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Mountaintop Gamma Ray Observations of Three Terrestrial Gamma‐Ray Flashes at the Säntis Tower, Switzerland With Coincident Radio Waveforms

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Publications associées (31)

Multiwavelength observations of a VHE gamma-ray flare from PKS 1510-089 in 2015

Thomas Günther Bretz

Context. PKS 1510 089 is one of only a few flat spectrum radio quasars detected in the very-high-energy (VHE, > 100 GeV) gamma-ray band. Aims. We study the broadband spectral and temporal properties of the PKS 1510 089 emission during a high gamma-ray stat ...

Edp Sciences S A2017

Observations of Sagittarius A* during the pericenter passage of the G2 object with MAGIC

Thomas Günther Bretz

Context. We present the results of a multi-year monitoring campaign of the Galactic center (GC) with the MAGIC telescopes. These observations were primarily motivated by reports that a putative gas cloud (G2) would be passing in close proximity to the supe ...

Edp Sciences S A2017

MAGIC detection of very high energy gamma-ray emission from the low-luminosity blazar 1ES 1741+196

Thomas Günther Bretz

We present the first detection of the nearby (z = 0.084) low-luminosity BL Lac object 1ES 1741+196 in the very high energy (E > 100 GeV) band. This object lies in a triplet of interacting galaxies. Early predictions had suggested 1ES 1741+196 to be, along ...

Oxford Univ Press2017

First multi-wavelength campaign on the gamma-ray-loud active galaxy IC 310

Udo Bach, Thomas Günther Bretz

Context. The extragalactic very-high-energy gamma-ray sky is rich in blazars. These are jetted active galactic nuclei that are viewed at a small angle to the line-of-sight. Only a handful of objects viewed at a larger angle are so far known to emit above 1 ...

Edp Sciences S A2017

Constraining the production of cosmic rays by pulsars

Mikhail Ivanov

One of the possible sources of hadronic cosmic rays (CRs) are newborn pulsars. If this is indeed the case, they should feature diffusive gamma-ray halos produced by interactions of CRs with interstellar gas. In this paper we try to identify extended gamma- ...

American Physical Society2016

FIRST NuSTAR OBSERVATIONS OF MRK 501 WITHIN A RADIO TO TeV MULTI-INSTRUMENT CAMPAIGN

Thomas Günther Bretz, Xin Chen

We report on simultaneous broadband observations of the TeV-emitting blazar Markarian 501 between 2013 April 1 and August 10, including the first detailed characterization of the synchrotron peak with Swift and NuSTAR. During the campaign, the nearby BL La ...

Iop Publishing Ltd2015

A 5x5 SPADnet Digital SiPM Tile for PET Applications

Claudio Bruschini, Edoardo Charbon, Gabor Nemeth

SPADnet is a sensor platform for the detection and processing of gamma photons generated in a PET system. SPADnet uses the novel technique of deferred coincidence detection, whereas timestamps associated with gamma events and their energy are routed at hig ...

2015

Measurement of the exclusive gamma production cross-section in pp collisions at root s=7 TeV and 8 TeV

Christoph Frei, Peter Clarke, Alessandro Mapelli, Aurelio Bay, Minh Tâm Tran, Marc-Olivier Bettler, Cédric Potterat, Tatsuya Nakada, Guido Haefeli, Niko Neufeld, Olivier Schneider, Hans Dijkstra, Julien Rouvinet, Frédéric Guillaume Dupertuis, Frédéric Teubert, Gerhard Raven, Bastien Luca Muster, Chitsanu Khurewathanakul, Frédéric Blanc, Matthew Needham, Liang Sun, Thibaud Humair, Barinjaka Rakotomiaramanana, Xiaoxue Han, Greig Alan Cowan, Paolo Durante, Jessica Prisciandaro, Ilya Komarov, Zhirui Xu, Mark Tobin, Victor Coco, Mirco Dorigo, Sebastiana Gianì, Maurizio Martinelli, Jian Wang, Liupan An, Yi Zhang, Lei Zhang, Luca Pescatore, Adam Davis, Pietro Marino, , , , , , , ,

Multiwavelength observations of Mrk 501 in 2008

Thomas Günther Bretz, Xin Chen

Context. Blazars are variable sources on various timescales over a broad energy range spanning from radio to very high energy (>100 GeV, hereafter VHE). Mrk 501 is one of the brightest blazars at TeV energies and has been extensively studied since its firs ...

Edp Sciences S A2015

Measurement of the Direct CP Asymmetry in over-bar & RARR; gamma; Decays with a Lepton Tag

Olivier Schneider, Sun Hee Kim, Tagir Aushev, Mingkui Wang, Chao Wang, Dipanwita Dutta, Jun Yong Kim, Tara Nanut, Donghyun Kim, Ji Hyun Kim, Yiming Li

We report the measurement of the direct CP asymmetry in the radiative (B) over bar -> Xs+d gamma decay using a data sample of (772 +/- 11) x 10(6) B (B) over bar pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-en ...

Amer Physical Soc2015

Search for B-s(0) -> gamma gamma and a measurement of the branching fraction for B-s(0) -> phi gamma

Olivier Schneider, Sun Hee Kim, Tagir Aushev, Chao Wang, Dipanwita Dutta, Jun Yong Kim, Tara Nanut, Donghyun Kim, Ji Hyun Kim, Yiming Li

We search for the decay B-s(0) -> gamma gamma and measure the branching fraction for B-s(0) -> phi gamma using 121.4 fb(-1) of data collected at the Upsilon(5S) resonance with the Belle detector at the KEKB asymmetric- energy e(+)e(-) collider. The B-s(0) ...

American Physical Society2015

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A study is presented of central exclusive production of gamma(n S) states, where the gamma (n S) resonances decay to the mu(+) mu(-) final state, using p p collision data recorded by the LHCb experiment. The cross-section is measured in the rapidity range ...

Springer Nature2015