JWST Preparatory Programs

The James Webb Space Telescope (JWST) is NASA's flagship mission slated to offer extensive photometric and spectroscopic capabilities in the 0.7-28 micron wavelength region. In some cases, Hubble observations are essential to achieving critical science goals for future JWST programs.The JWST Initiative, starting with HST Cycle 24, is designed to provide an opportunity to obtain observations with Hubble that complement and enhance the scientific impact of JWST observations. The following accepted proposals indicated that they were preparatory programs for accomplishing breakthrough science with JWST.

The planned orbit counts may not be completely accurate especially for multi-cycle programs.

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First Cycle for the Program Proposal
Title PI Planned External Orbits* Planned Parallel Orbits*
29 16752 Exoplanets and Exoplanet Formation The composition of exoplanetary bodies - as probed in accreting white dwarfs with gaseous emission Rogers, Laura 7 0
29 16747 Stellar Populations and the Interstellar Medium FUV-Optical Spectroscopic Mapping of the PDRs in NGC7023 and The Horsehead Misselt, Karl 47 0
29 16735 Stellar Physics and Stellar Types Characterizing Cold Discoveries in the Sun's Backyard Schneider, Adam 12 0
29 16733 Galaxies Mapping the escape of Ly alpha and ionizing photons from an extreme emission-line lensed galaxy Rigby, Jane R. 10 0
29 16722 Exoplanets and Exoplanet Formation An HST exclusive look at two rising stars: high-energy spectra of the two closest M dwarfs to host transiting terrestrial exoplanets Diamond-Lowe, Hannah 15 0
29 16720 Solar System Astronomy A combined HST and JWST study of the composition of the faintest trans-Neptunian objects: Testing hypotheses for the formation of the Solar System Trilling, David E. 99 0
29 16693 Supermassive Black Holes and AGN The host galaxy and environment of a radio galaxy near the epoch of reionization Overzier, Roderik A. 18 0
29 16668 Stellar Physics and Stellar Types Monitoring Earendel, the Lensed z~6 Star Coe, Dan 4 0
29 16667 Galaxies The Final Frontier: HST and JWST Exploration of Galaxies Across Cosmic Epochs Bradac, Marusa 56 0
29 16666 Exoplanets and Exoplanet Formation A deep and complete characterization of the Vega debris and planetary system in scattered light Wolff, Schuyler G. 32 0
29 16665 Large Scale Structure of the Universe The HST/JWST Quasar Legacy Survey: Probing the Primordial Environment of Quasars and the Topology of Cosmic Reionzation Wang, Feige 66 0
29 16641 Galaxies HST/WFC3-IR Imaging of Exceptionally Luminous Himiko/CR7-Like Galaxies at z>6 Egami, Eiichi 14 0
28 16303 Stellar Physics and Stellar Types Fine-Tuned Search for Kilonova Emission in a Short Gamma-Ray Burst: Implications for the Progenitors, GW Sources, and r-Process Nucleosynthesis Berger, Edo 10 0
28 16289 Stellar Populations and the Interstellar Medium Multiple stellar populations in Globular Clusters: exploring the low mass regime Milone, Antonino Paolo 18 18
28 16259
Galaxies 3D-DASH: A Wide Field WFC3/IR Survey of COSMOS Momcheva, Ivelina G 259 0
28 16252
Large Scale Structure of the Universe TREASUREHUNT: Hubble's UV-Visible treasury imaging of the JWST NEP Time-Domain Field Jansen, Rolf A. 52 52
28 16228
Exoplanets and Exoplanet Formation A Multi-Cycle Monitoring Program of the Hydra's Shadow Debes, John Henry 12 0
28 16180 Exoplanets and Exoplanet Formation Constructing the First Spectroscopic, Multi-Dimensional Map of a Hot Jupiter Kataria, Tiffany 30 0
28 16177 Stellar Populations and the Interstellar Medium Digging into the mystery of the Galactic globular clusters M22 and NGC1851 Calamida, Annalisa 5 5
28 16166 Exoplanets and Exoplanet Formation MUSCLES Extension for Atmospheric Transmission Spectroscopy: Essential Ultraviolet Stellar Characterization for Guaranteed JWST Transiting Planet Targets France, Kevin 57 0
27 15977 Cosmology Characterizing the Environment Around The Most Distant Known Galaxy Oesch, Pascal 11 11
27 15964 Stellar Physics Fine-Tuned Search for Kilonova Emission in a Short Gamma-Ray Burst: Implications for the Progenitors, GW Sources, and r-Process Nucleosynthesis Berger, Edo 10 0
27 15959 Cosmology Observations of the JWST/GTO Very Rich Cluster Lens RMJ121218.5+273255.1 Zitrin, Adi 5 0
27 15952 Stellar Populations A first measurement of the global AGB dust production in a metal-rich galaxy Jones, Olivia 4 0
27 15936
Cosmology Flashlights: Many Extremely Magnified Individual Stars as Probes of Dark Matter and Stellar Populations to Redshift z~2 Kelly, Patrick 192 192
27 15924 Stellar Physics A case study for JWST: Disentangling auroral and cloud variability in early L dwarfs Vos, Johanna 16 0
27 15917 Stellar Populations Calibrating the Tip of the Red Giant Branch Distance Indicator in the Near-Infrared McQuinn, Kristen B W 8 8
27 15902 Stellar Populations Tracing the 6-D Orbital and Formation History of the Complete M31 Satellite System Weisz, Daniel R. 244 244
27 15865 Galaxies and the IGM Mg II Emission: A new Tracer for Lyman Alpha and Lyman Continuum Henry, Alaina L. 19 0
27 15840 Galaxies and the IGM The COS Legacy Archive Spectroscopic SurveY (CLASSY): A UV Treasury of Star-Forming Galaxies Berg, Danielle 133 0
27 15839 Planets and Planet Formation Mapping the distribution of the planetary debris accreted across the surface of the white dwarf G29-38 Toloza Castillo, Odette Fabiola 35 0
27 15837 Stellar Physics The HST follows galactic influencers: a COS UV survey of the most massive O-stars in the SMC Oskinova, Lidia 18 0
26 15654 Galaxies and the IGM PHANGS-HST: Linking Stars and Gas throughout the Scales of Star Formation Lee, Janice 122 0
26 15647 Galaxies and the IGM Ultraviolet Imaging of the Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey Fields (UVCANDELS) Teplitz, Harry 164 0
26 15626 Galaxies and the IGM The Low-Redshift Lyman Continuum Survey Jaskot, Anne 134 0
25 15355
Stellar Physics Perfect Blackbody Spectra for JWST and Next Generation UV-Opt-IR Standard Star Network Suzuki, Nao 28 0
25 15341 Galaxies and the IGM Testing a New Method for Finding Leaky Galaxies: Implications for the Epoch of Reionization Heckman, Timothy M. 13 0
25 15333 Planets and Planet Formation The Atmospheric Diversity of Mini-Neptunes in Multi-planet Systems Crossfield, Ian 125 0
25 15304 Planets and Planet Formation Collecting the Puzzle Pieces: Completing HST's UV+NIR Survey of the TRAPPIST-1 System ahead of JWST de Wit, Julien 114 0
25 15288 Planets and Planet Formation How small and how high? Enabling UV exoplanet cloud and exosphere science with WFC3/UVIS Sing, David K. 10 0
25 15278 Cosmology UV-Visible Imaging of the JWST NEP Time-Domain Field: the *best* extragalactic survey field *always* accessible to JWST Jansen, Rolf A. 36 36
25 15271 Galaxies and the IGM Can Low-Luminosity Galaxies Reionize the Universe? Ferguson, Harry C. 39 0
25 15267 Massive Black Holes And Their Host Galaxies HST Grism observations of the highest-z massive galaxy cluster Canning, Rebecca E. A. 13 0
25 15238 Stellar Physics The IMF to Planetary Masses Across the Milky Way Kraus, Adam L. 132 0
25 15219 Planets and Planet Formation Super-Keplerian Motions in the AU Mic Circumstellar Debris System Wisniewski, John P. 12 0
25 15212
Galaxies and the IGM The brightest galaxies in the first 700 Myr: Building Hubble's legacy of large area IR imaging for JWST and beyond Trenti, Michele 0 530
25 15207
Solar System The Moons of Kuiper Belt Dwarf Planets Makemake and 2007 OR10 Parker, Alex Harrison 18 0
25 15178 Stellar Physics Probing jets from young embedded sources Nisini, Brunella 16 0
25 15171 Solar System The rotation period, orbit, and mass of Eris' satellite Dysnomia Holler, Bryan Jason 6 0
25 15137 Galaxies and the IGM Spectroscopically-Confirmed z > 6 Galaxies with Extremely Blue UV Slopes: Possible Pop III dominated targets for JWST spectroscopy Jiang, Linhua 12 0
25 15117 Galaxies and the IGM BUFFALO Steinhardt, Charles Louis 101 101
25 15106 Galaxies and the IGM The UV attenuation in JWST target VV 191 Holwerda, Benne Willem 10 0
25 15103 Galaxies and the IGM Beacons in the dark: using the most distant galaxies to probe cosmic reionization De Barros, Stephane 18 18
25 15092 Galaxies and the IGM Testing Dust Models at Moderate Redshift: Is the z=0.437 DLA toward 3C 196 Rich in Carbonaceous Dust? Aller, Monique C 6 0
25 15085 Galaxies and the IGM Galaxies in the Diffuse Baryon Field Approaching Reionization: A Joint Study with JWST, HST, and Large Telescopes Simcoe, Robert Andrew 18 0
25 15071 Planets and Planet Formation The Mega-MUSCLES Treasury Survey: Measurements of the Ultraviolet Spectral Characteristics of Low-mass Exoplanetary Systems Froning, Cynthia Suzanne 157 0
25 15070 Planets and Planet Formation An HST Spectroscopic Study of Protoplanetary Disk Abundances: CO/H2 Conversion Factors and Absolute Abundances for JWST France, Kevin 42 0
24 14807
Stellar Populations The primordial binary fraction in the young massive cluster Westerlund 2 Sabbi, Elena 45 0
24 14797 ExoPlanets Atmospheric Albedos, Alkalis, and Aerosols of Hot Jupiters Crossfield, Ian 44 0
24 14767 ExoPlanets The Panchromatic Comparative Exoplanetary Treasury Program Sing, David K. 498 0
24 14764
ExoPlanets Measuring the structure of Fomalhaut's dusty debris belt via a fortuitous stellar occultation Holwerda, Benne Willem 3 0
24 14758 ExoPlanets The Hydrogen Content of a Rocky Earth-Size Exoplanet Berta-Thompson, Zach K. 20 0
24 14747 Galaxies Lyman Continuum Escape Survey (LACES): Detecting Ionizing Radiation from z~3 LAEs with Powerful Optical Lines Robertson, Brant 64 0
24 14734 Stellar Pops Milky Way Cosmology: Laying the Foundation for Full 6-D Dynamical Mapping of the Nearby Universe Kallivayalil, Nitya 164 0
24 14711 Stellar Populations A Deep WFC3/IR Bulge Luminosity Function: toward the Hydrogen Burning Limit Rich, R. Michael 8 0
24 14689 Stellar Populations MYSST: Mapping Young Stars in Space and Time - The HII Complex N44 in the LMC Gouliermis, Dimitrios 54 0
24 14652 Galaxies Super-Eight: The brightest z~8 Galaxies Holwerda, Benne Willem 16 0
24 14642 ExoPlanets A Preparatory Program to Identify the Single Best Transiting Exoplanet for JWST Early Release Science Stevenson, Kevin 8 0
24 14622 Galaxies A Chance Alignment: Resolving a Massive Compact Galaxy Actively Quenching at z=1.8 Whitaker, Katherine E. 12 0
24 14616 Solar System Primordial Triplicity: A Census of Hierarchical Triples in the Cold Classical Kuiper Belt Porter, Simon Bernard 6 0
First Cycle for the Program Proposal
Title PI Planned External Orbits* Planned Parallel Orbits*