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CERN Accelerating science

CERN Document Server 11 のレコードが見つかりました。  1 - 10次  レコードへジャンプ: 検索にかかった時間: 0.65 秒 
1.
Combined searches for dark matter in dwarf spheroidal galaxies observed with the MAGIC telescopes, including new data from Coma Berenices and Draco / MAGIC Collaboration
Milky Way dwarf spheroidal galaxies (dSphs) are among the best candidates to search for signals of dark matter annihilation with Imaging Atmospheric Cherenkov Telescopes, given their high mass-to-light ratios and the fact that they are free of astrophysical gamma-ray emitting sources. Since 2011, MAGIC has performed a multi-year observation program in search for Weakly Interacting Massive Particles (WIMPs) in dSphs. [...]
arXiv:2111.15009.- 2022-03 - 17 p. - Published in : Phys. Dark Univ. 35 (2022) 100912 Fulltext: PDF;
2.
MAGIC observations of the nearby short gamma-ray burst GRB 160821B / MAGIC Collaboration
The coincident detection of GW170817 in gravitational waves and electromagnetic radiation spanning the radio to MeV gamma-ray bands provided the first direct evidence that short gamma-ray bursts (GRBs) can originate from binary neutron star (BNS) mergers. On the other hand, the properties of short GRBs in high-energy gamma rays are still poorly constrained, with only $\sim$20 events detected in the GeV band, and none in the TeV band. [...]
arXiv:2012.07193.- 2021-02-16 - 11 p. - Published in : Astrophys. J. 908 (2021) 90 Fulltext: PDF;
3.
Study of the GeV to TeV morphology of the $\gamma$-Cygni SNR (G78.2+2.1) with MAGIC and Fermi-LAT / MAGIC Collaboration
Context. [...]
arXiv:2010.15854.
- 20 p.
Fulltext
4.
An intermittent extreme BL Lac: MWL study of 1ES 2344+514 in an enhanced state / MAGIC Collaboration
Extreme High-frequency BL~Lacs (EHBL) feature their synchrotron peak of the broadband spectral energy distribution (SED) at $\nu_{\rm s} \geq $10$^{17}$\,Hz. The BL~Lac object 1ES~2344+514 was included in the EHBL family because of its impressive shift of the synchrotron peak in 1996 [...]
arXiv:2006.06796.- 2020-08-11 - 17 p. - Published in : Mon. Not. R. Astron. Soc. 496 (2020) 3912 Fulltext: PDF;
5.
A search for dark matter in Triangulum II with the MAGIC telescopes / MAGIC Collaboration
We present the first results from very-high-energy observations of the dwarf spheroidal satellite candidate Triangulum II with the MAGIC telescopes from 62.4 hours of good-quality data taken between August 2016 and August 2017. We find no gamma-ray excess in the direction of Triangulum II, and upper limits on both the differential and integral gamma-ray flux are presented. [...]
arXiv:2003.05260.- 2020-05 - 14 p. - Published in : Phys. Dark Univ.: 28 (2020) , pp. 100529
Fulltext: PDF;
6.
Bounds on Lorentz invariance violation from MAGIC observation of GRB 190114C / MAGIC Collaboration
On January 14, 2019, the Major Atmospheric Gamma Imaging Cherenkov telescopes detected GRB 190114C above 0.2 TeV, recording the most energetic photons ever observed from a gamma-ray burst. We use this unique observation to probe an energy dependence of the speed of light in vacuo for photons as predicted by several quantum gravity models. [...]
arXiv:2001.09728.- 2020-07-09 - 7 p. - Published in : Phys. Rev. Lett. 125 (2020) 021301 Fulltext: PDF;
7.
Unravelling the complex behavior of Mrk 421 with simultaneous X-ray and VHE observations during an extreme flaring activity in April 2013 / MAGIC Collaboration
We report on a multi-band variability and correlation study of the TeV blazar Mrk 421 during an exceptional flaring activity observed from 2013 April 11 to 2013 April 19. [...]
arXiv:2001.08678.
- 46 p.
Fulltext
8.
Monitoring of the radio galaxy M87 during a low emission state from 2012 to 2015 with MAGIC / MAGIC Collaboration
M87 is one of the closest (z=0.00436) extragalactic sources emitting at very-high-energies (VHE, E > 100 GeV). The aim of this work is to locate the region of the VHE gamma-ray emission and to describe the observed broadband spectral energy distribution (SED) during the low VHE gamma-ray state. [...]
arXiv:2001.01643.- 2020-03-11 - 12 p. - Published in : Mon. Not. R. Astron. Soc. 492 (2020) 5354-5365 Fulltext: PDF;
9.
New hard-TeV extreme blazars detected with the MAGIC telescopes / MAGIC Collaboration
Extreme high-frequency peaked BL Lac objects (EHBLs) are blazars which exhibit extremely energetic synchrotron emission. They also feature non-thermal gamma-ray emission whose peak lies in the very high-energy (VHE, E > 100 GeV) range, and in some sources exceeds 1TeV: this is the case of hard-TeV EHBLs such as 1ES 0229+200. [...]
arXiv:1911.06680.- 2020-02-20 - 24 p. - Published in : Astrophys. J. Suppl. Ser. 247 (2020) 16 Fulltext: PDF;
10.
Testing emission models on the extreme blazar 2WHSP J073326.7+515354 detected at very high energies with the MAGIC telescopes / MAGIC Collaboration
Extreme high-energy peaked BL Lac objects (EHBLs) are an emerging class of blazars. Their typical two-hump structured spectral energy distribution (SED) peaks at higher energies with respect to conventional blazars. [...]
arXiv:1909.11621.- 2019 - 16 p. - Published in : Mon. Not. R. Astron. Soc. 490 (2019) 2284-2299
Fulltext: PDF;

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