Skip to main content

Guaranteed Time Observation Programs

The JWST Guaranteed Time Observations (GTO) program is designed to reward scientists who helped develop the key hardware and software components or technical and inter-disciplinary knowledge for the observatory. The program provides a total of about 16% use of the observatory over the first 3 cycles of operation.

  • Archival Research

    Programs with this icon have components that have no exclusive access period, and can be used as a basis for GO Archival  Research (AR) Proposals.

Cycle 2 GTO Programs

ID Program Title Principal Investigator AR? Instrument/Mode Allocated Hours
2757

Understanding the Origin of Boyajian's Star Occultations

Massimo Stiavelli

Icon denoting JWST Program with no exclusive access period

NIRSpec/FS
MIRI/LRS
MIRI/Imaging
5.0
2758 NIRSpec MSA Observations of Galaxies in a Parallel Field Massimo Stiavelli   NIRSpec/MOS 30.0
2759 NIRISS Exploration of the Atmospheric Diversity of Transiting Exoplanets (NEAT) David Lafreniere   NIRISS/SOSS 10.0
2760 Titan Surface and Atmosphere - JWST Cycle 2 GTO Project Jonathan Lunine   NIRSpec/IFU
MIRI/MRS
13.8
2763 SN 1987A: The Formation and Evolution of Dust in a Supernova Explosion Margaret Meixner   MIRI/MRS 6.0
2768 Uranus High Spatial Resolution Global Map from NIRCam Naomi Rowe-Gurney   NIRCam/Imaging 4.4
2770 Brown Dwarfs and Free-floating Planetary Mass Objects in Orion: Spectroscopy Mark McCaughrean   NIRSpec/MOS 20.0
2771 Structure, Excitation, and Proper Motions in the Symmetric HH212 Jet: Epoch 2 Mark McCaughrean   TBD 7.0
2772 Galactic Center Astrometry Roeland van der Marel   NIRCam/Imaging 1.6
2773 Deciphering the Extended Dust and Gas Environment of the Archetypal Type-1 AGN in NGC 4151 with JWST Jianwei Lyu   MIRI/MRS 5.9
2774 The Environment of ULAS J1120+0641 George Rieke   NIRCam/Imaging 8.1
2775 A Census of Star Formation and Early Quenching in a High-z Galaxy Cluster Stacey Alberts   NIRCam/Imaging 3.5
2778 Imaging Spectroscopy of the Coldest Imaged Exoplanet and a Low-Mass Accreting Protoplanet Marshall Perrin   NIRSpec/IFU
MIRI/MRS
7.5
2780 Coronagraphic Imaging of Scattered light Debris Disks - Cycle 2 Andras Gaspar   NIRCam/Coronagraphy 28.0

 

Cycle 1 GTO Programs

The approved GTO programs in Cycle 1 are organized by science topic. To view details about a specific program, select a science category below, then click the Program ID.

Accordion

This site is protected by reCAPTCHA and the Google

Webb Space Telescope insignia

 

For technical assistance, please contact the JWST Help Desk.

 

The NASA James Webb Space Telescope, developed in partnership with ESA and CSA, is operated by AURA’s Space Telescope Science Institute.