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CERN Document Server Pronađeno je 2,047 zapisa  1 - 10slijedećikraj  idi na zapis: Pretraživanje je potrajalo 0.75 sekundi 
1.
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Probing quantum gravity using photons from a flare of the active galactic nucleus Markarian 501 observed by the MAGIC telescope / MAGIC Collaboration
We use the timing of photons observed by the MAGIC gamma-ray telescope during a flare of the active galaxy Markarian 501 to probe a vacuum refractive index ~ 1-(E/M_QGn)^n, n = 1,2, that might be induced by quantum gravity. The peaking of the flare is found to maximize for quantum-gravity mass scales M_QG1 ~ 0.4x10^18 GeV or M_QG2 ~ 0.6x10^11 GeV, and we establish lower limits M_QG1 > 0.26x10^18 GeV or M_QG2 > 0.39x10^11 GeV at the 95% C.L. [...]
arXiv:0708.2889; CERN-PH-TH-2007-137; MPP-2007-112; CERN-PH-TH-2007-137; MPP-2007-112.- Geneva : CERN, 2008 - 5 p. - Published in : Phys. Lett. B 668 (2008) 253-257 Fulltext: PDF; External link: Preprint
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2.
(91)
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;
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3.
(90)
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;
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(88)
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
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5.
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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;
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6.
(88)
Probing the very-high-energy gamma-ray spectral curvature in the blazar PG 1553+113 with the MAGIC telescopes / Collaboration for the MAGIC
PG 1553+113 is a very-high-energy (VHE, E>100 GeV) gamma-ray emitter classified as a BL Lac object. Its redshift is constrained by intergalactic absorption lines in the range 0.4<z<0.58. [...]
arXiv:1408.1975.- 2015-07-11 - 12 p. - Published in : Mon. Not. R. Astron. Soc. 450 (2015) 4399-4410 Fulltext: 1408.1975 - PDF; arXiv:1408.1975 - PDF; External link: Preprint
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7.
(87)
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;
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8.
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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
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9.
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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
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10.
(81)
Science with the Cherenkov Telescope Array / Cherenkov Telescope Array Consortium Collaboration
The Cherenkov Telescope Array, CTA, will be the major global observatory for very high energy gamma-ray astronomy over the next decade and beyond. [...]
arXiv:1709.07997. - 2017. - 211 p.
Preprint
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