PoS - Proceedings of Science
Volume 395 - 37th International Cosmic Ray Conference (ICRC2021) - GAD - Gamma Ray Direct
Building a robust sample of Fermi-LAT blazars that exhibit periodic gamma-ray emission
P. Peñil*, M. Ajello, S. Buson, A. Dominguez and S. Larsson
Full text: pdf
Pre-published on: July 06, 2021
Published on: March 18, 2022
Blazars can show variability on a wide range of timescales. However, the search for periodicity in the $\gamma$-ray emission of blazars remains an ongoing challenge. This contribution will show the results obtained when a systematic pipeline is used to implement ten well-established methods to search for periodicity. We analyze the most promising candidates selected from our previous work, extending the \textit{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 $>5\sigma$. Finally, we will discuss the potential origins of the periodic behavior observed in blazars.
DOI: https://doi.org/10.22323/1.395.0636
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