ROSES-25 D.3 AGIGO: NuSTAR General Observer Second Opportunity in ROSES-25

The Nuclear Spectroscopic Telescope Array (NuSTAR) General Observer (GO) Program solicits proposals for basic research relevant to the NuSTAR mission. NuSTAR Cycle 13 will commence on or about 1 June 2027, and last for a nominal period of 12 months. The total amount of time allocated to General Observers during NuSTAR Cycle 13 is expected to be 11.7 Ms (73% of the total available observing time), of which 8.5 Ms will be allocated to NuSTAR observations selected through this program element.

Amendment 76 announces the second opportunity to propose to the NuSTAR General Observer (GO) program in ROSES-25. The due date for Phase-1 Proposals, submitted via the Astrophysics Research Knowledgebase Remote Proposal System (ARK RPS), is 28 January 2027. The text for this new opportunity may be found in Section 11 of D.3 Combined General Investigator General Observer Program.

Please direct programmatic questions concerning NuSTAR to Hashima Hasan at hhasan@nasa.gov, and technical questions to Francesca Civano at francesca.m.civano@nasa.gov.

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