Zoom-in on the Hβ line is shown for the spectrum taken in 2010 and for the spectrum taken in 2012, position 2. Both spectra show clearly the P Cygni line profile of the Hβ line. Again, there is no difference in the individual line profiles for the different pixel spectra, and/or slit positions. The bottom-most panel gives the residuals of the slit spectrum in 2012 (position 2) when the spectrum at +0.6′′ (pixel 30) is subtracted from the spectrum at −2.5′′ (pixel 15) distance to the central star. Negative distances indicate directions in the south-(east) of the nebula. Positive distances indicate directions towards the north-(west).