Amendment 40: Revised Text and Budget for D.9 NuSTAR General Observer Program Cycle 8

The NuSTAR General Observer (GO) Program solicits proposals for basic research relevant to the Nuclear Spectroscopic Telescope Array (NuSTAR) Small Explorer (SMEX) mission, the first orbiting telescope to focus light in the high energy X-ray region of the electromagnetic spectrum (E > 10 keV), with an effective bandpass of 3–79 keV.

Proposals will be submitted in two stages, with Phase-1 focusing on the science goals and observation parameters. Selected Phase-1 proposers will be invited to submit a budget for Phase 2.

ROSES-2021 Amendment 40 releases revised text for NuSTAR General Observer Cycle 8 (ROSES D.9). The default exclusive-use period for standard-mode and Large Program NuSTAR observations has been changed from one year to six months, some clarifications regarding the exclusive-use period have been made and miscellaneous minor clarifications and updates have been included in Table 1 and Sections 1.3, 1.3.1, and 2.2.1. The overall budget has been increased. New text is in bold and deleted text is struck through. The due date for proposals remains unchanged; Phase-1 proposals are due January 28, 2022, via ARK/RPS.

On or about October 21, 2021, this Amendment to the NASA Research Announcement "Research Opportunities in Space and Earth Sciences (ROSES) 2021" (NNH21ZDA001N) will be posted on the NASA research opportunity homepage at https://solicitation.nasaprs.com/ROSES2021.

Technical questions concerning this program element may be directed to Tod Strohmayer at tod.e.strohmayer@nasa.gov and programmatic information may be obtained from Hashima Hasan at hhasan@nasa.gov.