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The policies governing the JWST Cycle 1 General Observer (GO) and Archival Research (AR) programs in Cycle 1 are established in this Call for Proposals.

Late Breaking News

None at this time. Entries here will summarize changes in the documentation that may affect proposal preparation.

About this Document

We invite scientists to participate in Cycle 1 of the James Webb Space Telescope (JWST). The telescope and its instruments were built under the auspices of the National Aeronautics and Space Administration (NASA), the European Space Agency (ESA), and the Canadian Space Agency (CSA). Management of JWST's scientific program is carried out by the Space Telescope Science Institute (STScI). JWST observing programs are allocated against wall-clock time, with up to 6,000 hours available for general observers in this cycle, divided by program sizes as 3,500 hours for Small programs (≤ 25 hours), 1,500 for Medium programs (> 25 and ≤ 75 hours), and 1,000 for Large programs (> 75 hours). Observing time has already been allocated for Guaranteed Time Observations (GTO) and Director's Discretionary Early Release Science (DD-ERS) programs. This document establishes the goals, requirements, and policies for the General Observer (GO) and Archival Research (AR) programs in Cycle 1.

The table of contents for the web version of this document is on the right side of the page, and links there can take you to any page from any other page (click the arrow to expand the entire table of contents under "James Webb Space Telescope Call for Proposals for Cycle 1"). The links at the top of each page correspond to sections within that given page.

A PDF of this document and other documents in this site are provided on JWST Opportunities and Policies as a courtesy.  The online documentation is the authority, and will be updated with the latest information. 

Important Dates

The Cycle 1 proposal deadline is Friday, April 6, 2018, 8pm Eastern Time.

The Time Allocation Committee will meet in late June 2018, with results announced in July 2018. 

The Budget deadline is Thursday, August 30, 2018, 8pm Eastern Time.

Cycle 1 observations will start after a 6 month commissioning period. The start date will depend on when JWST launches within the March 31 - June 29 2019 launch window. Cycle 1 will have a duration of one year. Time-constrained observations can be submitted for the period October 1 2019 to December 31 2020.

Who's Responsible

Members of the Science Mission Office at STScI are responsible for the oversight of the JWST science program selection process. The members involved include Neill Reid (Associate Director for Science and Head of the Science Mission Office), Amaya Moro-Martin, Louis-Gregory Strolger, Brian Williams, and Technical Manager Brett Blacker. The Science Policies Group also includes Claus Leitherer, Alessandra Aloisi, Andy Fruchter, and Molly Peeples. As delegated by NASA Headquarters, the selection official for JWST proposals is the STScI Director.

Where To Get Help

Submit questions to the JWST helpdesk at  Consult JWST documentation at, and see for additional tools and resources. 


Next: JWST Cycle 1 Proposal Checklist and Resources

Science Justification Templates

Templates for JWST Cycle 1 Proposal PDF attachments:

Note: The templates have intentionally different margins, to accommodate about the same amount of text per page.





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