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General Observer Programs in Cycle 3

The proposals listed below establish the program for JWST’s third year of science operations. Approximately 5,500 hours of prime time and up to 1,000 hours of parallel time — as well as 25 archival and 12 theory proposals — were awarded to observing programs in Cycle 3. STScI hosted the Cycle 3 Telescope Allocation Committee in January-February 2024. The meeting was held in three stages:

  • The smallest proposals (<15 hours duration) were distributed to 250 external reviewers who graded them independently;
  • The remaining small proposals (15 to 25 hours) and medium proposals (>25 to 75 hours) were reviewed by topical panels, meeting virtually from January 29th to February 2nd;
  • And the Large (>75 hours), Treasury and Legacy proposals were reviewed by the Executive Committee, comprising the topical panel chairs, at-large members, and the TAC Chair, who met in person at STScI from February 5th to 7th.

To view details about a specific program, select a category below, then click the Program ID.

NOTE: The listing of Co-PIs in the tables below has been limited to 4. Proposals with more than 4 Co-PIs are denoted with an asterisk. The full listing is available with the proposal.

Science Categories for GO Proposals


BOTS = Bright Object Time-series

FS = Fixed Slit

GTS = Grism Time Series

IFU = Integral Field Unit

LRS = Low Resolution Spectroscopy

MOS = Multi-object Spectroscopy

MRS = Medium Resolution Spectroscopy

SOSS = Single-object Slitless Spectroscopy

TSO = Time Series Observation

WFSS = Wide Field Slitless Spectroscopy


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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.