File Name : figure a1.tif

Caption : an electron image of xe photoionized at 27 ev, accumulated for one hour. plotted over the surface are the fitted contours of the multidimensional polynomial 2d-surface function which is used to calibrate the detector spatial response.

File Name : figure a2.tif

Caption : abel-inverted image of the photoelectron signal accumulated at 10.5 ev. the polarization axis is set horizontal in the image.

File Name : figure a3.tif

Caption : (upper left corner) anisotropy parameters over the first photoelectron band. (upper right corner) anisotropy parameters (black squares) that have been averaged over the first photoelectron band, and theoretical values obtained by venuti <i>et al.</i> and ponzi <i>et al.</i> (lower left corner) anisotropy parameters over the second band. (lower right corner) anisotropy parameters over the third band.