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 |
|
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.
| ID | Program Title | AR? | Principal Investigator | Instrument |
|---|---|---|---|---|
| 1189 | NIRCam Y-Dwarfs | Thomas Roellig | MIRI NIRCam NIRISS NIRSpec |
|
| 1202 | The NIRISS Survey for Young Brown Dwarfs and Rogue Planets | Aleks Scholz | NIRISS | |
| 1209 | Probing the Cloud Properties of SIMP0136+0933 | Etienne Artigau | NIRISS | |
| 1228 | The Physics of Brown Dwarfs - Part #1 | Catarina Alves de Oliveira | NIRSpec | |
| 1229 | The Physics of Brown Dwarfs - Part #2 | Catarina Alves de Oliveira | NIRCam NIRSpec |
|
| 1230 | The Physics of Brown Dwarfs - Part #3 | Catarina Alves de Oliveira | MIRI NIRCam NIRISS NIRSpec |
|
| 1256 | Brown Dwarfs and Free-floating Planetary Mass Objects in Orion: Imaging | Mark McCaughrean | NIRCam | |
| 1413 | MIRI Coronagraphy of the Cold Substellar Companion GJ 758 B | Laurent Pueyo | MIRI | |
| 1414 | Integral Field Spectroscopy of the Benchmark Substellar Companion HD 19467 B | Marshall Perrin | NIRSpec |
| ID | Program Title | AR? | Principal Investigator | Instrument |
|---|---|---|---|---|
| 1183 | Coronagraphic Imaging of Scattered light Debris Disks | Andras Gaspar | NIRCam NIRSpec |
|
| 1192 | Physics and Chemistry of PDR Fronts | Karl Misselt |
MIRI |
|
| 1206 | Extreme Debris Disks and Disk Variability | George Rieke | MIRI | |
| 1282 | MIRI EC Protoplanetary and Debris Disks Survey | Thomas Henning | MIRI NIRSpec |
|
| 1294 | Thermal Emission Spectroscopy of Beta Pictoris' Prototypical Debris Disk | Christine Chen | MIRI | |
| 1411 | Coronagraphy of the Debris Disk Archetype Beta Pictoris | Christopher Stark | MIRI NIRCam |
| ID | Program Title | AR? | Principal Investigator | Instrument |
|---|---|---|---|---|
| 1180 | NIRCam-NIRSpec Galaxy Assembly Survey - GOODS-S - Part #1 | Daniel Eisenstein | NIRCam NIRSpec |
|
| 1181 | NIRCam-NIRSpec Galaxy Assembly Survey - GOODS-N | Daniel Eisenstein | NIRCam NIRSpec |
|
| 1207 | MIRI in the Hubble Ultra-Deep Field | George Rieke | MIRI NIRSpec |
|
| 1210 | NIRCam-NIRSpec Galaxy Assembly Survey - GOODS-S - Part #1 | Pierre Ferruit | NIRSpec | |
| 1211 | NIRSpec WIDE MOS Survey - GOODS-N | Pierre Ferruit | NIRSpec | |
| 1213 | WIDE MOS Survey - AEGIS | Pierre Ferruit | NIRSpec | |
| 1214 | NIRSpec WIDE MOS Survey - COSMOS | Pierre Ferruit | NIRSpec | |
| 1215 | NIRSpec WIDE MOS Survey - UDS | Pierre Ferruit | NIRSpec | |
| 1216 | Integral Field Spectroscopy in GOODS-S | Pierre Ferruit | NIRSpec | |
| 1217 | Integral Field Spectroscopy in COSMOS | Pierre Ferruit | NIRSpec | |
| 1262 | Integral Field Spectroscopy in EGS | Pierre Ferruit | MIRI NIRSpec |
|
| 1263 | NIRSpec and MIRI Spectroscopy of QSOs - Part 2 | Luis Colina Robledo | MIRI NIRSpec |
|
| 1283 | The MIRI HUDF Deep Imaging Survey | H.U. Norgaard-Nielsen | MIRI | |
| 1284 | MIRI IFS of COS-zs7-1 | Luis Colina Robledo | MIRI | |
| 1286 | NIRCam-NIRSpec Galaxy Assembly Survey - GOODS-S - Part #2 | Pierre Ferruit | NIRSpec | |
| 1287 | NIRCam-NIRSpec Galaxy Assembly Survey - GOODS-S - Part #3 | Pierre Ferruit | NIRSpec |
| ID | Program Title | AR? | Principal Investigator | Instrument |
|---|---|---|---|---|
| 1177 | MIRI Observations of Transiting Exoplanets | Thomas Greene | MIRI | |
| 1184 | Survey of Nearby Young M Stars | Joshua Schlieder | NIRCam | |
| 1185 | Transit Spectroscopy of Mature Planets | Thomas Greene | NIRCam | |
| 1188 | Direct Spectroscopy of Non-transiting Exoplanets | Klaus Hodapp | MIRI NIRSpec |
|
| 1193 | Coronagraphic Imaging of Young Planets and Debris Disk with NIRCam and MIRI | Charles Beichman | MIRI NIRCam |
|
| 1194 | Characterization of the HR 8799 Planetary System and Planet Search | Charles Beichman | MIRI NIRCam |
|
| 1195 | Coronagraphic Imaging of Young Planets - Part 3 | Charles Beichman | NIRCam | |
| 1200 | Architecture of Directly-imaged Extrasolar Planetary Systems | Julien Rameau | NIRISS | |
| 1201 | NIRISS Exploration of the Atmospheric Diversity of Transiting Exoplanets (NEAT) | David Lafreniere | NIRISS NIRSpec |
|
| 1224 | Transiting Exoplanet Characterization with JWST/NIRSPEC | Stephan Birkmann | NIRSpec | |
| 1241 | MIRI Coronagraphic Imaging of Exoplanets | Michael Ressler | MIRI | |
| 1270 | Characterizing the TWA 27 System | Stephan Birkmann | MIRI NIRSpec |
|
| 1274 | Extrasolar Planet Science with JWST | Jonathan Lunine | NIRCam | |
| 1275 | Spectroscopic Characterization of PSO J318 | Pierre-Olivier Lagage | MIRI NIRSpec |
|
| 1276 | Spectroscopic Observations of WD 0806-661B | Pierre-Olivier Lagage | MIRI NIRCam NIRSpec |
|
| 1277 | Coronographic Observations of Young Exoplanets and Spectroscopic Observations of ROSS 458 ABc | Pierre-Olivier Lagage | MIRI NIRSpec |
|
| 1278 | MIRI Spectroscopic Observations of Brown Dwarfs | Pierre-Olivier Lagage | MIRI | |
| 1279 | Thermal Emission from Trappist1-b | Pierre-Olivier Lagage | MIRI | |
| 1280 | MIRI Transiting Observation of WASP-107b | Pierre-Olivier Lagage | MIRI | |
| 1281 | MIRI and NIRSPEC Transit Observations of HAT-P-12 b | Pierre-Olivier Lagage | MIRI NIRSpec |
|
| 1292 | ROSS 458 ABc | Jonathan Lunine | NIRSpec | |
| 1312 | Transit and Eclipse Spectropscopy of a Warm Neptune | Nikole Lewis | MIRI NIRISS NIRSpec |
|
| 1331 | Transit Spectroscopy of TRAPPIST-1e | Nikole Lewis | NIRSpec | |
| 1353 | Transit and Eclipse Spectropscopy of a Hot Jupiter | Nikole Lewis | MIRI NIRISS NIRSpec |
|
| 1412 | Characterizing 51 Eridani Exoplanetary System | Marshall Perrin | NIRCam |
| ID | Program Title | AR? | Principal Investigator | Instrument |
|---|---|---|---|---|
| 1198 | IFU Spectroscopy of the Host Galaxies of Strongly Lensed Quasars | Massimo Stiavelli | NIRCam NIRSpec |
|
| 1205 | Formation Histories and Stellar Masses of Very High-z Quasars | George Rieke | NIRCam NIRSpec |
|
| 1218 | NIRSpec-IFU Observations of Two QSOs at z=6 | Pierre Ferruit | NIRSpec | |
| 1219 | NIRSpec and MIRI spectroscopy of QSOs - part #3 | Pierre Ferruit | MIRI NIRSpec |
|
| 1220 | NIRSpec IFS of BR1202 | Pierre Ferruit | NIRSpec | |
| 1222 | Cosmic Re-ionization, Metal Enrichment, and Host Galaxies from Quasar Spectroscopy | Chris Willott | NIRSpec | |
| 1243 | Exploring the End of Cosmic Reionization | Simon Lilly | NIRCam | |
| 1264 | NIRSpec and MIRI IFS of SMGs | Luis Colina Robledo | MIRI NIRSpec |
| ID | Program Title | AR? | Principal Investigator | Instrument |
|---|---|---|---|---|
| 1179 | YSO Imaging | Jarron Leisenring | NIRCam | |
| 1186 | Protostar (YSO) Spectroscopy | Thomas Greene | NIRSpec | |
| 1187 | Extinction Mapping of Pre-stellar Cores | Klaus Hodapp | NIRCam | |
| 1235 | LMC-N79: Study of Most Massive Young Stellar Object Star Forming Region |
|
Margaret Meixner | MIRI NIRCam |
| 1236 | Protostellar Binaries in Perseus | Michael Ressler | MIRI | |
| 1257 | The Young Protostellar Outflow HH211as | Thomas Ray | MIRI NIRCam NIRSpec |
|
| 1258 | Structure, Excitation, and Proper Motions in the Symmetric HH212 Jet | Mark McCaughrean | NIRCam | |
| 1282 | MIRI EC Protoplanetary and Debris Disks Survey | Thomas Henning | MIRI NIRSpec |
|
| 1290 | MIRI EC Protostars Survey | Ewine Van Dishoeck | MIRI NIRSpec |
|
| 1293 | Collimation Zone in Protostellar Jets, the Final Frontier. MIRI MRS and Imager Simultaneous Observations | Alberto Noriega-Crespo | MIRI |
| ID | Program Title | AR? | Principal Investigator | Instrument |
|---|---|---|---|---|
| 1191 | Kuiper Belt Science with JWST | John Stansberry | MIRI NIRSpec |
|
| 1231 | Surface Composition of Mid-sized TNOs: Searching for Ammonia | Aurelie Guilbert-Lepoutre | NIRSpec | |
| 1244 | Large Asteroids and Trojan Asteroids |
|
Andrew Rivkin | MIRI NIRCam NIRSpec |
| 1245 | Near-Earth Objects |
|
Cristina Thomas | MIRI NIRCam NIRSpec |
| 1246 | Jupiter's Great Red Spot |
|
Leigh Fletcher | MIRI |
| 1247 | Saturn |
|
Leigh Fletcher | MIRI NIRCam NIRSpec |
| 1248 | Uranus |
|
Leigh Fletcher | MIRI NIRSpec |
| 1249 | Neptune |
|
Leigh Fletcher | MIRI |
| 1250 | Probing the Sub-surface Oceans of Europa and Enceladus with JWST |
|
Geronimo Villanueva | MIRI NIRCam NIRSpec |
| 1251 | Titan Climate, Composition and Clouds |
|
Conor Nixon | MIRI NIRCam NIRSpec |
| 1252 | Spectral Mapping of a Comet's Inner Coma |
|
Michael Kelley | MIRI NIRCam NIRSpec |
| 1253 | ToO Comet |
|
Stefanie Milam | NIRSpec |
| 1254 | TNOs | Alex Parker | MIRI NIRSpec |
|
| 1255 | JWST Medium-Deep Fields -- Hammel IDS GTO Program |
|
Stefanie Milam | NIRCam |
| 1271 | ToO TNOs: 'Unveiling the Kuiper Belt by Stellar Occultations' | Pablo Santos-Sanz | NIRCam | |
| 1272 | Kuiper Belt Science with JWST | Dean Hines | MIRI NIRSpec |
|
| 1273 | Kuiper Belt Science with JWST | Jonathan Lunine | MIRI NIRSpec |
|
| 1415 | Mars |
|
Geronimo Villanueva | NIRCam NIRSpec |
| ID | Program Title | AR? | Principal Investigator | Instrument |
|---|---|---|---|---|
| 1182 | NIRCam GTO - IRDC Mapping | Erick Young | NIRCam | |
| 1190 | Embedded Cluster Survey | Michael Meyer | NIRCam | |
| 1232 | SN 1987A: The Formation and Evolution of Dust in a Supernova Explosion |
|
Gillian Wright | MIRI NIRSpec |
| 1237 | Star Formation in the Extreme Outer Galaxy | Michael Ressler | MIRI | |
| 1238 | Sparse Spectral Mapping of NGC 1514 | Michael Ressler | MIRI | |
| 1239 | Investigating Dusty Disks in Evolved Stars | Michael Ressler | MIRI | |
| 1240 | De-mystifying SPRITES with JWST | Michael Ressler | MIRI NIRSpec |
|
| 1242 | Planets in Formation and Exozodiacal Disks | Doug Johnstone | NIRISS | |
| 1306 | Galactic Center Astrometry |
|
Roeland van der Marel | NIRCam |
| ID | Program Title | AR? | Principal Investigator | Instrument |
|---|---|---|---|---|
| 1176 | JWST Medium-Deep Fields -- Windhorst IDS GTO Program |
|
Rogier Windhorst | NIRCam NIRSpec |
| 1178 | Ram Pressure Stripping in ESO 137-001 | Scott Friedman | MIRI | |
| 1204 | Are There AGN Embedded in All Ultraluminous Infrared Galaxies (ULIRGs)? | George Rieke | MIRI | |
| 1223 | NIRSpec GTO observations of NGC 4654 | Torsten Boeker | NIRSpec | |
| 1225 | Star Formation in the Local Grouroup - NGC 3603 | Guido De Marchi | NIRSpec | |
| 1226 | Star Formation in the Local Group - NGC 2070 (30 Dor) | Guido De Marchi | NIRSpec | |
| 1227 | NGC 346: Star Formation at Low Metallicity in the Small Magellanic Cloud |
|
Margaret Meixner | MIRI NIRCam NIRSpec |
| 1233 | I Zw 18: Dust Life Cycle at Very Low Metallicity |
|
Margaret Meixner | MIRI NIRCam |
| 1234 | NGC 6822: Dust Life Cycle Study of a Nearby Low Metallicity Galaxy |
|
Margaret Meixner | MIRI NIRCam |
| 1260 | NGC 1068 as Proving Ground for NIRISS AMI |
|
K. E. Saavik Ford | NIRISS |
| 1265 | NGC 6240 | Almudena Alonso-Herrero | MIRI NIRSpec |
|
| 1266 | NIRSpec & MIRI Integral-Field Spectroscopy of the Galactic Center | Macarena Garcia Marin | MIRI NIRSpec |
|
| 1267 | NIRSpec+MIRI IFU Observations of Arp220 | Daniel Dicken | MIRI NIRSpec |
|
| 1268 | NIRSpec & MIRI Integral-Field Spectroscopy of the Nucleus of Mrk 231 | Roberto Maiolino | MIRI NIRSpec |
|
| 1269 | NIRSpec Observations of Centaurus-A: A GTO Program Proposal | Nora Luetzgendorf | MIRI NIRSpec |
|
| 1304 | Internal Dynamics of Milky Way Dwarf Spheroidal Galaxies | Roeland van der Marel | NIRCam | |
| 1305 | Dynamics of the Andromeda Galaxy Satellite System | Roeland van der Marel | NIRCam |
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