Year: 2025
Type: preprint
Abstract: CTA~1 is a composite supernova remnant featuring a shell structure and an inner Pulsar Wind Nebula. The shell is visible in the radio band, while Fermi has detected the radio-quiet pulsar PSR J0007+7303 at its core. Gamma-ray detectors such as LHAASO and VERITAS have detected TeV emission in the vicinity of the pulsar. However, the derived SEDs from LHAASO WCDA and VERITAS show significant discrepancies, which could be due to a complicated energy-dependent morphology not accounted for in the spectral analysis, and different angular resolution of the two experiments. CTA~1 has been a target for dedicated observations by the SST-1M telescopes, a pair of small-sized Imaging Atmospheric Cherenkov Telescopes (IACTs) capable of operating in both mono and stereo modes. Located at the Ondřejov Observatory in Czech Republic, these telescopes are sensitive to the high energy range of the gamma-ray spectrum, spanning from 1 to 300 TeV. To investigate the very high-energy emission of CTA~1, the SST-1Ms have accumulated approximately 30 hours of selected observations, aiming to further constrain the characteristics of the source's high energy emission, and to shed some light into the discrepancy between different experiments.
Source: arXiv (Cornell University)
Author: Lacave, Bastien
Institution: University of Geneva
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Awards: Design Studies of CTA cameras for gamma-ray detection and High-Energy Multi-Messenger Data Center, Cherenkov Telescope Array - participation of the Czech Republic, G2678520069, Swiss contribution to the construction of innovative cameras for middle and small size telescopes of the Cherenkov Telescope Array, Extension of Scientific Potential of Gamma-ray Observatory SWGO by Cherenkov Telescopes, G545007060, G679317963, G7253040719, The operation of the first CTA prototypes of telescopes and their cameras, G884207649, G993971353
OpenAlex ID: W7084446345
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