W dniach od 2 kwietnia do 5 kwietnia 2024 r. prowadzone będą prace związane z wdrożeniem nowej wersji systemu Repozytorium UJ. Nie będzie możliwe wprowadzanie nowych informacji do repozytorium. Za utrudnienia przepraszamy.
Blazars, which are radio-loud active galaxies with luminous jets aligned at small angles to the line of sight, form a rather heterogeneous population of extragalactic sources of high energy radiation. Frequently monitored over the last decades with different instruments ranging from low-frequency radio interferometers up to high and very high energy γ-ray telescopes, they enable a unique insight into the innermost parts of active galactic nuclei (AGN) where relativistic jets are launched by supermassive black holes accreting at high rates. The radiative output of blazars is however dominated by a non-thermal emission of high-energy jet particles, and hence extracting the key parameters of these systems requires a good understanding of particle acceleration processes taking place in relativistic collisionless plasma. Here I discuss some selected recent observational results on the topic obtained in the X-ray domain using the Suzaku satellite, which provides detailed broad-band spectra of blazar sources in relatively short (or very short) exposures. Such good-quality spectra are necessary for a precise characterization of the jet variability and energetics. I also comment on the prospects for the X-ray polarimetry of blazar sources with the Soft Gamma-ray Detector onboard the ASTRO-H satellite to be launched in 2015.