D.3 Astrophysics Research and Analysis Clarification

Subsection 1.2.4, "Laboratory Astrophysics" of D.3 Astrophysics Research and Analysis (APRA) has been modified to more clearly explain what is included in that category. New text is in bold and deleted text is struck through. Regarding the removal of the reference to exoplanetary systems, it had already been noted, in Section 1.2 "Categories of Proposals" that "This program element excludes proposals for investigations that are in scope of the Exoplanet Research Program", so this is not a change in scope. Due dates remain unchanged: Notices of Intent to propose are requested by November 19, 2021, and the proposal deadline remains December 16, 2021, predicated on the release of the 2020 Decadal Survey of Astronomy and Astrophysics at least 30 days prior.

Questions regarding D.3 APRA or this clarification may be directed to Dominic Benford, the main point of contact at dominic.j.benford@nasa.gov. Questions about specific discipline areas may be directed to the relevant Program Officers listed at the end of the APRA text.