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March 30, 2021

About This Article

STScI announces the selected JWST General Observer programs for Cycle 1. This follows the review of submitted proposals by the JWST Telescope Allocation Committee, which made recommendations to the STScI Director, who approved the final selection. The selection is scientifically balanced, with a distribution of science categories that broadly matches the submitted proposals. More detailed information about the approved proposals is now available.

The Cycle 1 GO program includes 266 proposals for approximately 6,000 hours of JWST prime time and up to 1,231 hours of parallel time, as well as 15 archival and 5 theory proposals. This milestone completes the definition of the first year of JWST science, as envisioned by a broad, worldwide community of observers. The selected proposals were prepared by more than 2,200 unique investigators from 41 countries, including 43 US states and territories, 19 ESA member states, and 4 Canadian provinces.

The Cycle 1 GO prime time is distributed as follows:

  • 52% to small programs (less than 25 hours)
  • 32% to medium programs (25 to 75 hours)
  • 16% to large programs (more than 75 hours)

The 13 new large and treasury programs will produce data that are immediately available to the community.  

The first year of JWST science is now fully defined. Selection of the General Observer programs represents a tremendous effort by the ~4,300 investigators who submitted proposals, the almost 200 members of the Telescope Allocation Committee, and the JWST teams at STScI and NASA.

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The NASA James Webb Space Telescope, developed in partnership with ESA and CSA, is operated by AURA’s Space Telescope Science Institute.