Publications (33)
Large scale characterization and calibration strategy of a SiPM-based camera for gamma-ray astronomy
C. Alispach, J. Borkowski, F. R. Cadoux +18
The SST-1M is a 4-m diameter mirror Davies-Cotton gamma-ray telescope. It has been designed to cover the energy range above 500 GeV and to be part of an array of telescopes separat…
Study of the variable broadband emission of Markarian 501 during the most extreme Swift X-ray activity
MAGIC Collaboration, V. A. Acciari, S. Ansoldi +185
Mrk501 is a very high-energy (VHE) gamma-ray blazar located at z=0.034. During a period of two weeks in July 2014, the highest X-ray activity of Mrk501 was observed in ~14 years of…
Investigation of the correlation patterns and the Compton dominance variability of Mrk 421 in 2017
MAGIC Collaboration, V. A. Acciari, S. Ansoldi +284
We present a detailed characterisation and theoretical interpretation of the broadband emission of the paradigmatic TeV blazar Mrk 421, with special focus on the multi-band flux co…
Multiwavelength variability and correlation studies of Mrk 421 during historically low X-ray and -ray activity in 20152016
MAGIC Collaboration, V. A. Acciari, S. Ansoldi +224
We report a characterization of the multi-band flux variability and correlations of the nearby (z=0.031) blazar Markarian 421 (Mrk 421) using data from Metsähovi, Swift, Fermi-LAT…
FACT - The First G-APD Cherenkov Telescope: Status and Results
T. Bretz, H. Anderhub, M. Backes +51
The First G-APD Cherenkov telescope (FACT) is the first telescope using silicon photon detectors (G-APD aka. SiPM). It is built on the mount of the HEGRA CT3 telescope, still locat…
Analysis of commissioning data from SST-1M : A Prototype of Single-Mirror Small Size Telescope
Thomas Tavernier, Jakub Jurysek, Vladimir Novotný +52
SST-1M is a prototype of a single-mirror Small Size Telescope developed by a consortium of institutes from Poland, Switzerland and the Czech Republic. With a wide field of view of…
FACT - Long-term stability and observations during strong Moon light
M. L. Knoetig, A. Biland, T. Bretz +22
The First G-APD Cherenkov Telescope (FACT) is the first Cherenkov telescope equipped with a camera made of silicon photon detectors (G-APD aka. SiPM). Since October 2011, it is reg…
Normalized and Asynchronous Mirror Alignment for Cherenkov Telescopes
M. L. Ahnen, D. Baack, M. Balbo +29
Imaging Atmospheric Cherenkov Telescopes (IACTs) need imaging optics with large apertures and high image intensities to map the faint Cherenkov light emitted from cosmic ray air sh…
Mono and stereo performance of the two SST-1M telescope prototypes
J. Jurysek, T. Tavernier, V. Novotný +51
The Single-Mirror Small-Sized Telescope, or SST-1M, was originally developed as a prototype of a small-sized telescope for CTA, designed to form an array for observations of gamma-…
FACT - How stable are the silicon photon detectors?
T. Bretz, A. Biland, J. Buà +22
The First G-APD Cherenkov telescope (FACT) is the first telescope using silicon photon detectors (G-APD aka. SiPM). The use of Silicon devices promise a higher photon detection eff…
Design and Operation of FACT -- The First G-APD Cherenkov Telescope
H. Anderhub, M. Backes, A. Biland +51
The First G-APD Cherenkov Telescope (FACT) is designed to detect cosmic gamma-rays with energies from several hundred GeV up to about 10 TeV using the Imaging Atmospheric Cherenkov…
Observation of the Crab Nebula with the Single-Mirror Small-Size Telescope stereoscopic system at low altitude
C. Alispach, A. Araudo, M. Balbo +63
The Single-Mirror Small-Size Telescope (SST-1M) stereoscopic system is composed of two Imaging Atmospheric Cherenkov Telescopes (IACTs) designed for optimal performance for gamma-r…
Multi-wavelength study of Mrk 421 during a TeV flare
A. Gokus, A. Kreikenbohm, K. Leiter +31
The blazar Mrk 421 shows frequent, short flares in the TeV energy regime. Due to the fast nature of such episodes, we often fail to obtain sufficient simultaneous information about…
An intermittent extreme BL Lac: MWL study of 1ES 2344+514 in an enhanced state
MAGIC Collaboration, V. A. Acciari, S. Ansoldi +215
Extreme High-frequency BL~Lacs (EHBL) feature their synchrotron peak of the broadband spectral energy distribution (SED) at 10\,Hz. The BL~Lac object 1ES~2…
The extreme HBL behaviour of Markarian 501 during 2012
M. L. Ahnen, S. Ansoldi, L. A. Antonelli +276
A multiwavelength campaign was organized to take place between March and July of 2012. Excellent temporal coverage was obtained with more than 25 instruments, including the MAGIC,…
Mirror Position Determination for the Alignment of Cherenkov Telescopes
J. Adam, M. L. Ahnen, D. Baack +27
Imaging Atmospheric Cherenkov Telescopes (IACTs) need imaging optics with large apertures to map the faint Cherenkov light emitted in extensive air showers onto their image sensors…
FACT -- the First Cherenkov Telescope using a G-APD Camera for TeV Gamma-ray Astronomy (HEAD 2010)
H. Anderhub, M. Backes, A. Biland +33
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 Firs…
A novel camera type for very high energy gamma-ray astronomy based on Geiger-mode avalanche photodiodes
H. Anderhub, M. Backes, A. Biland +28
Geiger-mode avalanche photodiodes (G-APD) are promising new sensors for light detection in atmospheric Cherenkov telescopes. In this paper, the design and commissioning of a 36-pix…
CTA contributions to the 33rd International Cosmic Ray Conference (ICRC2013)
The CTA Consortium, :, O. Abril +1102
Compilation of CTA contributions to the proceedings of the 33rd International Cosmic Ray Conference (ICRC2013), which took place in 2-9 July, 2013, in Rio de Janeiro, Brazil
FACT - Monitoring Blazars at Very High Energies
D. Dorner, M. L. Ahnen, M. Bergmann +26
The First G-APD Cherenkov Telescope (FACT) was built on the Canary Island of La Palma in October 2011 as a proof of principle for silicon based photosensors in Cherenkov Astronomy.…
Bokeh Mirror Alignment for Cherenkov Telescopes
M. L. Ahnen, D. Baack, M. Balbo +29
Imaging Atmospheric Cherenkov Telescopes (IACTs) need imaging optics with large apertures and high image intensities to map the faint Cherenkov light emitted from cosmic ray air sh…
Cherenkov Telescope Array Contributions to the 35th International Cosmic Ray Conference (ICRC2017)
F. Acero, B. S. Acharya, V. AcÃn Portella +1137
List of contributions from the Cherenkov Telescope Array Consortium presented at the 35th International Cosmic Ray Conference, July 12-20 2017, Busan, Korea.
The SST-1M imaging atmospheric Cherenkov telescope for gamma-ray astrophysics
C. Alispach, A. Araudo, M. Balbo +63
The SST-1M is a Small-Sized Telescope (SST) designed to provide a cost-effective and high-performance solution for gamma-ray astrophysics, particularly for energies beyond a few Te…
FACT: Towards Robotic Operation of an Imaging Air Cherenkov Telescope
A. Biland, H. Anderhub, M. Backes +51
The First G-APD Cherenkov Telescope (FACT) became operational at La Palma in October 2011. Since summer 2012, due to very smooth and stable operation, it is the first telescope of…
Data compression for the First G-APD Cherenkov Telescope
M. L. Ahnen, M. Balbo, M. Bergmann +27
The First Geiger-mode Avalanche photodiode (G-APD) Cherenkov Telescope (FACT) has been operating on the Canary island of La Palma since October 2011. Operations were automated so t…
The SST-1M stereoscopic system
C. Alispach, A. Araudo, M. Balbo +63
The Single-Mirror Small-Size Telescope (SST-1M) is an Imaging Atmospheric Cherenkov Telescope designed for detecting very high-energy gamma rays. With a compact design achieved thr…
FACT - Long-term Monitoring of Bright TeV-Blazars
D. Dorner, A. Biland, T. Bretz +21
Since October 2011, the First G-APD Cherenkov Telescope (FACT) is operated successfully on the Canary Island of La Palma. Apart from the proof of principle for the use of G-APDs in…
FACT - Threshold prediction for higher duty cycle and improved scheduling
T. Bretz, A. Biland, J. Buà +22
The First G-APD Cherenkov telescope (FACT) is the first telescope using silicon photon detectors (G-APD aka. SiPM). The use of Silicon devices promise a higher photon detection eff…
FACT -- Operation of the First G-APD Cherenkov Telescope
T. Bretz, A. Biland, J. Buà +33
Since more than two years, the First G-APD Cherenkov Telescope (FACT) is operating successfully at the Canary Island of La Palma. Apart from its purpose to serve as a monitoring fa…
FACT -- The G-APD revolution in Cherenkov astronomy
T. Bretz, H. Anderhub, M. Backes +53
Since two years, the FACT telescope is operating on the Canary Island of La Palma. Apart from its purpose to serve as a monitoring facility for the brightest TeV blazars, it was bu…
Prospects for the detection of gamma rays using Cherenkov telescopes enhanced by a ground array observatory
C. Alispach, A. Araudo, A. Bakalová +67
We study through detailed simulated data and their optimized analysis the expected performance of the Single-Mirror Small-Size imaging atmospheric Cherenkov Telescopes (SST-1M) pot…
The Array Control and Data Acquisition software of the Cherenkov Telescope Array Observatory
I. Oya, B. López, P. Aubert +61
The Cherenkov Telescope Array Observatory (CTAO) aims to advance knowledge of the gamma-ray sky as the largest gamma-ray observatory ever built. The CTAO will be deployed at two si…
Calibration and performance of the photon sensor response of FACT -- The First G-APD Cherenkov telescope
A. Biland, T. Bretz, J. Buà +33
The First G-APD Cherenkov Telescope (FACT) is the first in-operation test of the performance of silicon photo detectors in Cherenkov Astronomy. For more than two years it is operat…