NuSTAR Bringing the High Energy Universe into Focus


For Proposers

NuSTAR has been approved to continue operations through 2020 (subject to review by the 2019 NASA Astrophysics Senior Review of Operating Missions) including a General Observer (GO) Program.
Upcoming opportunities to propose for NuSTAR observing time:
2019-01-18 NuSTAR  GO cycle 5

Proposal due date is    March 29th, 2019  at  4:30pm EDT

The NuSTAR  GO cycle 5 Phase-1 proposal due date was amended on January 31st, 2019 due to the partial federal government shutdown.

The start date for observations in cycle 5 is now   July 1st, 2019 

The original proposal due date was January 25th, 2019  and the original start date for observations was June 1st, 2019.

Please note that the ARK/RPS website remains open to accept proposals.

NuSTAR  GO cycle 5 solicitation

New for cycle-5:

  • A Large Program category has been added
    • For proposals requesting a total of 500 ks or more
    • Up to 2 Ms of exposure time is available for large programs
  • Proposals may request joint observations with NICER
    • Up to 250 ks of NICER  exposure time has been made available to the NuSTAR  GO
The total amount of time allocated to GO observations is 11.8 Ms (~65% of the total observing time per year) including up to 8.5 Ms of observing time awarded to selected NuSTAR GO program investigations. It is anticipated that approximately 50 investigations will be selected for implementation in each NuSTAR GO cycle.
Of the remaining time (~ 3 Ms):
  • up to 1.5 Ms of NuSTAR observing time is expected to be awarded to joint NuSTAR/XMM-Newton proposals submitted to the XMM-Newton Cycle 18 Call for Proposals with proposals due on October 5th, 2018. The list of accepted proposals for cycle-17 is available on the XMM-Newton OTAC results website.
  • up to 1.0 Ms of NuSTAR observing time for joint NuSTAR / Chandra observing projects submitted to the Chandra  Call for Proposals. Note that this includes up to 0.5 Ms reserved for V/LP programs. See CXC website for Cycle-20 peer review recommended programs. The proposal due date for Chandra cycle-21 is expected to be in March, 2019.
  • up to 100 ks of NuSTAR observing time for joint NuSTAR / INTEGRAL observing proposals submitted to the INTEGRAL Cycle 17 announcement of opportunity. The deadline for INTEGRAL AO-17 proposals is expected to be in April, 2019.
  • up to 300 ks of NuSTAR observing time for joint NuSTAR / Swift proposals is expected to be available in Swift cycle-15, with proposals due in September 2018.
    • Note that as a service to the community, "snapshot" (1 - 2 ks) observations are performed by NASA’s Swift mission for most NuSTAR observations (including GO programs).
  • up to 400 ks of NuSTAR observing time for joint NuSTAR / NICER proposals is expected to be available in NICER cycle-1, with proposals due on December 20th, 2018.
For the most complete list of planned and observed targets, as well as any ToOs that may be triggered before the beginning of Cycle 5 observations on June 1st 2019, please refer to the NuSTAR  Master Catalog at the HEASARC, which may be queried using either Browse or Xamin and the list of approved NuSTAR  ToO programs available on the NuSTAR  SOC website.
The remaining 35% of the observing time will be allocated through the NuSTAR  project as follows:
  • NuSTAR  legacy survey observations (~ 10% of the total observing time)
  • NuSTAR  PI discretionary time, including unanticipated ToO observations open to the scientific community (~ 15%)
  • Calibration observations, engineering tasks, and resolving operational issues (~ 10%).
Please see the NuSTAR  HEASARC Page for the latest information about NuSTAR. We've also provided useful links on the left including links to the NuSTAR observation constraint checker, the NuSTAR simulation toolkits, and details of the approved NuSTAR  legacy survey programs.