Fig. 2
Left: the 4 GHz wide spectrum, centred on 219 GHz, towards the offset position (0′′, −18′′) relative to Orion H2-Peak 1. Line identifications for the entire spectral region can be found in the paper by Sutton et al. (1985). Blow-ups of the labelled lines are found in the right-hand panel, where the LSR-velocity range of the putative HOOH line is indicated with the dashed vertical lines.
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