energy (VHE) gamma-ray emitter. [...]
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ddc:520
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2018-04-23
13:52
OpenAccess [PUBDB-2018-01827] Report/Journal Article
; ; ; et al
Multiwavelength Observations of the Blazar BL Lacertae: A New Fast TeV Gamma-Ray Flare
[arXiv:1802.10113]
Combined with measurements made by very-long-baseline interferometry, the observations of fast TeV gamma-ray flares probe the structure and emission mechanism of blazar jets. However, only a handful of such flares have been detected to date, and only within the last few years have these flares been observed from lower-frequency-peaked BL Lac objects and flat-spectrum radio quasars. [...]
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ddc:520
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2018-04-23
11:48
OpenAccess [PUBDB-2018-01820] Journal Article
; ; ; et al
Hadronic Origin of Prompt High-energy Emission of Gamma-ray Bursts Revisited: In the Case of a Limited Maximum Proton Energy
The high-energy (>100 MeV) emission observed by the Fermi Large Area Telescope during the prompt phase of some luminous gamma-ray bursts (GRBs) could arise from the cascade induced by interactions between accelerated protons and the radiation field of GRBs. The photomeson process, which is usually suggested to operate in such a hadronic explanation, requires a rather high proton energy (>10$^{17}$ eV) for an efficient interaction. [...]
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ddc:520
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2018-04-23
11:33
OpenAccess [PUBDB-2018-01814] Journal Article
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A Strong Limit on the Very-high-energy Emission from GRB 150323A
On 2015 March 23, the Very Energetic Radiation Imaging Telescope Array System (VERITAS) responded to a Swift-Burst Alert Telescope (BAT) detection of a gamma-ray burst, with observations beginning 270 s after the onset of BAT emission, and only 135 s after the main BAT emission peak. No statistically significant signal is detected above 140 GeV. [...]
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ddc:520
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2018-03-12
14:15
[PUBDB-2018-01461] Journal Article
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Indirect dark matter searches in the dwarf satellite galaxy Ursa Major II with the MAGIC telescopes
The dwarf spheroidal galaxy Ursa Major II (UMaII) is believed to be one of the most dark-matter dominated systems among the Milky Way satellites and represents a suitable target for indirect dark matter (DM) searches. The MAGIC telescopes carried out a deep observation campaign on UMaII between 2014 and 2016, collecting almost one hundred hours of good-quality data. [...]
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ddc:530
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2018-02-12
16:14
Embargoed OpenAccess [PUBDB-2018-01165] Journal Article
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Extragalactic diffuse γ-rays from dark matter annihilation: revised prediction and full modelling uncertainties
Recent high-energy data from $Fermi$-LAT on the diffuse $\gamma$-ray background have been used to set among the best constraints on annihilating TeV cold dark matter candidates. In order to assess the robustness of these limits, we revisit and update the calculation of the isotropic extragalactic $\gamma$-ray intensity from dark matter annihilation. [...]
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ddc:530
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2018-01-29
10:09
OpenAccess [PUBDB-2018-00864] Report/Journal Article
; ; ; et al
Search for very high-energy gamma-ray emission from the microquasar Cygnus X-1 with the MAGIC telescopes
[arXiv:1708.03689]
The microquasar Cygnus X-1 displays the two typical soft and hard X-ray states of a black-hole transient. During the latter, Cygnus X-1 shows a one-sided relativistic radio-jet. [...]
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2018-01-12
09:52
OpenAccess [PUBDB-2018-00585] Report/Journal Article
; ; ; et al
A polarized fast radio burst at low Galactic latitude
[arXiv:1705.02911]
We report on the discovery of a new fast radio burst (FRB), FRB 150215, with the Parkes radio telescope on 2015 February 15. The burst was detected in real time with a dispersion measure (DM) of 1105.6 ± 0.8 pc cm$^{−3}$, a pulse duration of 2.8 $^{+1.2}_{-0.5}$ ms, and a measured peak flux density assuming that the burst was at beam centre of 0.7$^{+0.2}_{-0.1}$ Jy. [...]
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2018-01-11
14:24
[PUBDB-2018-00515] Journal Article
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The Tunka-Grande experiment
The investigation of energy spectrum and mass composition of primary cosmic rays in the energy range 10$^{16}$–10$^{18}$ eV and the search for diffuse cosmic gamma rays are of the great interest for understanding mechanisms and nature of high-energy particle sources, the problem of great importance in modern astrophysics. Tunka-Grande scintillator array is a part of the experimental complex TAIGA (Tunka Advanced Instrument for Cosmic Ray and Gamma Astronomy) which is located in the Tunka Valley, about 50 km from Lake Baikal. [...]
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ddc:610
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