A model for fast extragalactic radio bursts

Understand

Bursts of millisecond duration were recently discovered in the 1 GHz band.

• There is a strong evidence that they come from $\sim 1 $ Gpc distances, which implies extraordinary high brightness temperature.
• I propose that these bursts could be attributed to synchrotron maser emission from relativistic, magnetized shocks.
• At the onset of the magnetar flare, a strongly magnetized pulse is formed, which propagates away through the relativistic magnetar wind and eventually reaches the nebula inflated by the wind within the surrounding medium.