Bonn 2020 – scientific programme

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T: Fachverband Teilchenphysik

T 100: Gamma astronomy II

T 100.2: Talk

Friday, April 3, 2020, 11:15–11:30, H-HS XVI

FACT - Highlights from an Unbiased Monitoring Program — •Thomas Bretz¹ and Daniela Dorner² for the FACT collaboration — ¹RWTH Aachen, III. Physikalisches Institut A — ²Universität Würzburg, Lehrstuhl für Astronomie

The First G-APD Cherenkov Telescope (FACT) has been monitoring bright sources at TeV energies for over eight years, collecting a total of more than 14000 hours of physics data. Using semi conductor photosensors, the duty cycle is maximized and gaps in the light curves minimized. Unbiased monitoring yields an unprecedented data sample and allows for systematic studies of source variability. In addition, a lot of multi-wavelength observations are triggered. One on Mrk 501 in 2014 allowed for a variability studies in gamma rays. In 2016, an unprecedented study of the intermittent extreme blazar 1ES 2344+51.4 was triggered. The long-term sample is studied for multi-wavelength correlations, e.g. a 5.5 year sample of Mrk 421, and periodic oscillations. Recent results from these studies will be presented.