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E. Leonardo

Researcher at University of Siena

Publications -  83
Citations -  7352

E. Leonardo is an academic researcher from University of Siena. The author has contributed to research in topics: MAGIC (telescope) & Crab Nebula. The author has an hindex of 49, co-authored 83 publications receiving 6992 citations.

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Very-High-Energy Gamma Rays from a Distant Quasar: How Transparent Is the Universe?

J. Albert, +148 more
- 27 Jun 2008 - 
TL;DR: The atmospheric Cherenkov gamma-ray telescope MAGIC, designed for a low-energy threshold, has detected very-high-energy gamma rays from a giant flare of the distant Quasi-Stellar Radio Source 3C 279, at a distance of more than 5 billion light-years.
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Magic discovery of very high energy emission from the fsrq pks 1222+21

Jelena Aleksić, +159 more
TL;DR: Very high energy (VHE) gamma-ray emission from the flat spectrum radio quasar (FSRQ) PKS 1222+21 (4C 21.432) was detected with the MAGIC Cherenkov telescopes during a short observation (similar to 0.5 hr) performed on 2010 June 17 as mentioned in this paper.
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Fermi Large Area Telescope Observations of Markarian 421: The Missing Piece of its Spectral Energy Distribution

A. A. Abdo, +421 more
TL;DR: In this paper, the gamma-ray activity of the high-synchrotron-peaked BL Lacertae object Markarian 421 (Mrk 421) during the first 1.5 years of Fermi operation was reported.
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MAGIC discovery of VHE Emission from the FSRQ PKS 1222+21

Jelena Aleksić, +148 more
TL;DR: Very high energy (VHE) gamma-ray emission from the flat spectrum radio quasar (FSRQ) PKS 1222+21 (4C 21.432) was detected with the MAGIC Cherenkov telescopes during a short observation (~0.5 hr) performed on 2010 June 17.
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Radio Imaging of the Very-High-Energy gamma-Ray Emission Region in the Central Engine of a Radio Galaxy

V. A. Acciari, +385 more
- 24 Jul 2009 - 
TL;DR: Radio and VHE observations of the radio galaxy Messier 87 are revealed, revealing a period of extremely strong VHE gamma-ray flares accompanied by a strong increase of theRadio flux from its nucleus, implying that charged particles are accelerated to very high energies in the immediate vicinity of the black hole.