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30 May 2023
The Spring 2023 Newsletter of the American Astronomical Society (AAS) High Energy Astrophysics Division (HEAD) is now available for download from the HEAD website. The newsletter contains reports from the Physics of the Cosmos office, many of the PhysPAG’s Science Interest Groups (SIGs), as well as from many instruments of special relevance to PhysCOS scientists, such as Chandra, NICER, XMM-Newton, and others.