Building a robust sample of Fermi-LAT blazars that exhibit periodic gamma-ray emission

Discussion timeslot (ZOOM-Meeting): 13. July 2021 - 18:00
ZOOM-Meeting URL: https://desy.zoom.us/j/98542982538
ZOOM-Meeting ID: 98542982538
ZOOM-Meeting Passcode: ICRC2021
Corresponding Session: https://icrc2021-venue.desy.de/channel/48-Modelling-AGN039s-spectral-energy-distribution-GAD-GAI-MM/77
Live-Stream URL: https://icrc2021-venue.desy.de/livestream/Discussion-04/5

Abstract:
'Blazars can show variability on a wide range of timescales. However, the search for periodicity in the gamma-ray emission of blazars remains an on-going challenge. This contribution will show the results obtained when a systematic pipeline is used to implement ten well-established methods for searching for periodicity. We analyze the most promising candidates selected from our previous work, extending the Fermi-LAT light curves over three more years, for a total telescope time of twelve years. These improvements have allowed us to build the first sample of blazars that display a periodicity detected at a significance larger 5sigma. Finally, we will discuss the potential origins for the periodic behavior observed in blazars.'

Authors: Pablo Peñil | Alberto Dominguez | Marco Ajello | Sara Buson on behalf of the Fermi-LAT collaboration
Collaboration: Ferrmi-LAT

Indico-ID: 957
Proceeding URL: https://pos.sissa.it/395/636