engleski

Correction procedures for gamma-ray observations with Cherenkov telescopes under cloud presence using dedicated Monte Carlo simulations or direct image correction

Part of the observations performed with the Cherenkov telescopes in the very-high-energy gamma-ray range above 100 GeV is affected by the presence of clouds. Such observations result in modified collection area, biased energy resolution and worse shower direction reconstruction. Thus, if the effect of the absorption of Cherenkov light in the cloud is not taken into account, increased systematic uncertainties of the measurement have to be considered. In this contribution we present the studies of two complementary methods for such a correction. In the first method we use a dedicated Monte Carlo (MC) simulation to fully take into account the effect of the clouds. In the second method we apply a geometrical model correction to the images in order to correct the bulk of the effect without generation of time- consuming MC simulations.

Čerenkovljevi teleskopi ; korekcija slika ; Monte Carlo simulacije

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