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NASA/MSFC/CXC/CXO/ESA/STScI/AURA/W.M. Keck Observatory/Kuntz et al. 2023/Wharton et al. 2026/Bhardwaj et al. 2005/Dennerl et al. 2006/J. Spencer/W. Dunn et al. 2016;2021/Elsner et al.2005