Würzburg 2018 – scientific programme

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T: Fachverband Teilchenphysik

T 54: Gammaastronomie II

T 54.7: Talk

Wednesday, March 21, 2018, 18:10–18:25, Philo-HS7

Wavelet Denoising for Transient Search — •Lena Linhoff, Kai Brügge, and Jana Moschner — TU Dortmund

Astrophysical transient events are phenomena where a huge amount of high energy radiation is emitted over short timescales (a few minutes) such as gamma ray bursts, supernovae or transits. Cherenkov telescopes like CTA in its final setup will be able to see such short flares in the gamma ray regime on unknown positions. Since transients appear in an unpredictable manner, it necessary to detect these short events during the regular data taking. Due to very limited observation time the data taken from transient events is very noisy and dominated by background events and steady sources in the field of view. A wavelet transform is an application known from digital image processing to denoise images and is used in this context to find transient events in the field of view of Chrerenkov telescopes.