Analysis of data from the SST-1M cherenkov telescopes


The Earth's atmosphere is not transparent for cosmic gamma-ray photons of very high energies. These photons interact with atomic nuclei in the atmosphere and produce showers of secondary particles emitting the so-called Cherenkov radiation, which can be detected with ground-based Cherenkov telescopes. SST-1M was developed as a prototype of a Small-Sized Telescope for the Cherenkov Telescope Array, designed for observations of the gamma-ray induced atmospheric showers of energies above 3 TeV. Institute of Physics and Astronomical Institute of AS CR in collaboration with foreign institutes currently operates a pair of these telescopes at the Ondrejov Observatory. Stereoscopic observation of the atmospheric showers will allow for a reconstruction of the physical properties of the primary gamma-ray photons with much better precision than if the telescopes were operated independently. The thesis will investigate stereoscopic reconstruction, aiming at the determination of sensitivity, and angular and energy resolution of the telescope pair.

Large Field-Of-View of the SST-1M telescopes allows observing extended galactic gamma-ray sources, such as the relatively recently established class of the so-called TeV halo objects. In TeV halos, the high-energy gamma-ray emission is due to Inverse Compton scattering of relativistic electrons accelerated by a pulsar, freely escaping into the interstellar medium (ISM) after the pulsar leaves the Pulsar Wind Nebula. Observations of the TeV halos can be therefore used as a unique probe of the propagation of relativistic particles in the ISM. The thesis will aim to characterize the performance of the SST-1M telescopes for the detection and morphological studies of these objects.