Fig. 15.
Left: electron density computed with PYNEB, for an assumed temperature Te ∼ 8000 K. HII region contours are overlaid in black. Grey-shaded areas indicate bins where the observed line ratio is below the sensitivity limit of the method (see bottom panel of Fig. 12). Inset panel: zoom-in into the planetary nebula candidate PN2 (red cross; see Table 2). Right: relative error on the [SII]6716/6731 line ratio. The recovered values are below 7% over all the FoV.
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