1,800,861 research outputs found
The Magic lantern.
No full textMode of access: Internet.Reprint. Orginally published weekly: Philadelphia : Benerman & Wilson. Vol. 1, no. 1 (Sept. 1874)-v. 1, no. 8 (Apr. 1875) issued as Vol. 7, no. 2 (1985?) of the Magic lantern bulletin
The MAGIC telescope
No full textMAGIC (Major Atmospheric Gamma Imaging Cherenkov telescope) is presently the largest
ground-based gamma ray telescope. MAGIC has been taking data regularly since October 2004
at the Roque de los Muchachos Observatory on the island of La Palma. In this paper the MAGIC
telescope status, its performances and some preliminary results on observed gamma ray sources
are presented
Accompanying slides for the MAGIC publication "Gamma-ray flaring activity of NGC 1275 in 2016-2017 measured by MAGIC"
No full textThis work is focused on the radio galaxy NGC 1275, the central galaxy of the Perseus cluster. The source was part of a MAGIC monitoring program and showed a very strong flare the night between 31st of December 2016 and the 1st of January 2017. The analysis of simultaneous data taken with MAGIC, Fermi-LAT and KVA telescopes made possible a deep study of the outburst. The very striking result of this paper is the very fast variability observed in gamma-rays: the observed gamma-ray flare therefore challenges all the discussed models for fast variability of VHE gamma-ray emission in active galactic nuclei. Very interesting, isnt'it? The accepted paper is available at the link below:
https://arxiv.org/abs/1806.01559
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Results of MAGIC galactic sources
No full textMAGIC is a single‐dish Cherenkov telescope located on La Palma (Spain), hence with an optimal view on the Northern sky. Sensitive in the 30 GeV—30 TeV energy band, it is nowadays the only ground‐based instrument being able to measure high‐energy γ‐rays below 100 GeV. We review the most recent experimental results on Galactic sources obtained using MAGIC. These include pulsars, binary systems, supernova remnants and unidentified sources
The Development of Socialist Magic: Reflections on the Place of Power and Ideology in Magic Performance
No full textThe author seeks to establish a historical context for his own performance practice, which combines radical left politics with magic tricks and ventriloquism. A survey of the iconography of magic performance from the time of Jean Eugene Robert-Houdin onwards reveals an ideological underpinning which reflects hierarchies of class, gender and race in society.
However, the magician’s role is complex, as he (or less commonly she) practises an art which is part of ‘low’ culture, despite its association with the rich and powerful. Moreover, the modern magician is associated with rationalism and scepticism, which sometimes puts the conjurer on the side of a progressive view of society. The author examines his own attempts to overcome this disjunction in his practice and explains why, for him, the combination of agitprop and magic performance can only be effective through the use of humour
Gamma-Ray Astronomy with MAGIC above 25 GeV
No full textThe MAGIC telescopes are 17m diameter
Cherenkov telescopes, located on the Canarian island
La Palma (Spain), with an optimal view on the
Northern sky. It is nowadays the only ground-based
instrument able to measure high-energy °-rays below
100 GeV. A recent upgrade of the trigger system
allows to extend the sensitivity down to 25 GeV, which
resulted in the detection of pulsed emission from the
Crab pulsar. The construction of the second telescope
MAGIC-II has been completed and commissioning is
in its final phase phase. We review some recent experimental
results obtained with the single telescope
MAGIC-I
The MAGIC Experiment
No full textThe Magic Cherenkov Telescope is located at the Observatory of the Roque de los
Muchachos (ORM) and since 2004 is operative, in may 2005 was started the first yearly
campaign of data taking named Cycle I. During this period the telescope reported signals
from galactic and extragalactic AGN sources. In this report we will describe the
technique for the detection of Very High Energy (VHE) gammas by this class o
Highlights of MAGIC results
No full textMAGIC is the largest Cherenkov telescope currently operating and is in full operation since September 2004. Since then, it is providing a full wealth of exciting new physics results from its observations in the very high energy (VHE) region of galactic and extragalactic locations. Among the main results obtained, the discoveries of new sources and even of entire new classes of sources, as well as the observation of fast variability down to an unprecedented level of precision. Recent results for distant extragalactic sources are also shown: observations that are important for the development of new models of extragalactic background and to evaluate the systematic uncertainties of the imaging Cherenkov technique
Constraining Dark Matter lifetime with a deep gamma-ray survey of the Perseus Galaxy Cluster with MAGIC
No full textThis work is dedicated to the search of dark matter in the Perseus Galaxy Cluster with MAGIC:
Clusters of galaxies are the largest known gravitationally bound structures in the Universe, and most of their masses comes in the form of dark matter. The study, conducted on almost 400 hours of data taken with a special technique in orderin order to take into account the cluster morphology (many bright sources were present in the field of view) concludes that dark matter particles have a decay lifetime longer than ∼10^26s in all considered channels. This result improves previous lower limits found by MAGIC and represent the strongest set of limits on decaying dark matter particles from ground-based gamma-ray instruments.
Find the full paper on ArXiv: https://arxiv.org/abs/1806.11063v3</p
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