Left panels: fits of the Fe XXI 1354.1 Å line (green) for slit position y = 122″. The observed spectrum is shown by the stepped black line, with the total fit in black on top; cooler components are shown by a dotted line. The non-thermal FWHM, v_nt, is also shown. Right panels: Mg II subordinate line with bisector positions at 10% intensity increments marked by black squares, and the rest wavelength (2791.56 Å) by the vertical dashed line.