Searching for Saturn's X-rays during a rare Jupiter Magnetotail Crossing using Chandra
D. M. Weigt, W. R. Dunn, C. M. Jackman, R. Kraft, G., Branduardi-Raymont, J. D. Nichols, A. D. Wibisono, M. F. Vogt, G. R., Gladstone

TL;DR
This study used Chandra X-ray observations during a rare planetary alignment to search for Saturn's X-ray emissions but found none, highlighting the need for future high-resolution telescopes to explore Saturn's elusive X-ray aurora.
Contribution
First X-ray observations during Saturn's passage through Jupiter's magnetotail, providing upper flux limits and emphasizing the importance of next-generation telescopes for studying Saturn's X-ray aurora.
Findings
No significant Saturn X-ray emissions detected.
Upper flux limits consistent with previous models.
Highlights need for future high-resolution X-ray observations.
Abstract
Every 19 years, Saturn passes through Jupiter's 'flapping' magnetotail. Here, we report Chandra X-ray observations of Saturn planned to coincide with this rare planetary alignment and to analyse Saturn's magnetospheric response when transitioning to this unique parameter space. We analyse three Director's Discretionary Time (DDT) observations from the High Resolution Camera (HRC-I) on-board Chandra, taken on November 19, 21 and 23 2020 with the aim to find auroral and/or disk emissions. We infer the conditions in the kronian system by looking at coincident soft X-ray solar flux data from the Geostationary Operational Environmental Satellite (GOES) and Hubble Space Telescope (HST) observations of Saturn's ultraviolet (UV) auroral emissions. The large Saturn-Sun-Earth angle during this time would mean that most flares from the Earth-facing side of the Sun would not have impacted Saturn.…
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