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Table 2:

General and instrument-specific parameters of the data-reduction algorithms of P3D.

Step
Property All PMAS VIRUS-P SPIRAL Parameter name in P3D
      LARR PPAK bundle 1/bundle 2 both arms  
Automatic tracing algorithm, cf. Sect. 3.1:
  n   256 382 246 512 SPNUM
1a $\left(n_{\rm p}-1\right){\rm bin}_\lambda/2$   40 40 29 30 FINDWIDTH_TR
  $\xi$   0.9 0.9 0.9 0.95 CUT_TR
1b $d~{\rm bin}_\dagger$   12.5 9.5 8.0 4.0 DIST_TR
  $\delta_{\rm min}{\rm bin}_\dagger$   4.0 3.0 2.0 1.0 DMIN_TR
  $\delta_{\rm max}{\rm bin}_\dagger$   5.5 4.0 4.0 2.5 DMAX_TR
1c $\left(w_{\rm cc}-1\right){\rm bin}_\dagger/2$ 2   CENTERVAR_TR
  $G_{\rm w}{\rm bin}_\dagger$   4.0 4.5 5.0/4.2 2.3 FWHM_TR
  $n_{\rm it}$ 9   NITERAT_TR
2 f 10   REFINDDIST_TR
  $\left(w_{\rm a}-1\right){\rm bin}_\lambda/2$ 10   REFINDWIDTH_TR
  $\left(w_{\rm c}-1\right)/2$ 10   SMOWIDTH_TR
  $\left(w_{\rm d}-1\right)/2$ 5   DISPSMOWIDTH_TR
Spectrum extraction, cf. Sects. 3.2.1-3.2.3:
  $\left(x_{\rm w}-1\right){\rm bin}_\dagger/2$   6.0 4.5 3.4/3.3 1.5 PROFWIDTH_EX
  $\left(\overline{x}_{\rm w}-1\right){\rm bin}_\dagger/2$   8.0 8.0 8.0 5.0 PROFWIDTH_CTEX
  $n_{{\rm mpd}}$ 1   MPDNPROF
Line profile fitting, cf. Sects. 3.2.2, 3.2.3:
  ml   16 31-32 21-44/14-29 32 LPROFN_TR
  $n_{\rm f}{\rm bin}_\lambda$   42 12 104 22 LPROFDINT_TR
Dispersion mask creation, cf. Sect. 3.3:
  p 4   POLYNOMIALORDER_DM
  $\left(s_{\rm w}-1\right){\rm bin}_\lambda/2$ 4   LINEWIDTH_DM
Flat fielding, cf. Sect. 3.4:
  $\left(w_{\rm ff}-1\right){\rm bin}_\lambda/2$ 20   SMOWIDTH_FF
  $p_{\rm ff}$ 7   DEG_POLYFIT_FF

Notes. Except for the dimensionless properties n, $\xi$, $n_{\rm it}$, ml, $n_{\rm f}$, p, and $p_{\rm ff}$ the unit is pixels. Column 3: default values of general parameters. Last column: the name as it is specified in the instrument-specific parameter file of the program code.


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