Cycle 1 GO

General Observer Programs in Cycle 1

The Cycle 1 General Observers (GO) program provides the worldwide astronomical community with the first extensive opportunity to make observations with JWST. Approximately 6,000 hours were awarded to observing programs using the full suite of JWST instrumentation. Scientists also proposed for archival analysis of data from DD ERS programs and public GTO programs, theoretical investigations, and the development of software tools relevant to JWST observations. Science observations will begin following a 6-month commissioning period after launch.

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

Small programs: ≤ 25 hours
Medium programs: > 25 and ≤ 75 hours
Large programs: >75 hours

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.

ID	Program Title	PI & Co-PIs	Exclusive Access Period (months)	Prime/ Parallel Time (hours)	Instrument/ Mode	Type
1549	The Deepest Search for Rare Molecules and Isotopologues in Planet-forming Disks	PI: Klaus Pontoppidan	0	13.4	MIRI/MRS	GO
1556	A Time Series Calibration of Medium Resolution Spectroscopy with MIRI	PI: Drake Deming	0	12.8	MIRI/MRS	GO, Calibration
1563	Icy Kuiper Belts in Exoplanetary Systems	PI: Christine Chen	12	34.9	NIRSpec/IFU NIRCam/Coronagraphy	GO
1584	A DSHARP-MIRI Treasury Survey of Chemistry in Planet-forming Regions	PI: Colette Salyk Co-PI: Klaus Pontoppidan	0	27.7	MIRI/MRS	GO, Treasury
1618	Searching Our Closest Stellar Neighbor for Planets and Zodiacal Emission	PI: Charles Beichman Co-PI: Dimitri Mawet	12	25	MIRI/Coronagraphy	GO
1633	A Deep Molecular Survey of HD 189733b	PI: Drake Deming	12	39	MIRI/MRS NIRCam/GTS	GO
1640	The Infrared Water Spectrum as a Tracer of Pebble Delivery to Rocky Planets	PI: Andrea Banzatti	0	19.1	MIRI/MRS	GO
1647	Caught in the Act: A Debris Disc in Outburst	PI: Andrew Swan	12	16.7	NIRSpec/BOTS MIRI/MRS	GO
1668	Searching for Low Mass Planets in Debris Disk Gaps	PI: Sebastian Marino	12	11.1	MIRI/Coronagraphy	GO
1676	EUV vs. X-ray Photoevaporation of Protoplanetary Disks	PI: Catherine Espaillat	12	7.7	MIRI/MRS	GO
1729	A NIRSpec Phase Curve for the Ultrahot Jupiter WASP-121b	PI: Thomas Mikal-Evans Co-PI: Tiffany Kataria	12	44.7	NIRSpec/BOTS	GO
1743	Constraining the Atmosphere of the Terrestrial Exoplanet Gl486b	PI: Megan Mansfield	12	12.6	MIRI/LRS	GO
1751	Mapping Inclined Disk Astrochemical Signatures (MIDAS)	PI: Melissa McClure	12	24.9	NIRSpec/IFU MIRI/MRS	GO
1759	Physics and Chemistry of Planet-Forming Disks in Extreme Radiation Environments	PI: Maria Claudia Ramirez-Tannus	12	24.3	MIRI/MRS	GO
1803	Unlocking the Mysteries of the Archetype Sub-Neptune GJ1214b with a Full-Orbit Phase Curve	PI: Jacob Bean Co-PI: Eliza Kempton	12	48.7	MIRI/LRS	GO
1843	Cloud Composition and Origin of the Reddest Known Sub-stellar Companion HD 206893 B	PI: Jens Kammerer Co-PI: Tomas Stolker	12	2.5	NIRISS/AMI	GO
1846	A Search for Signatures of Volcanism and Geodynamics on the Hot Rocky Exoplanet LHS 3844b	PI: Laura Kreidberg	12	11.7	MIRI/LRS	GO
1902	High Resolution, High Contrast Kernel Phase Imaging with NIRCam	PI: Jens Kammerer Co-PIs: Laurent Pueyo and Anand Sivaramakrishnan	12	4.3	NIRCam/Imaging	GO, Calibration
1911	A Search for the Giant Planets that Drive White Dwarf Accretion	PI: Susan Mullally Co-PI: Fergal Mullally	12	24.6	MIRI/Imaging	GO
1935	Unshrouding the Sub-Neptune Population: The Case of TOI-421b	PI: Eliza Kempton	12	10.9	NIRISS/SOSS NIRSpec/BOTS	GO
1952	Determining the Atmospheric Composition of the Super-Earth 55 Cancri e	PI: Renyu Hu	12	15.4	NIRCam/GTS MIRI/LRS	GO
1958	Spectroscopy of the Circumplanetary Disk around the Young Planet-mass Companion CT Cha b	PI: Christian Rab Co-PIs: Inga Kamp, Rens Waters, and Michael Migo Mueller	12	4.5	MIRI/MRS	GO
1977	Glows in the Dark: New Models for the Atmospheric Structure and Evolution of High Metallicity and Low Mass Giant Planets	PI: Mark Marley				AR
1981	Tell Me How I’m Supposed To Breathe With No Air: Measuring the Prevalence and Diversity of M-Dwarf Planet Atmospheres	PI: Kevin Stevenson Co-PIs: Jacob Lustig-Yaeger	0	75.6	NIRSpec/BOTS NIRCam/GTS	GO
2001	Mineral Clouds in the Atmosphere of the Hot Jupiter HD189733b	PI: Michiel Min	12	6.4	MIRI/LRS	GO
2008	A Blast From the Past: A Spectroscopic Look at the Flash Heating of HD80606b	PI: Tiffany Kataria Co-PIs: Nikole Lewis and Laura Mayorga	12	24.2	MIRI/LRS	GO
2021	Into the Next Dimension: 3-D Eclipse Maps of the Canonical Hot Jupiter HD 189733b	PI: Brian Kilpatrick Co-PI: Tiffany Kataria	12	12.4	MIRI/LRS	GO
2025	The Chemistry of Planet Formation: A JWST-ALMA Survey of 4 Planet-Forming Disks	PI: Karin Oberg	12	12.8	MIRI/MRS	GO
2044	Direct Imaging Spectroscopy of Two Jovian Exoplanets: Characterization of the TYC 8998-760-1 Multi-Planetary System	PI: Kielan Wilcomb Co-PIs: Marshall Perrin and Quinn Konopacky	12	5.2	NIRSpec/IFU MIRI/LRS	GO
2053	Search for NIR Gas in Debris Disks. Is There a Water Delivery Mechanism?	PI: Isabel Rebollido	12	5.9	NIRSpec/FS	GO
2055	Tracing Hot Jupiter Formation and Migration with Volatile and Refractory Element Ratios	PI: Joshua Lothringer	12	9.1	NIRSpec/BOTS	GO
2062	Transmission Spectroscopy of the Super-Neptune WASP-166b	PI: Andrew Mayo Co-PI: Courtney Dressing	12	22.8	NIRISS/SOSS NIRSpec/BOTS	GO
2084	Is It Raining Lava in the Evening on 55 Cancri e?	PI: Alexis Brandeker	12	25	NIRCam/GTS	GO
2113	Exploring the Morning and Evening Limbs of a Transiting Exoplanet	PI: Nestor Espinoza	12	15.6	NIRISS/SOSS	GO
2149	The Nature, Origin, and Fate of Two Planets of a Newborn System through the Lens of their Relative Atmospheric Properties	PI: Jean-Michel Desert	12	24.6	NIRSpec/BOTS	GO
2153	Detecting a Young 2 Jupiter Mass Planet Embedded in the Disk of HD 163296	PI: Gabriele Cugno Co-PI: Richard Teague	12	7.8	MIRI/Coronagraphy	GO
2158	From East to West: The First Simultaneous Temperature and Cloud Map of a Hot Jupiter	PI: Vivien Parmentier	12	25	NIRSpec/BOTS	GO
2159	The First Near-infrared Spectroscopic Phase-curve of a Super-Earth	PI: Nestor Espinoza	12	14.9	NIRSpec/BOTS	GO
2232	Precision Tests of the Physics of Mixing in Cool Planetary and Brown Dwarf Atmospheres	PI: Jonathan Fortney				AR
2243	A Direct Detection of the Closest Jupiter Analog with JWST/MIRI	PI: Elisabeth Matthews	12	13.8	MIRI/Coronagraphy	GO
2260	Caught in the Act of Dispersing their Disks? MIRI MRS Can Tell	PI: Ilaria Pascucci	12	18	MIRI/MRS	GO
2278	Illuminating Ice: A 3D View of Water Ice during Planet Formation	PI: Ilse Cleeves	12	16.2	NIRCam/Coronagraphy	GO
2297	Unveiling Formation Signatures in the Atmosphere of beta Pictoris c	PI: Tomas Stolker	12	5.1	NIRISS/AMI	GO
2304	Hot Take on a Cool World: Does Trappist-1c Have an Atmosphere?	PI: Laura Kreidberg	12	17.9	MIRI/Imaging	GO
2311	JWST MIRI Imaging Survey of Planetary-mass Companions: Testing the Compact Disk Hypothesis	PI: Ya-Lin Wu Co-PI: Brendan Bowler	12	16.2	MIRI/Imaging	GO
2319	TOI-178: The Best Laboratory for Testing Planetary Formation Theories	PI: Matthew Hooton	12	24.9	NIRSpec/BOTS	GO
2334	Exploring the Nature of a Temperate Exoplanet in the Fulton Gap	PI: Mario Damiano	12	14.4	NIRSpec/BOTS	GO
2347	A Hell of a Phase Curve: Mapping the Surface and Atmosphere of a Lava Planet K2-141b	PI: Lisa Dang	12	24.9	MIRI/LRS	GO
2358	Under the Light of a Dead Star: Revealing the Atmospheric Composition of a White Dwarf Planet	PI: Ryan MacDonald	12	13.3	NIRSpec/BOTS	GO
2372	Deep Characterization of the Atmosphere of a Temperate Sub-Neptune	PI: Renyu Hu	12	67.9	NIRSpec/BOTS	GO
2420	Probing the Terrestrial Planet TRAPPIST-1c for the Presence of an Atmosphere	PI: Alexander Rathcke	0	24.9	NIRSpec/BOTS	GO
2437	Diamonds are Forever: Probing the Carbon Budget and Formation History of the Ultra-Puffy Hot Jupiter WASP-127b	PI: Stefan Pelletier Co-PIs: Bjorn Benneke and Romain Allart	12	13.1	NIRSpec/BOTS	GO
2454	Unveiling the Nature of the Impossible Planets	PI: Peter Gao	12	14.9	NIRSpec/BOTS	GO
2487	Detecting a Wide-Separation Gas Giant in AS 209	PI: Stefano Facchini	12	4.6	NIRCam/Imaging	GO
2488	Real Time Exoplanet Meteorology: Direct Measurement of Cloud Dynamics on the High-Eccentricity Hot Jupiter HD80606 b	PI: James Sikora	12	25	NIRSpec/BOTS	GO
2498	The Atmosphere of a 17Myr Old Hot Jupiter	PI: Andrew Mann	12	8.9	NIRSpec/BOTS	GO
2507	Thermal Emission from the First Planet Transiting a White Dwarf	PI: Andrew Vanderburg	12	3	NIRSpec/BOTS	GO
2508	The First and Only Multi-wavelength Map of an Ultra-short-period Sub-Earth	PI: Michael Zhang	12	13.2	MIRI/LRS	GO
2509	Kernel-Phase Detection Limits for Planet Discovery with JWST	PI: Samuel Factor				AR
2512	Seeing the Forest and the Trees: Unveiling Small Planet Atmospheres with a Population-Level Framework	PI: Natasha Batalha Co-PI: Johanna Teske	0	141.6	NIRSpec/BOTS	GO
2538	Using JWST to Search for Planetary Sculptors in an ALMA-Selected Sample of Debris Disks	PI: Sasha Hinkley	12	23.5	MIRI/Coronagraphy	GO
2540	Investigating the Disk-Planet Interaction in the HD 163296 System with JWST	PI: Luca Ricci	12	15.6	NIRCam/Coronagraphy	GO
2562	Dust Settling and Grain Evolution in Edge-on Protoplanetary Disks	PI: Francois Menard Co-PI: Karl Stapelfeldt	12	10.8	NIRCam/Imaging MIRI/Imaging	GO
2571	Unveiling the Atmospheric Composition and Haze Formation Rates in the Young, Cool, Super-Puff Kepler-51d	PI: Jessica Libby-Roberts Co-PI: Zach Berta-Thompson	12	20.5	NIRSpec/BOTS	GO
2589	Atmospheric Reconnaissance of the TRAPPIST-1 Planets	PI: Olivia Lim	0	53.7	NIRISS/SOSS NIRSpec/BOTS	GO
2594	The Twin Paradox: Assessing Planetary Radius Evolution with a CH4 Thermometer	PI: Jessica Spake Co-PI: Zafar Rustamkulov	12	16.6	NIRSpec/BOTS NIRISS/SOSS	GO
2627	Demonstrating a Model-based Coronagraphic Phase Retrieval for Processing of High-Contrast-Imaging Observations with the James Webb Space Telescope	PI: Marie Ygouf	12	9.9	Wfsc Fine Phasing NIRCam/Coronagraphy NIRCam/Engineering Imaging	GO, Calibration
2667	Good Vibrations: Directly Measuring Exoplanet Aerosol Compositions with MIRI Spectroscopy	PI: Hannah Wakeford	12	9.2	MIRI/LRS	GO
2708	The Thermal Emission Spectrum of the Closest M Dwarf Transiting Rocky Planet	PI: Zach Berta-Thompson	12	17.8	MIRI/LRS	GO
2722	Chemical Disequilibrium in a Temperate Sub-Neptune	PI: Nikku Madhusudhan	12	20.4	NIRSpec/BOTS MIRI/LRS NIRISS/SOSS	GO

ID	Program Title	PI & Co-PIs	Exclusive Access Period (months)	Prime/ Parallel Time (hours)	Instrument/ Mode	Type
1433	Physical Properties of the Triply-Lensed z = 11 Galaxy	PI: Dan Coe	0	11.3	NIRCam/Imaging NIRSpec/MOS	GO
1567	Early Galaxy Assembly Uncovered with ALMA and JWST: A Remarkably UV and [CII] Bright, Strongly Lensed Sub-L* Galaxy at z=6.072	PI: Seiji Fujimoto	12	12.3	NIRCam/Imaging NIRSpec/IFU	GO
1571	PASSAGE– Parallel Application of Slitless Spectroscopy to Analyze Galaxy Evolution	PI: Matthew Malkan	0	0/591	NIRISS/WFSS	GO, Pure Parallel
1572	Mapping, Resolving and Penetrating into the Dusty Spiderweb Protocluster with Unique Pa-beta Imaging	PI: Helmut Dannerbauer Co-PI: Yusei Koyama	12	3.6	NIRCam/Imaging	GO
1626	Achieving a Revolutionary Panchromatic View of Early Galaxy Growth through NIRSpec/IFU Observations of 12 Massive z>6.5 Galaxies with ALMA-derived [CII] Redshifts	PI: Mauro Stefanon	12	14.1	NIRSpec/IFU	GO
1635	Galaxy Protoclusters as Drivers of Cosmic Reionization	PI: Crystal Martin	12	35.2/9.7	NIRCam/Imaging NIRSpec/MOS	GO
1657	Anchoring z>6 Galaxy Metallicities Using T_e and n_e Diagnostics Enabled by JWST and ALMA Spectroscopy	PI: Yuichi Harikane Co-PI: Ryan Sanders	12	23.7	NIRSpec/IFU MIRI/MRS NIRCam/Imaging	GO
1671	Emission Line Galaxies Beyond the Limits of the Hubble UDF: Physical Conditions in Ultra-faint Star Forming Galaxies	PI: Michael Maseda	12	23.9	NIRSpec/MOS	GO
1701	Dissecting the Prototypical Starbursts NGC 253 and M 82 and Their Cool Galactic Winds	PI: Alberto Bolatto	12	42.8	MIRI/Imaging MIRI/MRS NIRCam/Imaging	GO
1712	JWST Beholds the Multiple-merger Assembly of the Most Luminous Quasar	PI: Tanio Diaz-Santos	12	23.3	MIRI/MRS NIRSpec/IFU	GO
1721	Probing the Interstellar Medium of Galaxies in the Early Universe	PI: Jeyhan Kartaltepe				AR
1740	H-drop Galaxies: "Rosetta Stones'' at z~13 for Galaxy Formation Studies	PI: Yuichi Harikane	12	6.6	NIRSpec/FS	GO
1747	Linking Bright Galaxy Properties to IGM Opacity and Environment in the Early Epoch of Reionization with NIRSpec	PI: Guido Roberts-Borsani	6	25.1	NIRSpec/MOS	GO
1758	Confirming a Potential Ultra-Massive Galaxy at z=10.57	PI: Steven Finkelstein	12	2.6	NIRSpec/FS	GO
1762	Halfway to the Peak: A Bridge Program To Map Coeval Star Formation and Supermassive Black Hole Growth	PI: Alexandra Pope Co-PIs: Anna Sajina and Lin Yan	12	24.6	MIRI/MRS	GO
1783	JWST probes Feedback in Emerging extrAgalactic Star clusTers: JWST-FEAST	PI: Angela Adamo	12	45	NIRCam/Imaging MIRI/Imaging	GO
1791	The Early Assembly History of the Most Massive Halo in the Reionization Era	PI: Justin Spilker	12	6.1	NIRCam/Imaging MIRI/Imaging	GO
1810	The Stellar and Gas Content of Galaxies at Cosmic Noon	PI: Sirio Belli	12	46/35.7	NIRSpec/MOS	GO
1827	NIRSpec Integral Field Spectroscopy of LyC-Leaking Galaxies	PI: Koki Kakiichi	12	24.1	NIRSpec/IFU	GO
1837	PRIMER: Public Release IMaging for Extragalactic Research	PI: James Dunlop	0	187.2/94.97	MIRI/Imaging	GO, Treasury
1840	ALMA [OIII]88um Emitters. Signpost of Early Stellar Buildup and Reionization in the Universe	PI: Javier Alvarez-Marquez Co-PI: Takuya Hashimoto	12	33.9	NIRSpec/IFU NIRCam/Imaging	GO
1864	The Formation of a Primeval Hyperstarburst Galaxy at z~6	PI: Kedar Phadke	12	18.9	NIRCam/Imaging MIRI/Imaging NIRSpec/IFU MIRI/MRS	GO
1865	Witnessing the Circumgalactic Medium in Formation: The Warm Dust and Molecular Gas in a Record-Breaking Galactic Wind	PI: Sylvain Veilleux	12	8.3	MIRI/Imaging NIRCam/Imaging	GO
1869	LyC22 - Deep Spectroscopic Insights on Star-forming Galaxies 2.2 Gyr after the Big Bang	PI: Daniel Schaerer	12	73.5	NIRSpec/MOS	GO
1879	Opening the Era of Direct Metallicity Measurements in High Redshift Galaxies	PI: Mirko Curti	12	54.2	NIRSpec/MOS	GO
1883	A Modern Theory for Strong Line Metallicity Indicators in the Era of JWST	PI: Desika Narayanan				AR
1893	Galaxy Assembly at z > 6: Unraveling the Origin of the Spatial Offset between the UV and FIR Emission	PI: Stefano Carniani	12	21.3	NIRSpec/IFU	GO
1895	FRESCO: The First Reionization Epoch Spectroscopic COmplete Survey	PI: Pascal Oesch	0	53.1	NIRCam/WFSS	GO
1914	The AURORA Survey: First Direct Metallicity Calibrations at High Redshift	PI: Alice Shapley Co-PI: Ryan Sanders	12	63.8	NIRSpec/MOS	GO
1933	Anatomy of an Ionized Bubble at z=6.6: Which Galaxies Reionized the Universe?	PI: Jorryt Matthee Co-PI: Rohan Naidu	12	18.2	NIRCam/WFSS	GO
1963	UDF Medium Band Survey: Using H-alpha Emission To Reconstruct Ly-alpha Escape during the Epoch of Reionization	PI: Christina Williams Co-PIs: Michael Maseda and Sandro Tacchella	0	20.4/15.5	NIRCam/Imaging	GO
1991	Lifting the Veil on the Most Obscured Galaxies in the Universe	PI: George Privon	12	8.5	MIRI/MRS NIRSpec/IFU	GO
2079	The Next Generation Deep Extragalactic Exploratory Public (NGDEEP) Survey: Feedback in Low-Mass Galaxies from Cosmic Dawn to Dusk	PI: Steven Finkelstein Co-PIs: Casey Papovich and Norbert Pirzkal	0	121.7/96.4	NIRISS/WFSS	GO, Treasury
2110	Ultra-deep Continuum Spectroscopy of Quiescent Galaxies at 1.0<z<2.5: Chemical Abundances and Stellar Kinematics	PI: Mariska Kriek Co-PI: Aliza Beverage	0	22.9	NIRSpec/MOS	GO
2123	A Pathfinder for JWST Spectroscopy: Deep High Spectral Resolution Maps of Galaxies over 1<z<6	PI: Susan Kassin	0	74.3	NIRSpec/MOS	GO
2130	Embedded Star Formation in Nearby Galaxies: The Advent of Parsec Scale Studies beyond the Magellanic Clouds	PI: Janice Lee	0	27.9	MIRI/Imaging NIRCam/Imaging	GO
2136	The Emergence of the Modern Hubble Sequence Revealed by JWST Slit-stepping	PI: Tucker Jones	0	31.7	NIRSpec/MOS	GO
2162	Does Turbulence Suppress Star Formation in AGN hosts?	PI: Nicole Nesvadba	12	4.3	NIRSpec/IFU MIRI/MRS	GO
2186	NIRSpec IFU Spectroscopy of the High-density Starburst in Ultra-luminous Infrared Galaxies	PI: Shunsuke Baba	12	6.7	NIRSpec/IFU	GO
2198	Quiescent or Dusty? Unveiling the Nature of Extremely Red Galaxies at z>3	PI: Laia Barrufet Co-PI: Pascal Oesch	12	9.8	NIRCam/Imaging NIRSpec/MOS	GO
2219	Shining Light on the CO-dark H2 Gas in the Heart of M83	PI: Svea Hernandez	12	14.8	MIRI/MRS	GO
2234	The JWST-legacy Narrow-band Survey of H-alpha and [OIII] Emitters in the Epoch of Reionization	PI: Eduardo Banados	12	17.8	NIRCam/Imaging	GO
2279	Where Cosmic Dawn Breaks First: Mapping the Primordial Overdensity Powering a z~9 Ionized Bubble	PI: Rohan Naidu	12	7.1	NIRCam/WFSS	GO
2282	A Strongly Magnified Individual Star and Parsec-Scale Clusters Observed in the First Billion Years at z = 6	PI: Dan Coe	0	13.9	NIRCam/Imaging NIRSpec/MOS	GO
2285	A Massive Quiescent Galaxy at Redshift 4.657	PI: Adam Carnall	12	8	NIRSpec/FS	GO
2301	Unearthing the Fossilized Andromeda Galaxy: A Spectroscopic Pilot Survey of M31 Giants	PI: John Mackereth	12	12.1	NIRSpec/MOS	GO
2321	The First Blind H-alpha Narrow-band Survey of Star-formation at z>6	PI: Philip Best	12	40.5	NIRCam/Imaging	GO
2344	Mapping Emission and Absorption Line Metallicities onto the Same Univeral Scale	PI: Patricia Schady Co-PI: Nial Tanvir	12	24.9	NIRSpec/FS	GO
2345	Resolved Studies of a Unique Lensed Quiescent Galaxy at z=2: Testing Models of Assembly History, Quenching, and IMF Variations	PI: Andrew Newman	12	13.7	NIRSpec/IFU NIRCam/Imaging	GO
2354	Preventing the Slit-Loss Catastrophe Using Flexible, Spatially Resolved Galaxy Models	PI: Joel Leja				AR
2362	Dawn of the Monsters: JWST Characterization of Extremely Massive Galaxies at z~5	PI: Cemile Marsan Co-PI: Adam Muzzin	12	8.6	NIRSpec/FS NIRCam/Imaging	GO
2368	What Lies Beneath: Understanding the Hidden Engines Driving Extreme Outflows and Galaxy Quenching	PI: Christy Tremonti	12	19.8	MIRI/MRS	GO
2391	The Resolved Properties of PAHs at Low Metallicity	PI: Julia Roman-Duval	12	67.3	MIRI/Imaging NIRCam/Imaging	GO
2410	How Efficiently Do Galaxies Produce Ionizing Photons in the Epoch of Reionization?	PI: Ramesh Mainali				AR
2417	Physical Characterization of a Massive Galaxy Protocluster ~1 Billion Years after the Big Bang	PI: Dominik Riechers	12	11	NIRCam/Imaging MIRI/Imaging NIRSpec/IFU NIRSpec/MOS	GO
2424	Revealing the Ionizing Spectrum of Low-Metallicity Galaxies with MIRI	PI: Anne Jaskot	12	24.5	MIRI/MRS	GO
2426	Spectroscopic Confirmation and Characterization of Bright Galaxies at z~9	PI: Micaela Bagley Co-PI: Sofia Rojas	12	18.1	NIRSpec/FS	GO
2439	Resolving the Cooling Flow at the Center of the Phoenix Cluster	PI: Michael McDonald	12	14.2	MIRI/MRS	GO
2452	The Vanishing Act: PAHs and Heavy Element Abundance in M101	PI: JD Smith	12	7	NIRCam/Imaging	GO
2457	Extreme Quasar Feedback at the Peak of the Galaxy Formation Epoch	PI: Andrey Vayner	12	20.9	NIRSpec/IFU	GO
2478	Spectroscopy of Dwarf Galaxies in the Reionization Era: Ionizing Sources and Gas Conditions at Very Low Metallicity	PI: Daniel Stark	12	10	NIRSpec/MOS	GO
2484	JWST Probes Star Formation Efficiency in Giant Molecular Clouds at z=1	PI: Miroslava Dessauges-Zavadsky Co-PI: Johan Richard	12	8.7	NIRSpec/IFU	GO
2511	How Do the Small Survive: PAH’s in Low Metallicity Starburst II Zw 40	PI: Thomas Lai Co-PIs: JD Smith, Adolf Witt, Aditya Togi, Brandon Hensley, and others*	12	4.2	NIRSpec/IFU MIRI/MRS	GO
2514	PANORAMIC – A Pure Parallel Wide Area Legacy Imaging Survey at 1-5 Micron	PI: Christina Williams Co-PI: Pascal Oesch	0	0/150	NIRCam/Imaging	GO, Pure Parallel
2516	Revealing the Hidden Stellar Emission in the Highest-fidelity ALMA-mapped Submillimeter Galaxies	PI: Jacqueline Hodge Co-PI: Elisabete da Cunha	12	14.3	NIRCam/Imaging MIRI/Imaging	GO
2555	How Do Ionizing Photons Escape the Sunburst Arc?	PI: T. Emil Rivera-Thorsen	12	24.2	NIRSpec/IFU NIRCam/Imaging	GO
2561	UNCOVER: Ultra-deep NIRCam and NIRSpec Observations Before the Epoch of Reionization	PI: Ivo Labbe Co-PI: Rachel Bezanson	0	68.2/50.2	NIRCam/Imaging NIRSpec/MOS	GO, Treasury
2565	How Many Quiescent Galaxies Are There at 3<z<4 Really?	PI: Karl Glazebrook Co-PI: Themiya Nanayakkara	12	14.4	NIRSpec/MOS	GO
2566	Characterizing Stellar Mass Assembly and Physical Properties in the Brightest Galaxy in the Redshift>5 Universe	PI: Gourav Khullar	12	19.4	NIRSpec/IFU NIRCam/Imaging	GO
2567	Do Massive Black Holes Come in Small Packages? A Census of Black Holes in Compact Stellar Systems in the Virgo Cluster	PI: Matthew Taylor Co-PI: Patrick Cote	12	41.2	NIRSpec/IFU	GO
2581	Come Out, Come Out, Wherever You Are: Seeking All the Massive Young Clusters Hidden in the Antennae	PI: Rupali Chandar	12	6	NIRCam/Imaging MIRI/Imaging	GO
2593	CECILIA: A Direct-method Metallicity Calibration for Cosmic Noon through the Epoch of Reionization	PI: Allison Strom Co-PI: Gwen Rudie	12	39.2	NIRSpec/MOS	GO
2659	Beasts in the Bubbles: Characterizing ultra-luminous Galaxies at Cosmic Dawn	PI: John Weaver	12	13.6	NIRSpec/IFU	GO
2674	Environmental Effects on Galaxy Evolution in a z=5.2 Proto-cluster	PI: Pablo Arrabal Haro	12	15.2/7.8	NIRSpec/MOS	GO
2687	Leveraging Early Public JWST Data to Measure Luminosity Functions and Rest-UV Slopes from 6<z<12	PI: Micaela Bagley				AR

ID	Program Title	PI & Co-PIs	Exclusive Access Period (months)	Prime/ Parallel Time (hours)	Instrument/ Mode	Type
1835	Unraveling the Knots of Gaseous Cosmic Web Filaments at z~3 through H-alpha Emission Observations	PI: Sebastiano Cantalupo	12	24.4	NIRSpec/MOS	GO
2073	Towards Tomographic Mapping of Reionization Epoch Quasar Light-Echoes with JWST	PI: Joseph Hennawi Co-PI: Frederick Davies	12	24.3/6.3	NIRCam/Imaging NIRSpec/MOS	GO
2180	Structure Formation and Baryonic Cycling in the Edge-on Galaxy NGC891	PI: Ilse De Looze	12	22.7/1.9	NIRCam/Imaging MIRI/MRS MIRI/Imaging	GO

ID	Program Title	PI & Co-PIs	Exclusive Access Period (months)	Prime/ Parallel Time (hours)	Instrument/ Mode	Type
1638	Securing the TRGB Distance Indicator: A Pre-Requisite for a JWST Measurement of H_0	PI: Kristen McQuinn	12	6.8/2	NIRCam/Imaging	GO
1727	COSMOS-Web: The JWST Cosmic Origins Survey	PI: Jeyhan Kartaltepe Co-PI: Caitlin Casey	0	207.8/81.3	NIRCam/Imaging	GO, Treasury
1794	100% Gain in Precision and Accuracy of H0 Measurement from JWST Stellar Kinematics of a Lens Galaxy	PI: Akin Yildirim Co-PIs: Sherry Suyu and Tommaso Treu	12	9.5	NIRSpec/IFU	GO
1871	The First Observations of the Ionizing Luminosity of Galaxies within the Epoch of Reionization	PI: John Chisholm	12	22.2	NIRSpec/MOS	GO
1995	Answering the Most Important Problem in Cosmology Today: Is the Tension in the Hubble Constant Real?	PI: Wendy Freedman Co-PI: Barry Madore	12	25.8/11.2	NIRCam/Imaging	GO
2046	A Definitive Test of the Dark Matter Paradigm on Small Scales	PI: Anna Nierenberg	12	38.4	MIRI/Imaging	GO
2078	A SPectroscopic survey of biased halos In the Reionization Era (ASPIRE): A JWST Quasar Legacy Survey	PI: Feige Wang Co-PIs: Joseph Hennawi and Xiaohui Fan	12	61.5/29.6	NIRCam/WFSS	GO
2134	Absolute Brightness Measurement of the Extragalactic Background Light Using Gallilean Satellites Eclipse Occultations	PI: Kohji Tsumura	12	24.3	NIRCam/Imaging	GO
2608	Revealing the Earliest Reionized Bubbles with JWST	PI: Anson D'Aloisio				AR

ID	Program Title	PI & Co-PIs	Exclusive Access Period (months)	Prime/ Parallel Time (hours)	Instrument/ Mode	Type
1424	Extreme Events on Gas Giants: Impacts and Storm Eruptions	PI: Leigh Fletcher	12	10	MIRI/MRS NIRSpec/IFU	GO, Non-Disruptive ToO
1566	The Coma Dust and Volatiles of C/2017 K2 (Pan-STARRS)	PI: Chick Woodward	12	12.4	MIRI/MRS NIRSpec/IFU NIRCam/Imaging	GO
1568	An Ultra-Sensitive Pencil Beam Search for 10 km Trans-Neptunian Objects	PI: John Stansberry Co-PIs: David Trilling and Wesley Fraser	12	45.1	NIRCam/Imaging	GO
1585	Analysis of GTO Observations of Uranus by the MIRI Instrument	PI: Glenn Orton	12			AR
1598	Analysis of GTO Observations of Neptune by the MIRI Instrument	PI: Glenn Orton	12			AR
1604	Dynamics and Temporal Variability in the Atmosphere of Neptune	PI: Glenn Orton	12	8.3	MIRI/MRS	GO
1658	Pluto's Climate System with JWST	PI: Emmanuel Lellouch	12	23.4	MIRI/MRS MIRI/LRS NIRCam/Imaging MIRI/Imaging	GO
1731	Variability and Abundance of Hydration on M-Type Asteroid (16) Psyche: The Search for Water on the Largest Metallic Asteroid	PI: Stephanie Jarmak	12	8.7	NIRSpec/IFU MIRI/MRS	GO
1786	The Moons of Uranus: A NIRSpec Investigation of Their Origins, Organic Constituents, and Possible Ocean World Activity	PI: Richard Cartwright	12	18.7	NIRSpec/IFU	GO
1897	Pushing the Envelope of the JWST Discovery Space: Measuring the Insoluble Organic Matter (IOM) and Polycyclic Aromatic Hydrocarbon (PAH) Content of Comet 9P/Tempel 1	PI: Nathan Roth	12	5.5	NIRSpec/IFU MIRI/MRS	GO
2037	First Detection of Volatiles from a Main-belt Comet	PI: Michael Kelley	12			AR
2060	Unraveling the Primordial Constituents and Exogenic Processes That Shaped Callisto's Surface	PI: Richard Cartwright	12	3.4	NIRSpec/IFU	GO
2127	Frozen Oort Cloud Comet Hale-Bopp	PI: Michael Kelley	12	11.1	NIRCam/Imaging NIRSpec/IFU	GO
2211	A Pure Parallel Survey of Water in the Asteroid Belt	PI: David Trilling	12	0/38	NIRCam/Imaging	GO, Pure Parallel
2337	Composition of an Interstellar Object – Unique Insights into Protoplanetary Disk Midplane Chemistry	PI: Martin Cordiner	12	17.7	NIRSpec/IFU MIRI/LRS	GO, Disruptive ToO
2361	Are L-type Asteroids Ancient Reservoirs for the Earliest Solar System Solids?	PI: Katherine de Kleer	12	23.4	MIRI/MRS NIRSpec/FS	GO
2416	Measuring Volatile Production in Active Centaurs with JWST NIRSpec	PI: Adam McKay	12	26.3	NIRSpec/IFU	GO
2418	DiSCo-TNOs: Discovering the Composition of the Trans-Neptunian Objects, Icy Embryos for Planet Formation	PI: Noemi Pinilla-Alonso	0	98.2	NIRSpec/IFU	GO
2524	Trace Gases in Titan's Atmosphere with JWST MIRI	PI: Conor Nixon	12			AR
2537	Analysis of Low-Albedo Asteroids Observed through JWST Guaranteed Time	PI: Andrew Rivkin	12			AR
2550	The First Near-IR Spectroscopic Survey of Neptune Trojans	PI: Larissa Markwardt	12	24.1	NIRSpec/IFU	GO
2574	JWST Observations of Lucy Mission Targets	PI: Michael Brown	12	25.5	NIRSpec/IFU MIRI/MRS	GO

ID	Program Title	PI & Co-PIs	Exclusive Access Period (months)	Prime/ Parallel Time (hours)	Instrument/ Mode	Type
1586	Black Hole Jet Launching Physics with MIRI	PI: Poshak Gandhi Co-PIs: Thomas Maccarone and Aarran Shaw	12	6.6	MIRI/LRS	GO, Disruptive ToO
1621	Testing the Emerging Paradigm of Wind-driven Accretion with NIRSpec Spectro-imaging	PI: Ilaria Pascucci	12	15.1	NIRSpec/IFU	GO
1644	A Cornerstone Study of the Jet/Outflow Connexion: The Remarkable DG Tau B System	PI: Catherine Dougados Co-PI: Benoit Tabone	12	11.1	MIRI/MRS NIRSpec/IFU NIRCam/Imaging	GO
1666	Validating JWST's In-orbit Clock Accuracy	PI: Poshak Gandhi Co-PIs: Thomas Maccarone and Aarran Shaw	12	22.9	NIRCam/TSO	GO, Calibration
1706	PROJECT-J: PROtostellar JEt's Cradle Tested with JWST	PI: Brunella Nisini	12	23.1	MIRI/MRS NIRSpec/IFU	GO
1714	The Origin of the Crab Nebula	PI: Tea Temim	12	22.6	MIRI/Imaging MIRI/MRS NIRCam/Imaging	GO
1726	Shocks and Expanding Ejecta in Supernova 1987A	PI: Mikako Matsuura Co-PIs: Richard Arendt, Eli Dwek, Claes Fransson, and Josefin Larsson	12	24.3	NIRCam/Imaging	GO
1741	Solid-state Water Inside the Snowline in Planet-forming Disks: Exploring the Origin of Water on Terrestrial Planets	PI: Alexey Potapov Co-PI: Jeroen Bouwman	12	11.6	NIRSpec/IFU MIRI/MRS	GO
1742	Planetary Nebula NGC 6302 – A Testbed for Dust Formation and Processing in a Dense Torus Irradiated by Harsh UV Radiation	PI: Mikako Matsuura	12	17.8	MIRI/MRS	GO
1798	Characterizing Accretion Signatures in the Youngest Protostars: The Case of L1527 IRS	PI: John Tobin	12	7.6	NIRSpec/IFU MIRI/MRS	GO
1802	Investigating Protostellar Accretion Across the Mass Spectrum	PI: Tom Megeath	12	65.1	MIRI/MRS NIRSpec/IFU	GO
1860	Disentangling the Origin of Dust in Type IIn Supernovae	PI: Ori Fox	12	12.4	MIRI/MRS	GO
1863	Confirming the First Low-Metallicity Wolf-Rayet Dust Factory	PI: Ryan Lau	12	6.7	NIRSpec/IFU	GO
1874	JWST Spectrophotometry of Brown Dwarf Pulsars	PI: Stuart Littlefair Co-PIs: Gregg Hallinan and John Pineda	12	5.5	NIRISS/SOSS	GO
1905	Testing Protoplanetary Disk Evolution and Brown Dwarf Formation in Starburst: NIRCam and MIRI Observations of the Young Cluster Westerlund 1	PI: Mario Guarcello Co-PIs: Koraljka Muzic, Adam Ginsburg, Andrew Winter, Juan Martinez-Galarza, and others*	12	18.9	NIRCam/Imaging MIRI/Imaging	GO
1906	NAOMY-J: NIR-dark Accretion Outbursts from Massive Young Stellar Objects with JWST	PI: Alessio Caratti o Garatti Co-PIs: Jochen Eisloeffel and Bringfried Stecklum	12	24.9	NIRSpec/IFU MIRI/MRS	GO, Non-Disruptive ToO
1936	Nebular Spectroscopy of a Kilonova with JWST	PI: Charles Kilpatrick	0	14.9	NIRCam/Imaging NIRSpec/FS	GO, Non-Disruptive ToO, Long Term ToO
1947	JWST Survey of the Prototypical Core-collapse Supernova Remnant Cassiopeia A	PI: Dan Milisavljevic	12	45.1	MIRI/Imaging MIRI/MRS NIRCam/Imaging NIRSpec/IFU	GO
1959	Ice Chemical Complexity Toward the Ophiuchus Molecular Cloud	PI: Will Rocha	12	7.2	MIRI/MRS	GO
1960	The JWST Protostellar Ice Legacy Survey	PI: Ewine Van Dishoeck	12	21.5	NIRSpec/IFU	GO
1979	The Faintest and Coolest Stars in the Two Closest Globulars	PI: Luigi Bedin	12	6.9/2.2	NIRCam/Imaging	GO
1984	Fine-Tuned Search for Kilonova Emission in a Short Gamma-Ray Burst: Implications for Gravitational Wave Sources and r-Process Nucleosynthesis	PI: Edo Berger	0	11.9	NIRCam/Imaging NIRSpec/FS	GO, Disruptive ToO
2050	Mid-infrared Molecular Absorption in the Atmospheres of K Giants	PI: Gregory Sloan	12	5.3	MIRI/MRS	GO
2061	Nucleosynthesis, Astrophysics, and Cosmology with IR Observations of a Gravitational Wave Counterpart	PI: Ryan Foley	0	17.2	MIRI/Imaging NIRCam/Imaging NIRSpec/FS	GO, Disruptive ToO
2072	See Through Supernovae: Nebular Spectroscopy of Exploding White Dwarfs	PI: Saurabh Jha	0	19.8	MIRI/LRS NIRSpec/FS MIRI/MRS	GO, Non-Disruptive ToO
2091	Detecting the Synthesis of the Heaviest Elements with Photometry of a Kilonova in the Optically Thin Phase	PI: Maria Drout	0	9.3	NIRCam/Imaging MIRI/Imaging	GO
2114	MIR Spectroscopy of Type Ia Supernovae: The Key To Unlocking Their Explosions and Element Production	PI: Chris Ashall Co-PIs: Peter Hoeflich and Eddie Baron	0	21.1	MIRI/MRS	GO, Non-Disruptive ToO
2122	Dust, Mass Loss and Explosions of Massive Stars in the MIR	PI: Chris Ashall Co-PIs: Peter Hoeflich and Scott Davis	0	22.1	MIRI/MRS NIRSpec/FS	GO, Non-Disruptive ToO
2124	Explaining the Diversity of Cold Worlds	PI: Jacqueline Faherty	12	24.6	NIRSpec/FS MIRI/Imaging	GO
2204	Confirming the Most Massive Neutron Star with Observations of Its Companion	PI: Paulo Freire Co-PI: Rosie Chen	12	5.2	NIRCam/Imaging	GO
2209	Preparing for Planets: The Impact of the Extraordinary Outburst of EX Lup on Its Circumstellar Disk	PI: Peter Abraham	12	1.6	MIRI/MRS	GO
2288	Formation and Impact of Silicate Clouds on L Dwarfs	PI: Joshua Lothringer Co-PI: Jeff Valenti	0	7.4	NIRSpec/FS MIRI/MRS	GO
2302	Bolometric Luminosities of Cool Brown Dwarfs: The Key To Their Effective Temperatures and the Mass Function	PI: Michael Cushing	12	75	NIRSpec/FS MIRI/LRS MIRI/Imaging	GO
2327	Water Ice Clouds and Weather on the Coldest Brown Dwarf	PI: Andrew Skemer Co-PIs: Caroline Morley and Brittany Miles	12	13.7	NIRSpec/BOTS	GO
2348	Chemistry of Mass Loss in the Interacting Stripped-Envelope Supernova 2014C	PI: Samaporn Tinyanont	12	3	NIRSpec/IFU MIRI/MRS	GO
2395	A Comprehensive View of a Binary Neutron Star Merger	PI: Andrew Levan Co-PIs: Stephen Smartt and Andrew Fruchter	0	25	NIRSpec/FS NIRCam/Imaging	GO, Disruptive ToO
2473	Multiplicity Survey of 20 Y Dwarfs with NIRCam Kernel Phase Interferometry	PI: Loic Albert Co-PI: Michael Meyer	12	38.8	NIRCam/Imaging	GO
2559	Brown Dwarfs, White Dwarfs and Planetary Disks in an Ancient Stellar System	PI: Ilaria Caiazzo Co-PI: Harvey Richer	12	20.7	NIRCam/Imaging	GO
2635	Infrared Emission from the Magnetar 4U 0142+61: A Dusty Fallback Disk?	PI: George Pavlov Co-PI: Oleg Kargaltsev	12	2.9	MIRI/LRS NIRCam/TSO NIRCam/Imaging	GO
2640	A Census to the Bottom of the IMF in Westerlund 2: Atmospheres, Disks, Accretion, and Demographics	PI: William Best	12	9.4/3.8	NIRSpec/MOS	GO
2666	Are Supernovae Dust Factories?	PI: Ori Fox Co-PI: Tamas Szalai	12	12.8	MIRI/Imaging	GO
2692	Accurate Mass Determination of the Nearby Single White Dwarf L845-70 through Astrometric Microlensing	PI: Kailash Sahu	12	2.6	NIRCam/Imaging	GO

ID	Program Title	PI & Co-PIs	Exclusive Access Period (months)	Prime/ Parallel Time (hours)	Instrument/ Mode	Type
1557	Photodissociation Region Models for JWST Observations	PI: Mark Wolfire				AR
1558	The Ring Nebula as a Laboratory for the Interaction of Molecules, PAHs and Dust in Strong UV Radiation Fields	PI: Michael Barlow Co-PI: Nick Cox	12	19	MIRI/Imaging MIRI/MRS NIRCam/Imaging NIRSpec/IFU	GO
1591	NIRSpec IFU: Deuterated PAHs, PAH-nitriles, and PAH Overtone and Combination Bands	PI: Louis Allamandola Co-PI: Christiaan Boersma	12	25	NIRSpec/IFU	GO
1611	A Chemical Census of Volatile Ices in Protostellar Envelopes	PI: Klaus Pontoppidan	12	15.7	NIRCam/Imaging NIRSpec/MOS	GO
1617	The Boundary of Galaxy Formation: Constraints from the Ancient Star Formation of the Isolated, Extremely Low-Mass Galaxy Leo P	PI: Kristen McQuinn	12	35.7	NIRCam/Imaging	GO
1619	Dust Formation in a Primitive Environment	PI: Martha Boyer	12	24.1/2.1	MIRI/Imaging MIRI/LRS NIRCam/Imaging	GO
1678	Calibrating Billions of SPHEREx Spectra from 2.4 to 5.0 um	PI: Matthew Ashby	0	12.7	NIRSpec/FS	GO
1685	Uncrowding the Cepheids for an Improved Determination of the Hubble Constant	PI: Adam Riess	12	24.1	NIRCam/Imaging	GO
1854	It's Complicated: Disentangling the Formation Pathways of Complex Organic Molecules from Molecular Clouds to Comets.	PI: Melissa McClure	12	17.7	MIRI/MRS NIRSpec/IFU	GO
1908	Constraining the Nature of the First Stellar Complexes: Globular Cluster Precursors and Population III Stellar Clusters at z~6-7	PI: Eros Vanzella	12	24.5	NIRSpec/IFU	GO
1939	The Galactic Center	PI: Jessica Lu	12	16.5	NIRCam/Imaging NIRSpec/IFU	GO
2045	Testing the Physical Origin of the Initial Mass Function and Circumstellar Disk Destruction with Massive Clusters at the Galactic Center	PI: Matthew Hosek	12	2.6	NIRCam/Imaging	GO
2074	Galactic Archaeology with Brown Dwarfs in Medium-Deep JWST Observations	PI: Russell Ryan				AR
2092	Unveiling Stellar Birth in a Cosmologically Common Cradle	PI: Steven Longmore Co-PI: Jens Kauffmann	12	19.5	NIRCam/Imaging MIRI/Imaging	GO
2104	Mapping the Hot Gas Where an Outflow Is Launched from a Protoplanetary Disk	PI: Daniel Harsono Co-PIs: Per Bjerkeli, Lars Kristensen, Jon Ramsey, Jes Jorgensen and others*	12	5.3	NIRSpec/IFU	GO
2107	A JWST-HST-VLT/MUSE-ALMA Treasury of Star Formation in Nearby Galaxies	PI: Janice Lee Co-PIs: Karin Sandstrom, Adam Leroy, Eva Schinnerer, David Thilker, and others*	0	106.9/10.7	MIRI/Imaging NIRCam/Imaging	GO, Treasury
2128	The First Resolved View of Individual Star Formation Across a Spiral Arm	PI: Erik Rosolowsky	12	22.8/8	MIRI/Imaging	GO
2143	The Turbulent Magnetized Interstellar Medium: Looking for Ambipolar Diffusion in the Pleiades	PI: Francois Boulanger Co-PI: Vincent Guillet	12	11.3	NIRCam/Imaging	GO
2151	Blazing the Trail of COMs from Ice to Gas	PI: Yao-Lun Yang	12	24.6	MIRI/MRS	GO
2155	Probing Silicate and Carbonaceous Dust and Ice in Distant Galaxies with Mid-IR Spectroscopy of Quasars with Foreground 2175 A Absorbers	PI: Varsha Kulkarni	12	19.8	MIRI/MRS	GO
2183	Illuminating the Dust Properties in the Diffuse ISM with JWST	PI: Sascha Zeegers	12	31	MIRI/MRS NIRCam/GTS	GO
2221	Star Formation along the Galactic Dust Ridge: The Brick and Cloud C	PI: Adam Ginsburg Co-PI: Alyssa Bulatek	12	8.6/1.6	NIRCam/Imaging MIRI/Imaging	GO
2317	Initial Mass Function in the Lowest Metallicity Protocluster in the Galaxy	PI: Yu Cheng Co-PIs: Morten Andersen, Jonathan Tan, Ruben Fedriani, and Massimo Robberto	12	2.8	NIRCam/Imaging	GO
2331	Unveiling Grain Growth in Very Dense Galactic Cores	PI: Roberta Paladini Co-PI: Alberto Noriega-Crespo	12	60	MIRI/MRS	GO
2352	Wide Binary Stars in Nearby Dwarf Galaxies: A Novel Probe of Dark Matter on Subgalactic Scales	PI: Matthew Walker				AR
2402	Opening Pandora's Box: Revealing the Hidden Content of a Forming Super Star Cluster	PI: Jean Turner	12	2.5	MIRI/MRS	GO
2433	Imaging the Disk-halo Boundary Layer: PAH Emission as a Probe of the Energetics and Physics of Interstellar Thick Disks	PI: Jay Howk	12	16.1		GO
2441	An Investigation of Claimed Silicate Dust Crystallinity in a z=0.9 Spiral Galaxy	PI: Monique Aller	12	11.3	MIRI/MRS	GO
2459	Completing the Puzzle of Interstellar Dust Grain Compositions: Combining Extinction, Depletion, and Molecular Hydrogen Measurements	PI: Marjorie Decleir	12	16.9	NIRCam/GTS MIRI/MRS	GO
2491	Low-mass Star Formation in the Inner Parsec of Our Galaxy	PI: Nadeen Sabha	12	11.6	MIRI/MRS	GO
2521	The First Ever Low Metallicity PDR Benchmark	PI: Karin Sandstrom Co-PI: Mark Wolfire	12	16	MIRI/MRS NIRSpec/IFU	GO
2526	Density Structure and Fragmentation Manner of Infrared Dark Filaments	PI: Philippe Andre Co-PI: Michael Mattern	12	23.5	MIRI/Imaging	GO
2560	Solving the Globular Clusters Multiple Population Enigma through JWST	PI: Anna Marino	12	19/13	NIRSpec/MOS	GO
2609	Searching for the Alpha-Abundance Bimodality in the M31 Disk	PI: David Nidever Co-PIs: Karoline Gilbert and Erik Tollerud	12	14.9	NIRCam/Imaging NIRSpec/MOS	GO
2662	NGC 602 in the SMC, As Seen by Webb – Progressive Star Formation under Extraordinary Conditions?	PI: Peter Zeidler	12	12.3/1.4	NIRCam/Imaging MIRI/Imaging	GO
2677	Mapping the Aromatic Smoke from the Superwind of the Archetypal Starburst M82	PI: Aigen Li	12	10.2	NIRSpec/MOS	GO

ID	Program Title	PI & Co-PIs	Exclusive Access Period (months)	Prime/ Parallel Time (hours)	Instrument/ Mode	Type
1554	Nebular Line Diagnostics in a Merger at Cosmic Dawn	PI: Roberto Decarli	12	7.8	NIRSpec/IFU	GO
1670	Closing in on the Launching Sites of AGN Outflows	PI: Thomas Shimizu	12	34	MIRI/MRS	GO
1717	Feedback around Supermassive Black Holes in Dusty Nuclei	PI: Vivian U	0	27.6	MIRI/MRS	GO
1760	First Accreting Black Hole Candidates: Infrared-dropout Heavily Obscured X-ray AGNs	PI: Hyewon Suh	12	23.6	NIRSpec/FS MIRI/LRS	GO
1764	A Comprehensive JWST View of the Most Distant Quasars Deep into the Epoch of Reionization	PI: Xiaohui Fan Co-PIs: Jinyi Yang and Eduardo Banados	12	65.5/8.6	NIRCam/Imaging MIRI/Imaging NIRSpec/FS NIRSpec/IFU MIRI/MRS	GO
1813	Unveiling Stellar Light from Host Galaxies of z~6 Quasars	PI: Madeline Marshall	12	15.9	NIRCam/Imaging	GO
1875	Kinetic and Chemical Feedback in Radio-Quiet AGN as a Driver of the Galaxy Evolution – Revealed in ESO 420-G13	PI: Juan Fernandez Ontiveros	12	4	MIRI/MRS	GO
1928	Blowing Star Formation Away: Unraveling Molecular Wnds in AGN	PI: Rogemar Riffel Co-PI: Nadia Zakamska	12	16.2	NIRSpec/IFU MIRI/MRS	GO
1964	The Role of Radio AGN Feedback in Massive Galaxies at z = 4 - 6	PI: Roderik Overzier Co-PI: Aayush Saxena	12	23.8	NIRSpec/IFU	GO
1967	A Complete Census of Supermassive Black Holes and Host Galaxies at z=6	PI: Masafusa Onoue Co-PIs: Yoshiki Matsuoka, Takuma Izumi, John Silverman, and Xuheng Ding	12	49.5	NIRSpec/FS NIRCam/Imaging	GO
1970	Zooming into the Monster's Mouth: Tracing Feedback from Their Hosts to Circumgalactic Medium in z=3.5 Radio-loud AGN	PI: Wuji Wang	12	24.5	NIRSpec/IFU	GO
1983	Uncovering Intermediate Mass Black Holes with JWST: Pushing the Frontier	PI: Shobita Satyapal	12	11.2	NIRSpec/IFU	GO
2004	Pressure Gradients of the Molecular Gas and Their Role in Cloud Stability in Massive Outflows Driven by Black Hole Jets	PI: Kalliopi Dasyra	12	5.6	MIRI/MRS	GO
2016	Revealing Low Luminosity Active Galactic Nuclei (ReveaLLAGN)	PI: Anil Seth	12	31.9	NIRSpec/IFU MIRI/MRS	GO
2028	Mapping a Distant Protocluster Anchored by a Luminous Quasar in the Epoch of Reionization	PI: Feige Wang Co-PI: Jinyi Yang	12	16.3/5.8	NIRSpec/MOS NIRSpec/IFU	GO
2057	A JWST Study of the Link Between Supermassive Black Holes and Galaxies at Cosmic Noon	PI: Yue Shen Co-PI: Jennifer Li	12	22.4	NIRCam/Imaging NIRSpec/IFU	GO
2064	Dust in the Wind: Testing a New Paradigm for the Nature of AGN Feedback	PI: David Rosario Co-PIs: Sebastian Hoenig and Leonard Burtscher	12	19.3	MIRI/Imaging	GO
2075	The Ultra Violet Output of Sgr A*	PI: Chi-kwan Chan Co-PI: Andras Gaspar	12	10.4	MIRI/MRS	GO
2080	Exploration of the Nuclear Jet Impact on the Interstellar Medium in Seyfert Galaxy NGC 4258	PI: Jason Glenn	6	24	NIRCam/Imaging	GO
2108	Constraining the Seeding and Growth of First Black Holes via Observable Signatures from the Early Universe	PI: L. Y. Aaron Yung Co-PI: Jonathan Gardner				AR
2177	A Missing Piece of the Puzzle: The Warm Molecular Phase of AGN-driven Outflows at Cosmic Noon	PI: Vincenzo Mainieri	12	13.1	MIRI/MRS	GO
2228	Probing the M87 Supermassive Black Hole with Parsec-Scale Stellar Dynamics	PI: Jonelle Walsh	12	9.9	NIRSpec/IFU	GO
2235	Imaging the Shadow of a Black Hole through Sgr A* Monitoring	PI: Farhad Yusef-Zadeh	12	24.9	NIRCam/Imaging	GO
2249	Monster in the Early Universe: Unveiling the Nature of a Dust Reddened Quasar Hosting a Ten-Billion Solar Mass Black Hole at z=7.1	PI: Jinyi Yang Co-PI: Feige Wang	12	5.5	NIRSpec/IFU MIRI/Imaging	GO
2446	Illuminating the AGN-Galaxy Connection with JWST: AGN Host Demographics During the Era of Galaxy Assembly	PI: Dale Kocevski				AR
2547	Quasar Feedback in Action: The Multiphase and Multiscale Outflow of the Most Luminous Quasar in the Local Universe	PI: Sylvain Veilleux	12	8.7	MIRI/MRS NIRSpec/IFU	GO
2554	AGN Feeding and Feedback in NGC 4151	PI: Francisco Mueller-Sanchez				AR
2654	Kpc-scale Dual Supermassive Black Holes and Their Impact on Galaxy Formation at Cosmic Noon	PI: Yuzo Ishikawa Co-PIs: Yue Shen and Xin Liu	12	16.4	NIRSpec/IFU MIRI/MRS	GO
2701	Unveiling the Nature of CID-42. The Best Candidate for a Gravitational Wave Recoiling Supermassive Black Hole	PI: Francisco Mueller-Sanchez	12	6.7	NIRSpec/IFU	GO

Abbreviations:

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.

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General Observer Programs in Cycle 1

Science Categories for GO Proposals

Exoplanets and Exoplanet Formation

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Intergalactic Medium and the Circumgalactic Medium

Large Scale Structure of the Universe

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Stellar Populations and the Interstellar Medium

Supermassive Black Holes and Active Galaxies

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