Jet Widths in HN Tau and UZ Tau-E

Spatial FWHM of the jets in HN Tau and UZ Tau E in [O I] 6300A. Dashed horizontal lines in (a) and (c) mark the +/- 1-sigma range of the instrumental FWHM measured from the stellar continuum. When extrapolated to the origin, the corrected FWHM measurements of HN Tau imply a nonzero jet width at the source of a few AU. The line drawn through the points in (b) is a best fit described in the text. The corrected UZ Tau E observations (d) are consistent with a point source to within the errors of measurement.