Table 1.

Summary of model properties

Model	Multiwavelength polarization	X-ray polarization variabilitya	X-ray polarization angle
Single zone	Constantb	Slow	Any
Multizone	Mildly chromatic	High	Any
Energy stratified (shock)	Strongly chromatic	Slow	Along the jet axis
Magnetic reconnection (kink instability)	Constant	Moderate	Perpendicular to the jet axis
Observed	Strongly chromatic	Slow	Along the jet axis

First, we find an increasing Π towards higher frequencies. Second, we do not find significant variability during the 2–3-day-long IXPE observations, and finally, we find a rough alignment of ψ with the jet axis from radio to X-rays. Therefore, a shock-accelerated, energy-stratified electron population model satisfies all our multiwavelength polarization observations.

^aSlow variability, a few days to a week; moderate variability, days; high variability, less than 1 day.

^bThere is a slight dependence on the slope of the emission spectrum.