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The combination of in-situ measurements from the Juno spacecraft and remote X-ray observations have provided tantalising clues towards the processes that permit rapidly-rotating magnetised bodies to produce X-ray aurora. Since Juno does not carry an X-ray instrument comma AO 18 presents unique opportunities which may definitively identify the acceleration process-es that allow Jupiter to produce X-ray aurorae. We willdoublePoint1. Identify whether magnetic unloading triggers the X-ray aurora by testing for correlations between X-ray auroral emissions and simultaneous Juno measurements of the plasma sheet. 2. Identify and quantify the auroral acceleration process-es at Jupiter by testing for correlations between X-ray spectral fluxes and in-situ electron and ion fluxes and multi-waveband observations.