JWST Cycle 1 Proposal Opportunities

The James Webb Space Telescope will offer proposal opportunities for General Observers (GO), Guaranteed-Time Observers (GTO), and Early Release Science Programs (DD ERS) during Cycle 1. JWST is scheduled for launch in March 30, 2021. Science observations will commence after a 6 month commissioning phase. The Cycle 1 GO Call will be released on January 23, 2020 with a proposal deadline of May 1, 2020.

We invite scientists to participate in the first cycle of investigations with the James Webb Space Telescope (JWST). JWST is an international collaboration between NASA, the European Space Agency (ESA), and the Canadian Space Agency (CSA). JWST is operated and managed by AURA's Space Telescope Science Institute (STScI). The links below provide information, policies, deadlines, and instructions for proposing opportunities with JWST in Cycle 1.



Important dates

Stage 1

Release of the Cycle 1 Call for GTO proposals

April 25, 2019

APT version 27.2 released

May 23, 2019

Deadline for revised GTO APT submission

June 25, 2019

Stage 2

Release of the Cycle 1 GO Call for Proposals

January 23, 2020

APT version 28.1 released (Cycle 1 reference version)early March, 2020
Final APT proposal submissionMarch 31, 2020

Cycle 1 GO Proposal deadline

May 1, 2020



JWST opportunities and policies