NASA's James Webb Space Telescope

Approved GTO 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. The approved GTO programs are listed below organized by science topic.

To view details about a specfic program, click the Program ID  below.

NOTE: Programs with this icon ( Icon denoting JWST Program with no exclusive access period ) have components that have no exclusive access period, and can be used as a basis for GO Cycle 1 Archival  Research (AR) Proposals.

Solar System

ID Program Title AR? Principal Investigator Instrument
1191 Kuiper Belt Science with JWST   John Stansberry (Space Telescope Science Institute) MIRI
NIRSpec
1231 Surface Composition of Mid-sized TNOs: Searching for Ammonia   Aurelie Guilbert-Lepoutre (Institut UTINAM) NIRSpec
1244 Large Asteroids and Trojan Asteroids

Icon denoting JWST Program with no exclusive access period

Andrew Rivkin (The Johns Hopkins University Applied Physics Laboratory) MIRI
NIRCam
NIRSpec
1245 Near-Earth Objects

Icon denoting JWST Program with no exclusive access period

Cristina Thomas (Northern Arizona University) MIRI
NIRCam
NIRSpec
1246 Jupiter's Great Red Spot

Icon denoting JWST Program with no exclusive access period

Leigh Fletcher (University of Leicester) MIRI
1247 Saturn

Icon denoting JWST Program with no exclusive access period

Leigh Fletcher (University of Leicester) MIRI
NIRCam
NIRSpec
1248 Uranus

Icon denoting JWST Program with no exclusive access period

Leigh Fletcher (University of Leicester) MIRI
NIRSpec
1249 Neptune

Icon denoting JWST Program with no exclusive access period

Leigh Fletcher (University of Leicester) MIRI
1250 Probing the Sub-surface Oceans of Europa and Enceladus with JWST

Icon denoting JWST Program with no exclusive access period

Geronimo Villanueva (NASA Goddard Space Flight Center) MIRI
NIRCam
NIRSpec
1251 Titan Climate, Composition and Clouds

Icon denoting JWST Program with no exclusive access period

Conor Nixon (NASA Goddard Space Flight Center) MIRI
NIRCam
NIRSpec
1252 Spectral Mapping of a Comet's Inner Coma

Icon denoting JWST Program with no exclusive access period

Michael Kelley (University of Maryland) MIRI
NIRCam
NIRSpec
1253 ToO Comet

Icon denoting JWST Program with no exclusive access period

Stefanie Milam (NASA Goddard Space Flight Center) NIRSpec
1254 TNOs   Alex Parker (Southwest Research Institute) MIRI
NIRSpec
1255 JWST Medium-Deep Fields -- Hammel IDS GTO Program

Icon denoting JWST Program with no exclusive access period

Stefanie Milam (NASA Goddard Space Flight Center) NIRCam
1271 ToO TNOs: 'Unveiling the Kuiper Belt by Stellar Occultations'   Pablo Santos-Sanz (Instituto de Astrofisica de Andalucia (IAA)) NIRCam
1272 Kuiper Belt Science with JWST   Dean Hines (Space Telescope Science Institute) MIRI
NIRSpec
1273 Kuiper Belt Science with JWST   Jonathan Lunine (Cornell University) MIRI
NIRSpec
1415 Mars

Icon denoting JWST Program with no exclusive access period

Geronimo Villanueva (NASA Goddard Space Flight Center) NIRCam
NIRSpec

 

Extra-solar Planets

ID Program Title Principal Investigator Instrument
1177 MIRI Observations of Transiting Exoplanets Thomas Greene (NASA Ames Research Center) MIRI
1184 Survey of Nearby Young M Stars Joshua Schlieder (NASA Goddard Space Flight Center) NIRCam
1185 Transit Spectroscopy of Mature Planets Thomas Greene (NASA Ames Research Center) NIRCam
1188 Direct Spectroscopy of Non-transiting Exoplanets Klaus Hodapp (University of Hawaii) MIRI
NIRSpec
1193 Coronagraphic Imaging of Young Planets and Debris Disk with NIRCam and MIRI Charles Beichman (Jet Propulsion Laboratory) MIRI
NIRCam
1194 Characterization of the HR 8799 Planetary System and Planet Search Charles Beichman (Jet Propulsion Laboratory) MIRI
NIRCam
1195 Coronagraphic Imaging of Young Planets - Part 3 Charles Beichman (Jet Propulsion Laboratory) NIRCam
1200 Architecture of Directly-imaged Extrasolar Planetary Systems Julien Rameau (Universite de Montreal) NIRISS
1201 NIRISS Exploration of the Atmospheric Diversity of Transiting Exoplanets (NEAT) David Lafreniere (Universite de Montreal) NIRISS
NIRSpec
1224 Transiting Exoplanet Characterization with JWST/NIRSPEC Stephan Birkmann (Space Telescope Science Institute - ESA)  NIRSpec
1241 MIRI Coronagraphic Imaging of Exoplanets Michael Ressler (Jet Propulsion Laboratory) MIRI
1270 Characterizing the TWA 27 System Stephan Birkmann (Space Telescope Science Institute - ESA) MIRI
NIRSpec
1274 Extrasolar Planet Science with JWST Jonathan Lunine (Cornell University) NIRCam
1275 Spectroscopic characterization of PSO J318 Pierre-Olivier Lagage (Commissariat a l'Energie Atomique (CEA)) MIRI
NIRSpec
1276 Spectroscopic Observations of WD 0806-661B Pierre-Olivier Lagage (Commissariat a l'Energie Atomique (CEA)) MIRI
NIRCam
NIRSpec
1277 Coronographic Observations of Young Exoplanets and Spectroscopic Observations of ROSS 458 ABc Pierre-Olivier Lagage (Commissariat a l'Energie Atomique (CEA)) MIRI
NIRSpec
1278 MIRI Spectroscopic Observations of Brown Dwarfs Pierre-Olivier Lagage (Commissariat a l'Energie Atomique (CEA)) MIRI
1279 Thermal emission from Trappist1-b Pierre-Olivier Lagage (Commissariat a l'Energie Atomique (CEA)) MIRI
1280 MIRI Transiting Observation of WASP-107b Pierre-Olivier Lagage (Commissariat a l'Energie Atomique (CEA)) MIRI
1281 MIRI and NIRSPEC Transit Observations of HAT-P-12 b Pierre-Olivier Lagage (Commissariat a l'Energie Atomique (CEA)) MIRI
NIRSpec
1292 ROSS 458 ABc Jonathan Lunine (Cornell University) NIRSpec
1312 Transit and Eclipse Spectropscopy of a Warm Neptune Nikole Lewis (Space Telescope Science Institute) MIRI
NIRISS
NIRSpec
1331 Transit Spectroscopy of TRAPPIST-1e Nikole Lewis (Space Telescope Science Institute) NIRSpec
1353 Transit and Eclipse Spectropscopy of a Hot Jupiter Nikole Lewis (Space Telescope Science Institute) MIRI
NIRISS
NIRSpec
1412 Characterizing 51 Eridani Exoplanetary System Marshall Perrin (Space Telescope Science Institute) NIRCam

 

Brown Dwarfs

ID Program Title Principal Investigator Instrument
1189 NIRCam Y-Dwarfs Thomas Roellig (NASA Ames Research Center) MIRI
NIRCam
NIRISS
NIRSpec
1202 The NIRISS Survey for Young Brown Dwarfs and Rogue Planets Aleks Scholz (University of St. Andrews) NIRISS
1209 Probing the Cloud Properties of SIMP0136+0933 Etienne Artigau (Universite de Montreal) NIRISS
1228 The Physics of Brown Dwarfs - Part #1 Catarina Alves de Oliveira (Space Telescope Science Institute - ESA) NIRSpec
1229 The Physics of Brown Dwarfs - Part #2 Catarina Alves de Oliveira (Space Telescope Science Institute - ESA) NIRCam
NIRSpec
1230 The Physics of Brown Dwarfs - Part #3 Catarina Alves de Oliveira (Space Telescope Science Institute - ESA) MIRI
NIRCam
NIRISS
NIRSpec
1256 Brown Dwarfs and Free-floating Planetary Mass Objects in Orion: Imaging Mark McCaughrean (European Space Agency - ESTEC) NIRCam
1413 MIRI Coronagraphy of the Cold Substellar Companion GJ 758 B Laurent Pueyo (Space Telescope Science Institute) MIRI
1414 Integral Field Spectroscopy of the Benchmark Substellar Companion HD 19467 B Marshall Perrin (Space Telescope Science Institute) NIRSpec

 

Debris Disks and Photodissociation Regions

ID Program Title Principal Investigator Instrument
1183 Coronagraphic Imaging of Scattered light Debris Disks Andras Gaspar (University of Arizona) NIRCam
NIRSpec
1192 Physics and Chemistry of PDR Fronts Karl Misselt (University of Arizona)

MIRI
NIRCam
NIRSpec

1206 Extreme Debris Disks and Disk Variability George Rieke (University of Arizona) MIRI
1282 MIRI EC Protoplanetary and Debris Disks Survey Thomas Henning (Max-Planck-Institut fur Astronomie, Heidelberg) MIRI
NIRSpec
1294 Thermal Emission Spectroscopy of Beta Pictoris' Prototypical Debris Disk Christine Chen (Space Telescope Science Institute) MIRI
1411 Coronagraphy of the Debris Disk Archetype Beta Pictoris Christopher Stark (Space Telescope Science Institute) MIRI
NIRCam

 

Protostars, Protostellar Disks, and Young Stellar Objects

ID Program Title AR? Principal Investigator Instrument
1179 YSO Imaging   Jarron Leisenring (University of Arizona) NIRCam
1186 Protostar (YSO) Spectroscopy   Thomas Greene (NASA Ames Research Center) NIRSpec
1187 Extinction Mapping of Pre-stellar Cores   Klaus Hodapp (University of Hawaii) NIRCam
1235 LMC-N79: Study of Most Massive Young Stellar Object Star Forming Region

Icon denoting JWST Program with no exclusive access period

Margaret Meixner (The Johns Hopkins University) MIRI
NIRCam
1236 Protostellar Binaries in Perseus   Michael Ressler (Jet Propulsion Laboratory) MIRI
1257 The Young Protostellar Outflow HH211as   Thomas Ray (Dublin Institute For Advanced Studies) MIRI
NIRCam
NIRSpec
1258 Structure, Excitation, and Proper Motions in the Symmetric HH212 Jet   Mark McCaughrean (European Space Agency - ESTEC) NIRCam
1282 MIRI EC Protoplanetary and Debris Disks Survey   Thomas Henning (Max-Planck-Institut fur Astronomie, Heidelberg) MIRI
NIRSpec
1290 MIRI EC Protostars Survey   Ewine Van Dishoeck (Universiteit Leiden) MIRI
NIRSpec
1293 Collimation Zone in Protostellar Jets, the Final Frontier. MIRI MRS and Imager Simultaneous Observations   Alberto Noriega-Crespo (Space Telescope Science Institute) MIRI

 

Star Clusters, Star Formation Regions, Planetary Nebulae, and Galactic Transients

ID Program Title AR? Principal Investigator Instrument
1182 NIRCam GTO - IRDC Mapping   Erick Young (Universities Space Research Association) NIRCam
1190 Embedded Cluster Survey   Michael Meyer (University of Michigan) NIRCam
1232 SN 1987A: The Formation and Evolution of Dust in a Supernova Explosion

Icon denoting JWST Program with no exclusive access period

Gillian Wright (United Kingdom Astronomy Technology Centre) MIRI
NIRSpec
1237 Star Formation in the Extreme Outer Galaxy   Michael Ressler (Jet Propulsion Laboratory) MIRI
1238 Sparse Spectral Mapping of NGC 1514   Michael Ressler (Jet Propulsion Laboratory) MIRI
1239 Investigating Dusty Disks in Evolved Stars   Michael Ressler (Jet Propulsion Laboratory) MIRI
1240 De-mystifying SPRITES with JWST   Michael Ressler (Jet Propulsion Laboratory) MIRI
NIRSpec
1242 Planets in Formation and Exozodiacal Disks   Doug Johnstone (NRC Herzberg Institute of Astrophysics) NIRISS
1306 Galactic Center Astrometry

Icon denoting JWST Program with no exclusive access period

Roeland van der Marel (Space Telescope Science Institute) NIRCam

 

Targeted Galaxies

ID Program Title AR? Principal Investigator Instrument
1176 JWST Medium-Deep Fields -- Windhorst IDS GTO Program

Icon denoting JWST Program with no exclusive access period

Rogier Windhorst (Arizona State University) NIRCam
NIRSpec
1178 Ram Pressure Stripping in ESO 137-001   Scott Friedman (Space Telescope Science Institute) MIRI
1223 NIRSpec GTO observations of NGC 4654   Torsten Boeker (Space Telescope Science Institute - ESA) NIRSpec
1225 Star Formation in the Local Grouroup - NGC 3603   Guido De Marchi (European Space Agency - ESTEC) NIRSpec
1226 Star Formation in the Local Group - NGC 2070 (30 Dor)   Guido De Marchi (European Space Agency - ESTEC) NIRSpec
1227 NGC 346: Star Formation at Low Metallicity in the Small Magellanic Cloud

Icon denoting JWST Program with no exclusive access period

Margaret Meixner (The Johns Hopkins University) MIRI
NIRCam
NIRSpec
1233 I Zw 18: Dust Life Cycle at Very Low Metallicity

Icon denoting JWST Program with no exclusive access period

Margaret Meixner (The Johns Hopkins University) MIRI
NIRCam
1234 NGC 6822: Dust Life Cycle Study of a Nearby Low Metallicity Galaxy

Icon denoting JWST Program with no exclusive access period

Margaret Meixner (The Johns Hopkins University) MIRI
NIRCam
1260 NGC 1068 as Proving Ground for NIRISS AMI

 

K. E. Saavik Ford (City University of New York Borough of Manhattan Comm Coll) NIRISS
1265 NGC 6240   Almudena Alonso-Herrero (Centro de Astrobiologia (CSIC/INTA) Inst. Nac. de Tec. Aero.) MIRI
NIRSpec
1266 NIRSpec & MIRI Integral-Field Spectroscopy of the Galactic Center   Macarena Garcia Marin (Space Telescope Science Institute) MIRI
NIRSpec
1267 NIRSpec+MIRI IFU Observations of Arp220   Daniel Dicken (Commissariat a l'Energie Atomique (CEA)) MIRI
NIRSpec
1268 NIRSpec & MIRI Integral-Field Spectroscopy of the Nucleus of Mrk 231   Roberto Maiolino (University of Cambridge) MIRI
NIRSpec
1269 NIRSpec Observations of Centaurus-A: A GTO Program Proposal   Nora Luetzgendorf (Space Telescope Science Institute - ESA) MIRI
NIRSpec
1304 Internal Dynamics of Milky Way Dwarf Spheroidal Galaxies   Roeland van der Marel (Space Telescope Science Institute) NIRCam
1305 Dynamics of the Andromeda Galaxy Satellite System   Roeland van der Marel (Space Telescope Science Institute) NIRCam

 

Clusters of Galaxies

ID Program Title AR? Principal Investigator Instrument
1199 The Metallicity of Galaxies in the MAC J1149.5+2223 Field

Icon denoting JWST Program with no exclusive access period

Massimo Stiavelli (Space Telescope Science Institute) NIRCam
NIRSpec
1208 CANUCS: The CAnadian NIRISS Unbiased Cluster Survey   Chris Willott (Dominion Astrophysical Observatory) NIRCam
NIRISS
NIRSpec

 

High-redshift Quasars and Galaxy Assembly

ID Program Title Principal Investigator Instrument
1198 IFU Apectroscopy of the Host Galaxies of Strongly Lensed Quasars Massimo Stiavelli (Space Telescope Science Institute) NIRCam
NIRSpec
1205 Formation Histories and Stellar Masses of Very High-z Quasars George Rieke (University of Arizona) NIRCam
NIRSpec
1218 NIRSpec-IFU Observations of Two QSOs at z=6 Pierre Ferruit (European Space Agency - ESTEC) NIRSpec
1219 NIRSpec and MIRI spectroscopy of QSOs - part #3 Pierre Ferruit (European Space Agency - ESTEC) MIRI
NIRSpec
1220 NIRSpec IFS of BR1202 Pierre Ferruit (European Space Agency - ESTEC) NIRSpec
1222 Cosmic Re-ionization, Metal Enrichment, and Host Galaxies from Quasar Spectroscopy Chris Willott (Dominion Astrophysical Observatory) NIRSpec
1243 Exploring the End of Cosmic Reionization Simon Lilly (Eidgenossiche Technische Hochschule (ETH)) NIRCam
1264 NIRSpec and MIRI IFS of SMGs Luis Colina Robledo (Centro de Astrobiologia (CSIC/INTA) Inst. Nac. de Tec. Aero.) MIRI
NIRSpec

 

Deep Fields

ID Program Title Principal Investigator Instrument
1180 NIRCam-NIRSpec Galaxy Assembly Survey - GOODS-S - Part #1 Daniel Eisenstein (Harvard University) NIRCam
NIRSpec
1181 NIRCam-NIRSpec Galaxy Assembly Survey - GOODS-N Daniel Eisenstein (Harvard University) NIRCam
NIRSpec
1204 Are There AGN Embedded in All Ultraluminous Infrared Galaxies (ULIRGs)? George Rieke (University of Arizona) MIRI
1207 MIRI in the Hubble Ultra-Deep Field George Rieke (University of Arizona) MIRI
NIRSpec
1210 NIRCam-NIRSpec Galaxy Assembly Survey - GOODS-S - Part #1 Pierre Ferruit (European Space Agency - ESTEC) NIRSpec
1211 NIRSpec WIDE MOS Survey - GOODS-N Pierre Ferruit (European Space Agency - ESTEC) NIRSpec
1213 WIDE MOS Survey - AEGIS Pierre Ferruit (European Space Agency - ESTEC) NIRSpec
1214 NIRSpec WIDE MOS Survey - COSMOS Pierre Ferruit (European Space Agency - ESTEC) NIRSpec
1215 NIRSpec WIDE MOS Survey - UDS Pierre Ferruit (European Space Agency - ESTEC) NIRSpec
1216 Integral Field Spectroscopy in GOODS-S Pierre Ferruit (European Space Agency - ESTEC) NIRSpec
1217 Integral Field Spectroscopy in COSMOS Pierre Ferruit (European Space Agency - ESTEC) NIRSpec
1262 Integral Field Spectroscopy in EGS Pierre Ferruit (European Space Agency - ESTEC) MIRI
NIRSpec
1263 NIRSpec and MIRI Spectroscopy of QSOs - Part 2 Luis Colina Robledo (Centro de Astrobiologia (CSIC/INTA) Inst. Nac. de Tec. Aero.) MIRI
NIRSpec
1283 The MIRI HUDF Deep Imaging Survey H.U. Norgaard-Nielsen (Danish Space Research Institute) MIRI
1284 MIRI IFS of COS-zs7-1 Luis Colina Robledo (Centro de Astrobiologia (CSIC/INTA) Inst. Nac. de Tec. Aero.) MIRI
1286 NIRCam-NIRSpec Galaxy Assembly Survey - GOODS-S - Part #2 Pierre Ferruit (European Space Agency - ESTEC) NIRSpec
1287 NIRCam-NIRSpec Galaxy Assembly Survey - GOODS-S - Part #3 Pierre Ferruit (European Space Agency - ESTEC) NIRSpec