Probability distribution function for σ_r, the velocity distribution along the line of sight for [Fe XXI], marginalized over v_r and F₀. The three dashed lines indicate the median value and the central 68% credible interval, which just barely includes the maximum likelihood value of 47 km s⁻¹. Subtracting the thermal velocity we obtain an estimate of the turbulent velocity along the line of sight for the 1 keV phase of the ICM: . The 95% upper limit on v_LOS is 227 km s⁻¹ after subtracting the thermal velocity, or 214 km s⁻¹ if we assume the emission is also aperture-filling and artificially broadened by this effect as well.