Amendment 55: D.9 NuSTAR Cycle 10 Corrections

The NuSTAR General Observer (GO) Program solicits proposals for basic research relevant to the NuSTAR mission. NuSTAR Cycle 10 will commence on or about June 1, 2024, and last for a nominal period of 12 months. Based upon the outcome of the 2022 NASA Astrophysics Senior Review process, NuSTAR operations are currently funded through September 30, 2025. Further details on the Cycle 10 program may be found on the NuSTAR GO Program website at

ROSES-2023 Amendment 55 makes a few changes to program element D.9 NuSTAR Cycle 10. Table D.9-2 has been corrected, primarily to indicate that a “work plan” is not required. The statement in Section 1.3 about requesting NuSTAR time through the upcoming INTEGRAL observing cycle has been updated to take the delayed start of INTEGRAL’s Cycle 21 into account. New Text is in bold and deleted text is struck through. The due date remains unchanged: Phase-1 proposals are due by 4:30 p.m. Eastern Timeon 01/25/2024 via ARK RPS.

On or about October 12, 2023, this Amendment to the NASA Research Announcement "Research Opportunities in Space and Earth Sciences (ROSES) 2023" (NNH23ZDA001N) will be posted on the NASA research opportunity homepage at

Technical questions concerning D.9 NuSTAR Cycle 10 may be directed to Tod Strohmayer at Programmatic information may be obtained from Hashima Hasan at

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