In this work we present the status of the Single Mirror Small-Sized Telescope project: its design, previous observation campaigns, simulation results and future.
After more than 100 years since their discovery, cosmic rays (CRs) are still one of the most intriguing open questions in astrophysics. Intrinsic difficulties are unavoidable when trying to identify the sites of production and acceleration of these charged particles due to the magnetic deflections they undergo when travelling across galactic and extragalactic distances. However, in the era of...
We search for an indirect signal of dark matter through high-energy γ rays from the Wolf-Lundmark-Melotte (WLM) dwarf irregular galaxy. The pair annihilation of dark matter particles would produce Standard Model particles in the final state such as γ rays, which might be detected by ground-based Cherenkov telescopes. Dwarf irregular galaxies represent promising targets as they...
The Cherenkov Telescope Array (CTA) will allow observations in the >10 GeV range with unprecedented photon statistics and sensitivity to investigate the yet-unexplored physics of short-time-scale transient events. The CTA Transient program includes follow-up observations of a wide range of multi-wavelength and multi-messenger alerts, ranging from Galactic compact object binary systems to...
In 2019, the first firm detection of a very high energy (VHE, E>100 GeV) emission component from Gamma-ray Bursts (GRBs) has definitely opened a new observational window for the study of those enigmatic transient events.These discoveries did not arrive unexpectedly but they represent the result of a 20-years-long-lasting hunt by the major Cherenkov telescope collaborations. Furthermore, the...
The Cherenkov Telescope Array (CTA) will be the largest ground-based gamma-ray observatory. CTA will detect the signature of gamma rays and cosmic
rays hadrons and electrons interacting with the Earth’s atmosphere. Making the best possible use of this facility requires to be able to separate events
generated by gamma rays from the particle-induced background. Deep neural networks produced...
Large Size Telescope (LST) is the biggest from three main telescope types of CTA. Both CTA sites shall be equipped with four LSTs, located in the middle of each array. Having the largest reflector of 23 m diameter, the LSTs will lower the energy threshold of the whole observatory down to about 20 GeV and will be crucial for the CTA sensitivity from that energy up to about 200 GeV. As the first...
In-depth analysis and comparison of simulated and observed trigger rates provides a good verification on the correctness of the telescope simulation. Presented method uses the full simulation of cosmic rays induced showers with the large size telescope prototype (LST-1) which is installed at the Roque de los Muchachos Observatory, La Palma, Spain. It compliments the results obtained with the...
The first prototype of the Large Size Telescopes (LST) proposed for the forthcoming Cherenkov Telescope Array (CTA) has recently started to operate in La Palma and is finalizing its commissioning period. The large structure of LST-1 (24 m diameter mirror) imposes a strict control of the telescope bending and deformations that could affect the pointing accuracy and its overall performances....
Imaging Atmospheric Cherenkov Telescopes (IACTs) collect the Cherenkov light emitted in Extensive Air Showers (EASs) from highly energetic particles in the atmosphere. One of the main challenges of IACT based astronomy is to discriminate between images from very high energy photons and other particles, mainly protons, and to identify the energy and direction of the primary photons. Here, an...
We are using the longest and densest unbiased observing campaign obtained at TeV and GeV energies during 5.5 years with the FACT telescope and the Fermi LAT detector together with contemporaneous multi-wavelength observations to characterize the variability of the source and constrain the underlying physical mechanisms. We study and correlate light curves obtained by ten different instruments...
In this work we present the design and realization of a mini-telescope based on the optical module of the SST-1M project. The result of the observation campaign in the St Luc Observatory will also be presented.
The Cherenkov Telescope Array (CTA) will operate several types of telescopes and cameras. The individual camera trigger rates will vary much – from 0.6 to 15kHz – while the content of the raw data will be heterogeneous. Raw data streams of up to 24Gbps per telescope must be handled efficiently, from the camera front-ends down to the on-site repository and real-time analysis.
The $\eta$ Carinae binary system is the first $\gamma$-ray binary ever observed which does not contain a compact object. It can be considered as a natural laboratory to study particle acceleration and $\gamma$-ray emission. Indeed the dense wind of the primary star shocks against the fast light wind coming from the companion star, creating the conditions to accelerate particles up to...
There exist many distributed storage
systems that are mature and reliable, for
instance DIRAC, iRods and OneData.
These systems lack compliance with the
Open Archival Information Systems (OAIS)
standard and require data centres that run
them to accommodate for their specific
needs. We introduce GAMAS, a novel
distributed OAIS. GAMAS is a lightweight
python package that can be...
HESS J1632-478 is an extended and unidentified TeV source in the Galactic plane.
In order to identify the source of the very high energy emission and to constrain its spectral energy distribution, we used a deep observation of the field obtained with XMM-Newton together with data from Molonglo, Spitzer and Fermi to detect counterparts at other wavelengths. The flux density emitted by HESS...
The mechanisms responsible for the prompt emission of Gamma-Ray Bursts (GRBs) remain poorly understood despite a
wealth of measurements performed over the last 5 decades. After detailed measurements of the photon direction, time
and energy, recent years have seen the first measurements of the polarization of the prompt emission by two dedicated
polarimeters, POLAR and GAP. The typical low...
In September 2010 the Crab nebula astonished the scientific community displaying 3 $\gamma$-ray spikes above few hundreds MeV. Despite this variability had been already predicted in 1998, it has been the very first time that was observed.
We have been the first to publish a paper analysing the INTEGRAL (20-500\,keV) and FERMI (0.1-300\,GeV) data. They were collected almost simultaneously to...
