Superposition of the HL/XZ Tau FP images in the monochromatic [S ii] λ6716 Å line emission (greyscale) and low-velocity Hα emission (contours). The Hα observations were performed in Sept. 2001 (see Sect. 2), the [S ii] data were taken in Jan. 2003 (Movsessian et al. 2007). Knot A (shown by arrow) is visible only in Hα and appears as a continuation of the Hα emission arcuate structure west of XZ Tau.