Small GO proposals

Small GO Proposals are those that request less than or equal to 25 hours of total time. It is anticipated that approximately 3500 hours will be available for allocation to Small Proposals in Cycle 1. Small Proposals will have a default exclusive access period of 12 months.

Medium GO proposals

Medium GO Proposals are those that request above 25 hours but less than or equal to 75 hours of total time. The Medium Proposal category exists to ensure that compelling science programs that demand a medium-size hour request have appropriate opportunities for success. It is anticipated that approximately 1500 hours will be available for GO medium proposals in Cycle 1. Medium Proposals will have a default exclusive access period of 12 months.

Large GO proposals

Large Proposals are those that request more than 75 hours of total time. These programs should lead to a clear advance in our understanding in an important area of astronomy. They must use the unique capabilities of JWST to address scientific questions in a comprehensive approach that is not possible in smaller time allocations. Selection of a Large Proposal for implementation does not rule out acceptance of Small or Medium Proposals to do similar science, but target duplication and overall program balance will be considered.

Approximately 1000 hours will be made available to Large and Treasury Proposals in Cycle 1. Data taken for Large Proposals will, by default, have no exclusive access period. Proposals may request an exclusive access period; that request should be justified in the "Special Requirements" section of the proposal and will be subject to TAC review.

Next: Joint JWST-HST Observing Programs