S. Commichau

Characterization of the PILATUS photon-counting pixel detector for X-ray energies from 1.75 keV to 60 keV

Tilman Donath, Susanne Brandstetter, Levent Cibik, S. Commichau et autres

The PILATUS detector module was characterized in the PTB laboratory at BESSY II comparing modules with 320 μm thick and newly developed 450 μm and 1000 μm thick silicon sensors. Measurements were carried out over a wide energy range, in-vacuum from 1.75 …

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GAMMA-RAY EXCESS FROM A STACKED SAMPLE OF HIGH- AND INTERMEDIATE-FREQUENCY PEAKED BLAZARS OBSERVED WITH THE MAGIC TELESCOPE

J. Aleksić, Lucio Angelo Antonelli, P. Antoranz, Michael Backes et autres

Between 2004 and 2009, a sample of 28 X-ray selected high- and intermediate-frequency peaked blazars with an X-ray flux larger than 2 μJy at 1 keV in the redshift range from 0.018 to 0.361 was observed with the MAGIC telescope at energies …

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Solid light concentrators for small-sized photosensors used in Cherenkov telescopes

Ben Huber, Ina Braun, Hans Anderhub, Michael Backes et autres

FACT—The first Cherenkov telescope using a G-APD camera for TeV gamma-ray astronomy

Hans Anderhub, Michael Backes, A. Biland, A. Boller et autres

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FACT -- the First Cherenkov Telescope using a G-APD Camera for TeV Gamma-ray Astronomy (HEAD 2010)

Hans Anderhub, Michael Backes, A. Biland, A. Boller et autres

Geiger-mode Avalanche Photodiodes (G-APD) bear the potential to significantly improve the sensitivity of Imaging Air Cherenkov Telescopes (IACT). We are currently building the First G-APD Cherenkov Telescope (FACT) by refurbishing an old IACT with a mirror area of 9.5 square meters and …

Results of the prototype camera for FACT

Hans Anderhub, Michael Backes, A. Biland, A. Boller et autres

ch, de (code pays fourni par la source)

Search for an extended VHEγ-ray emission from Mrk 421 and Mrk 501 with the MAGIC Telescope

J. Aleksić, Lucio Angelo Antonelli, P. Antoranz, Michael Backes et autres

Context. Part of the very high energy γ-ray radiation coming from extragalactic sources is absorbed through the pair production process on the extragalactic background light photons. Extragalactic magnetic fields alter the trajectories of these cascade pairs and, in turn, convert cosmic background …

es, it, de, pl, fi, ch, hr, us, bg (code pays fourni par la source)

A G-APD based Camera for Imaging Atmospheric Cherenkov Telescopes

Hans Anderhub, Michael Backes, A. Biland, A. Boller et autres

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MAGIC TeV gamma-ray observations of Markarian 421 during multiwavelength campaigns in 2006

J. Aleksić, Hans Anderhub, Lucio Angelo Antonelli, P. Antoranz et autres

Context. Wide-range spectral coverage of blazar-type active galactic nuclei is of paramount importance for understanding the particle acceleration mechanisms assumed to take place in their jets. The Major Atmospheric Gamma Imaging Cerenkov (MAGIC) telescope participated in three multiwavelength (MWL) campaigns, observing the …

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MAGIC observation of the GRB080430 afterglow

C. Baixeras, S. Balestra, J. A. Barrio, D. Bastieri et autres

Context: Gamma-ray bursts are cosmological sources emitting radiation from the gamma-rays to the radio band. Substantial observational efforts have been devoted to the study of gamma-ray bursts during the prompt phase, i.e. the initial burst of high-energy radiation, and during the long-lasting …

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Simultaneous multi-frequency observation of the unknown redshift blazar PG 1553+113 in March-April 2008

J. Aleksić, Hans Anderhub, Lucio Angelo Antonelli, P. Antoranz et autres

The blazar PG 1553+113 is a well known TeV γ-ray emitter. In this paper we determine its spectral energy distribution through simultaneous multi-frequency data to study its emission processes. An extensive campaign was carried out between March and April 2008, where optical, …

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SEARCH FOR VERY HIGH ENERGY GAMMA-RAY EMISSION FROM PULSAR-PULSAR WIND NEBULA SYSTEMS WITH THE MAGIC TELESCOPE

Hans Anderhub, Lucio Angelo Antonelli, P. Antoranz, Michael Backes et autres

The MAGIC collaboration has searched for high-energy gamma-ray emission of some of the most promising pulsar candidates above an energy threshold of 50 GeV, an energy not reachable up to now by other ground-based instruments. Neither pulsed nor steady gamma-ray emission has …

ch, it, es, de, pl, hr, us, fi, bg (code pays fourni par la source)