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Fig. A.1


Screenshot of QtClassify, the software for classification of emission line sources detected in wide-field IFS datacubes (Kerutt 2017). All graphical panels are interactive. The top row panels display sections of a spectrum extracted from the datacube at the position of the detected emission line under scrutiny. The aperture radius for extraction, the limits of the y-axis, as well as the degree of smoothing of the spectrum can be changed interactively using the sliders at the bottom. The positions of displayed sections are adjusted to show regions around possible veto lines under the users guess for the nature of the detected emission line. Below the spectra pseudo-narrow band images at the veto line positions are displayed. Here the cut-levels as well as the width of the narrow-band window can be altered interactively at the bottom right section of the GUI. The bottom row of panels displays the corresponding layers from LSDCat’s S/N-cube. Both the spectral position of the centre-row panels and the bottom-row panels can be changed simultaneously with a slider or by moving the pointer in the top-row panels. On the bottom of the window an overview over the whole extracted spectrum is displayed, and at the right side of the window a cut-out from 2D imaging data can be shown. The example shown here demonstrates the classification of a rather weak [O iii] emission line. For this object other lines (O ii, Hβ, and [O iii] λ4959) are below the detection threshold, but can still be visually identified in the different panels of the window.

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