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James Webb Space Telescope Cycle 4 Call for Proposals

12 August 2024

We are pleased to announce the release of the Cycle 4 Call for Proposals for the James Webb Space Telescope (JWST) General Observer time and funding for Archival Research and Theoretical Research programs. Participation in this program is open to all categories of organizations, both domestic and foreign, including educational institutions, profit and nonprofit organizations, NASA Centers, and other government agencies.

Proposals are due by 8p Eastern (5p Pacific) on Wednesday 16 October 2024. The version of the Astronomer's Proposal Tools (APT) required for proposal submission is 2024.5 or higher. This version will be delivered around 22 August 2024. We encourage prospective investigators to start preparing their proposals as soon as possible.

The Cycle 4 Telescope Allocation Committee will meet at the end of January/early February 2025, with selections announced in March 2025.

For details, please consult the full Call for Proposals. There have been significant changes, notably to page lengths and Science Categories. Please be sure to consult the What's New section for more information, and submit questions to the JWST Help Desk.

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An illustration of Sun-like star HD 181327 and its surrounding debris disk. The star is at top right. It is surrounded by a far larger debris disk that forms an incomplete ellpitical path and is cut off at right. There’s a huge cavity between the star and the disk. The debris disk is shown in shades of light gray. Toward the top and left, there are finer, more discrete points in a range of sizes. The disk appears hazier and smokier at the bottom. The star is bright white at center, with a hazy blue region around it. The background of space is black. The label Artist's Concept appears at lower left.