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Multi-Wavelength Properties of the 2021 Periastron Passage of PSR B1259-63

Santangelo, Andrea; Pühlhofer, Gerd; Chernyakova, Maria +9 more

PSR B1259-63 is a gamma-ray binary system hosting a radio pulsar orbiting around a O9.5Ve star, LS 2883, with a period of ∼3.4 years. The interaction of the pulsar wind with the LS 2883 outflow leads to unpulsed broadband emission in the radio, X-ray, GeV, and TeV domains. One of the most unusual features of the system is an outburst of GeV energi…