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Fig. 5

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Sample of spectra taken directly from the HASH database for comparison and to show what the HASH interactive spectral plotting utility looks like. Individual emission lines can be identified and labelled. Various spectra can be overplotted and the cursor used to zoom in on interesting regions. In this example the green spectra are from the SAAO 1.9 m professional telescope and the red spectra are from our amateur 0.2 m telescope. Top left: Kn 42 True PN; top right: MPA J1827-1328 True PN; bottom left: PM 1-322, possible symbiotic system; bottom right: Kn 134, emission-line galaxy.

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