Jul 12 – 23, 2021
Europe/Berlin timezone

The variability patterns of PG 1553+113: a MAGIC perspective

Jul 15, 2021, 12:00 PM
1h 30m


Talk GAI | Gamma Ray Indirect Discussion


Elisa Prandini (Padova University)


PG1553+113 is one of the few blazars with a convincing quasi-periodic emission in the gamma-ray band detected by the Fermi-LAT satellite. The source is also a very high-energy (>100 GeV) gamma-ray emitter. The MAGIC collaboration started a multi-year, multi-wavelength monitoring campaign of PG 1553+113 in 2015 involving several instruments in the radio, infra-red, optical photometry and polarimetry, UV, and soft X-ray bands. The purpose of the campaign is to characterise the properties of its broadband emission, in particular the variability at different timescales and energies, with the ultimate goal of pinpointing the physical processes at work in the jet driving the emission variability. In this contribution the main results of the campaign will be presented with a particular emphasis on the multi-year light curve from MAGIC and its connection to the periodicity seen in gamma rays by Fermi-LAT and, possibly, in the optical waveband, too.


Blazar; gamma rays; multi-wavelength; periodicity; MAGIC; IACT; extra-galactic

Subcategory Experimental Results
Collaboration MAGIC

Primary authors

Elisa Prandini (Padova University) Antonio Stamerra (INAF) Talvikki Hovatta (Aalto University and Tuorla observatory, Finland) Mr Tommaso Aniello (INAF) Paolo Da Vela (University of Innsbruck) Luca Foffano (University of Geneva - DPNC) Dr Ioannis Liodakis (Finnish Center for Astronomy with ESO) Dr Pablo Peñil (Clemson U.) Sofia Ventura (Università di Siena)

Presentation materials