DDT
Director's Discretionary Time Observations
Director’s Discretionary Time (DDT) can be requested for time-critical observations that cannot plausibly be scheduled for the regular proposal cycle. These types of proposals might be appropriate for the follow-up of newly-discovered unexpected transient phenomena or when developments since the last proposal cycle make a time-critical observation necessary. They are also appropriate for timely follow-up of new discoveries that will provide a critical link in the understanding of the phenomena.
To view details about a specific program, click the Program ID.
| PID | Title | PI | Instruments | Allocated Hours | Cycle |
|---|---|---|---|---|---|
| 12591 | MIRI and NIRCam imaging of star forming pillar | Macarena Garcia Marin | NIRCam MIRI |
14.1 | 4 |
| 12580 | DDT: Catching an FU Ori Outburst Near Inception | Lynne Hillenbrand | MIRI | 2.5 | 4 |
| 12574 | From photosphere to nebula: the time evolution of a gravitationally lensed, hydrogen-poor superluminous supernova at z ~ 2 | Maggie Li | NIRSpec | 8.7 | 4 |
| 12569 | Are LFBOTs Dusty? Constraining the Nature of IR Emission in the Luminous Fast Blue Optical Transient AT2026dbl | Natalie LeBaron | NIRCam MIRI |
5.2 | 4 |
| 12518 | Confirmation of a new outer planet orbiting beta Pictoris A | Aidan Gibbs |
NIRSpec MIRI |
12.9 | 4 |
| 12510 | From photosphere to nebula: the time evolution of a gravitationally lensed, hydrogen-poor superluminous supernova at z ~ 2 | Maggie Li | NIRSpec | 4.8 | 4 |
| 12509 | Evaluating a Distantly Bright Kreutz Sungrazer | Qicheng Zhang |
NIRCam MIRI |
6.9 | 4 |
| 12507 | A Panoramic View of Rapid Dust Production by Disintegrating Asteroids around a White Dwarf | Siyi Xu |
NIRSpec MIRI |
15.9 | 4 |
| 12503 | Constraining the Hubble Constant with Nebular-Phase Spectroscopy of a 20x Magnified, Multiply Imaged Supernova | Justin Pierel | NIRSpec | 7.1 | 4 |
| 12499 | Confirming a Possible Escapee from the Outer Main Belt | Qicheng Zhang |
NIRSpec MIRI |
5.5 | 4 |
| 12498 | Rocky Worlds DDT: JWST Observations of LHS 1140 b | Nestor Espinoza | MIRI | 30.0 | 4 |
| 12496 | NIRcam and MIRI observations of a radio galaxy | Macarena Garcia Marin |
NIRCam MIRI |
50.5 | 4 |
| 12494 | Characterizing a Luminous Red Nova in Real Time | Keiichi Maeda |
NIRSpec MIRI |
5.9 | 4 |
| 12493 | Through a Circumstellar Disk, Darkly, with JWST | Eric Gaidos |
NIRSpec MIRI |
6.1 | 4 |
| 12492 | Confirming an 8th planet in the TRAPPIST-1 system | Eric Agol | NIRSpec | 22.7 | 4 |
| 12491 | NIRCam and MIRI observations of a young stellar cluster | Macarena Garcia Marin |
NIRCam MIRI |
14.3 | 4 |
| 12490 | The Afterlife of SN 2024pxl: JWST Late-Time Spectroscopy of a Surviving White Dwarf | Lindsey Kwok |
MIRI NIRSpec |
5.9 | 4 |
| 12488 | Testing the volatile variability of fragmenting Oort cloud comet C/2025 K1 ATLAS | Bryce Bolin |
NIRSpec MIRI |
21.1 | 4 |
| 12487 | CEE it happen: Common-Envelope Evolution in action with early JWST observations of a stellar merger in M31 | Viraj Karambelkar | MIRI | 3.2 | 4 |
| 12486 | DDT: Catching an FU Ori Outburst Near Inception | Lynne Hillenbrand | MIRI | 5.8 | 4 |
| 12485 | Multiwavelength JWST and HST observations of the off-nuclear TDE AT 2025abcr | Kishore Patra | NIRSpec MIRI |
9.1 | 4 |
| 12481 | Capturing Planetesimal Chemistry from Fragmenting Oort Cloud Comet C/2025 K1 (ATLAS) | John Noonan | NIRSpec NIRCam |
9.9 | 4 |
| 12470 | The first James Webb Space Telescope Observations of an early-time, nearby tidal disruption event | Jean Somalwar | NIRSpec MIRI |
5.2 | 4 |
| 12468 | The First Near-Infrared Nebular Spectrum of a Pair-Instability Supernova | Daichi Hiramatsu | NIRSpec | 4.6 | 4 |
| 9548 | NIRCam and MIRI observations of a double-shell planetary nebula | Macarena Garcia Marin |
NIRCam MIRI |
4.1 | 4 |
| 9547 | NIRCam and MIRI observations of a barred galaxy | Macarena Garcia Marin |
NIRCam MIRI |
8.7 | 4 |
| 9546 | NIRCam observations of embedded protostar | Macarena Garcia Marin | NIRCam | 4.7 | 4 |
| 9512 | First Shift at an Elusive Dust Factory: Early dust and molecule formation in a giant star merger | Viraj Karambelkar |
NIRSpec MIRI |
4.9 | 4 |
| 9493 | SN Eos: A Multiply-Imaged, 30x Magnified SN Near the Epoch of Reionization | David Coulter |
NIRCam NIRSpec |
10.1 | 4 |
| 9492 | From Rags to Calcium-riches: Using JWST to Constrain Progenitor Identity and Dust Formation in the Calcium-strong Transient 2025coe | Wynn Jacobson-Galan |
NIRSpec MIRI |
6.0 | 4 |
| 9482 | Time-Critical Follow-Up of Newly Discovered Uranian Moon with JWST/NIRCam | Maryame El Moutamid | NIRCam | 5.9 | 4 |
| 9481 | Characterizing an onging outburst of a rare centaur C/2023 RS61 with joint JWST and HST observations | Eva Lilly | NIRSpec | 5.5 | 4 |
| 9478 | SN Ares: A Strongly Lensed, High-z CCSN with Remarkable Time Delays | Conor Larison | NIRSpec NIRCam |
3.5 | 4 |
| 9453 | Timely Follow-up of Newly Discovered Methane Fluorescence on Makemake to Investigate Its Origin and Variability | Silvia Protopapa | NIRSpec | 11.4 | 4 |
| 9448 | An accretion burst in a planetary mass objects: DDT observations of Cha1107-7626 | Aleks Scholz | NIRSpec MIRI |
9.7 | 4 |
| 9447 | GRB 250702B/D/E Burning Red: A GRB or TDE? | Huei Sears | NIRCam | 6.3 | 4 |
| 9443 | CIGMA (Crystals, Ice, and Gas Molecules under Accretion): How Bursts Transform the Circumstellar Disk WL17 | Jeong-Eun Lee | NIRSpec MIRI |
3.8 | 4 |
| 9442 | MIRI MRS Observations of the Third Interstellar Object | Matthew Belyakov | MIRI | 9.2 | 4 |
| 9441 | Enabling early decision making for a possible lunar impact in 2032 | Andrew Rivkin | NIRCam | 14.4 | 4 |
| 9438 | Certum: Multiband Webb Images in the Inner Galaxy for the Roman Galactic Plane Survey | Eddie Schlafly | NIRCam | 30.0 | 4 |
| 9436 | The Night of Several Transits: Probing Stellar Behavior and Planetary Diversity in K2-384 | Vigneshwaran Krishnamurthy | NIRSpec | 15.3 | 4 |
| 9433 | Black hole primacy - do supermassive black holes really predate galaxies? | Roberto Maiolino | NIRSpec | 5.4 | 4 |
| 9431 | First Images of our Young Jupiter Neighbor | Jorge Llop-Sayson | NIRCam | 8.7 | 4 |
| 9259 | The evolving activity drivers in a newly discovered distant comet | Colin Snodgrass | NIRSpec | 3.1 | 4 |
| 9258 | SN 2024aecx: A Gateway to Understanding Massive Star Deaths, Cosmic Dust, and Binary Systems | Melissa Shahbandeh | NIRSpec MIRI |
14.5 | 4 |
| 9381 | Unveiling the Nature of a Bright, Long-Duration Transient Discovered in Four-Epoch JWST Observations Over Two Years | Feige Wang | NIRSpec | 4.1 | 3 |
| 9372 | A Luminous, Red Transient at z = 3: An Extreme Test Bed for Supernova Evolution | Estefania Padilla Gonzalez | NIRSpec NIRCam |
8.0 | 3 |
| 9356 | HZTDE-1: The Highest-Redshift TDE Candidate, Revealing the Origins of Supermassive Black Holes | Mitchell Karmen | NIRSpec | 9.5 | 3 |
| 9331 | A Deep Search for a Counterpart to the Nearby FRB 20250316A | Peter Blanchard | NIRCam | 4.2 | 3 |
| 9327 | Confirmation of a direct-collapse supermassive black hole | Pieter van Dokkum | NIRSpec | 2.8 | 3 |
| 9296 | A supernova at z=7.3 | Andrew Levan | NIRCam | 8.7 | 3 |
| 9252 | Confirming a Planet Orbiting Our Closest Solar Twin | Charles Beichman | MIRI | 45.5 | 3 |
| 9251 | Probing Pre-Existing Dust in SN 2024xuo with JWST: Insights into Massive Star Evolution | Marco Gomez-Munoz | MIRI | 3.3 | 3 |
| 9249 | JWST observations of the off-nuclear TDE AT 2024tvd | Kishore Patra | NIRSpec NIRCam |
6.1 | 3 |
| 9245 | The unprecedented appearance and future evolution of silicate emission in the disk of T Cha | Agnes Kospal | MIRI | 4.8 | 3 |
| 9239 | Size Measurements of a Potential Earth-Impacting Asteroid with JWST MIRI and NIRCAM | Andrew Rivkin | MIRI NIRCam |
11.2 | 3 |
| 9235 | Rocky Worlds DDT: JWST Observations of GJ 3929 b | Nestor Espinoza | MIRI | 75.0 | 3 |
| 9234 | Rocky Worlds DDT: JWST Observations of LTT 1445 A c | Nestor Espinoza | MIRI | 33.0 | 3 |
| 9233 | SN 2024aecx: A Gateway to Understanding Massive Star Deaths, Cosmic Dust, and Binary Systems | Melissa Shahbandeh | MIRI NIRSpec |
18.2 | 3 |
| 9232 | MIRI imaging observations of planetary nebula section | Macarena Garcia Marin | MIRI | 2.2 | 3 |
| 9231 | SN 2024vjm, Probing Evolution, Molecule, and Dust Formation in the nearest Type Iax Supernova | Eddie Baron | NIRSpec MIRI |
9.0 | 3 |
| 9230 | The Aftermath of a Transient Deposition Event on Europa | Samantha Trumbo | NIRSpec | 13.2 | 3 |
| 9228 | Investigating the Origin of High Redshift Short GRB 241105A and Its Implications for GRB Classification and r-Process Enrichment | Dimple Dimple | NIRCam | 5.4 | 3 |
| 9224 | MIRI and NIRCam observations of a planetary nebula | Macarena Garcia Marin | MIRI NIRCam |
6.4 | 3 |
| 9223 | Let there be Light: Directly Witnessing the Birth of Metal-Free, Pop III Stars in an Ultra-Faint Galaxy at z=6.5 | Seiji Fujimoto | NIRSpec | 38.7 | 3 |
| 9219 | NIRCam Observations of a Solar System Object | Macarena Garcia Marin | NIRCam | 3.8 | 3 |
| 6838 | Boom and Dust: Near- and Mid-IR Observations of the Nearest Type Icn Supernova Dust Factor | Kyle Davis | MIRI NIRSpec |
7.5 | 3 |
| 6811 | So Close, Yet So Faint: NIR+MIR Spectroscopy of the Nearest SN Iax 2024vjm | Lindsey Kwok | MIRI NIRSpec |
13.4 | 3 |
| 6809 | Observing the birth of a black hole in M31 | Kishalay De | MIRI NIRSpec |
9.6 | 3 |
| 6803 | NIR+MIR Spectroscopy of the Nearby Broad Line Type Ic SN 2024abup: r-process, Dust and Explosion Physics | Manisha Shrestha | MIRI NIRSpec |
2.9 | 3 |
| 6801 | Completing the control field observations of GO-1905 | Mario Guarcello | NIRCam | 1.5 | 3 |
| 6797 | Confirming the presence of a gas giant planet orbiting a nearby solar-type star | Charles Beichman | MIRI | 48.8 | 3 |
| 6785 | NIRCam observations of a protestellar envelope and jet | Macarena Garcia Marin | NIRCam | 4.4 | 3 |
| 6783 | NIRCam observations of a star forming nebula and young cluster | Macarena Garcia Marin | NIRCam | 5.4 | 3 |
| 6780 | A Deep Look at Quaoar's Ring System | Benjamin Proudfoot | NIRCam | 3.7 | 3 |
| 6779 | Pushing Boundaries: Unveiling the Most Distant Fast Radio Burst with JWST | Manisha Caleb | NIRCam NIRSpec |
12.7 | 3 |
| 6778 | NIRCam observations of a star forming nebula | Macarena Garcia Marin | NIRCam | 7.0 | 3 |
| 6777 | Finding Black Holes through Gravitational Microlensing | Jessica Lu | NIRCam | 4.1 | 3 |
| 6742 | The evolving activity drivers in a newly discovered distant comet | Colin Snodgrass | NIRSpec | 4.0 | 3 |
| 6716 | Observing Molecule and Dust Formation in the Nearby SN 2024ggi | Chris Ashall | NIRSpec | 4.4 | 3 |
| 6714 | The evolving activity drivers in a newly discovered distant comet | Colin Snodgrass | NIRSpec | 5.7 | 2 |
| 6678 | A crucial piece of the puzzle: completing the panchromatic view of a nearby young SN with JWST observations | Rubina Kotak | MIRI | 6.6 | 2 |
| 6677 | Observing Molecule and Dust Formation in the Nearby SN 2024ggi | Chris Ashall | MIRI NIRSpec |
1.9 | 2 |
| 6659 | Dust to Dust: Probing the Survival of Cold Dust, New Hot Dust Formation, and Mass-Loss History of the Nearest Type Ibn Supernova | Kirsty Taggart | MIRI | 6.3 | 2 |
| 6595 | Giant in the Infant Universe: Identification of A Record-breaking Strongly-lensed (Ancestor of) Extremely Massive Quiescent Galaxy | Mingyang Zhuang | MIRI NIRSpec |
5.0 | 2 |
| 6591 | Cracking the Cosmic Calcium Conundrum: Discovering the origin of Ca-rich transient SN 2024uj with late-time infrared spectroscopy | Lindsey Kwok | MIRI NIRSpec |
8.0 | 2 |
| 6585 | The High-z Menagerie: A Rare Chance to Study the Early and Exotic Transient Universe | David Coulter | NIRCam NIRSpec |
9.2 | 2 |
| 6565 | Narrow and broadband imaging of an edge on galaxy | Macarena Garcia Marin | MIRI NIRCam |
19.2 | 2 |
| 6564 | Imaging of Interacting Galaxies | Macarena Garcia Marin | MIRI NIRCam |
17.5 | 2 |
| 6558 | Multi-band imaging of protostellar jet | Macarena Garcia Marin | MIRI NIRCam |
7.4 | 2 |
| 6557 | Imaging dust knots in a planetary nebula | Macarena Garcia Marin | NIRCam | 7.7 | 2 |
| 6556 | Dust distribution in a colliding galaxy system | Macarena Garcia Marin | MIRI NIRCam |
13.9 | 2 |
| 6555 | Star-formation in a nearby galaxy | Macarena Garcia Marin | MIRI NIRCam |
7.5 | 2 |
| 6554 | Infrared imaging of bipolar features in planetary nebula | Macarena Garcia Marin | MIRI NIRCam |
8.6 | 2 |
| 6553 | MIRI imaging of merger-driven features in galaxy pair | Macarena Garcia Marin | MIRI | 11.0 | 2 |
| 6550 | When worlds collide: formation and evolution of a synestia | Richelle van Capelleveen | MIRI NIRSpec |
8.6 | 2 |
| 6549 | Lensed Supernova Encore at z=2! The First Galaxy to Host Two Multiply-Imaged Supernovae | Justin Pierel | NIRCam | 7.3 | 2 |
| 6543 | Stellar Activity Characterization of LHS 1140 - Is LHS 1140 b a Mini-Neptune or a Water World? | Charles Cadieux | NIRISS | 15.8 | 2 |
| 6541 | JWST NIRSpec/NIRCam Follow-Up of the High-Redshift Transients Discovered in the GOODS-S JADES-Deep Field | Eiichi Egami | NIRCam NIRSpec |
17.7 | 2 |
| 4621 | Time-sensitive observations of Chiron: a unique active Centaur beyond 15 AU | Ian Wong | NIRSpec | 4.0 | 2 |
| 4575 | Dust Our Luck – Measuring Molecule and Dust Formation in M101’s Hydrogen-rich SN 2023ixf | Chris Ashall | MIRI NIRSpec |
4.4 | 2 |
| 4558 | Establishing the Formation of AF Lep b with NIRCam: The Lowest-Mass Imaged Exoplanet with a Dynamical Mass | Kyle Franson | NIRCam | 6.5 | 2 |
| 4557 | JWST/NIRSpec confirmation of z~3 transients found by JWST/NIRCam | Haojing Yan | NIRSpec | 10.8 | 2 |
| 4554 | Revealing the progenitor of the dirty fireball gamma-ray burst AT 2023lcr through its supernova component | Antonio Martin-Carrillo | NIRCam NIRSpec |
4.7 | 2 |
| 4520 | Near- and Mid-IR Observations to Probe Dust Formation in the Remarkably Nearby Stripped-Envelope Supernova 2023dbc | Melissa Shahbandeh | MIRI NIRSpec |
6.8 | 2 |
| 4522 | Dust Our Luck – Measuring Molecule and Dust Formation in M101’s Hydrogen-rich SN 2023ixf | Chris Ashall | MIRI NIRSpec |
3.5 | 1 |
| 4446 | SN H0pe: Independent Measurement of H0 by the Time Delay of a Multiply-imaged Supernova | Brenda Frye | NIRCam NIRSpec |
10.5 | 1 |
| 4445 | Revealing the nature of the exceptional GRB 230307A: nearby nucleosynthesis or a primordial explosion? | Andrew Levan | NIRCam NIRSpec |
4.9 | 1 |
| 4436 | Near- and Mid-IR Observations to Probe Dust Formation in the Remarkably Nearby Stripped-Envelope Supernova 2023dbc | Melissa Shahbandeh | MIRI NIRSpec |
1.8 | 1 |
| The late time spectrum of a kilonova in the exceptionally bright GRB 230307A | Andrew Levan | NIRCam NIRSpec |
4.9 | 1 | |
| The impact of smaller accretion bursts on the planet-forming material in the disk of a young eruptive star | Peter Abraham | MIRI | 2.2 | 1 | |
| 4426 | An unprecedented spatially resolved analysis of the brightest galaxy at z>10 in GOODS-N | Roberto Maiolino | NIRSpec | 17.7 | 1 |
| 2787 | A sensitive search for rings and small moons in the Martian system using JWST | Geronimo Villanueva | NIRCam | 5.7 | 1 |
| 2784 | Late Time Observations of GRB 221009A: The First Search for r-Process Nucleosynthesis in a Collapsar | Peter Blanchard | NIRCam NIRSpec |
11.2 | 1 |
| 2783 | MIRI LRS follow up on SO2 detection in WASP-39b | Diana Powell | MIRI | 10.7 | 1 |
| 2782 |
Heavy element formation in the brightest gamma-ray burst of all time |
Andrew Levan |
MIRI NIRSpec |
2.2 | 1 |
| 2767 | Imaging and Spectroscopy of Three Highly Magnified Images of a Supernova at z=1.5 | Patrick Kelly | NIRCam NIRSpec |
10.3 | 1 |
| 2756 | Imaging and Spectroscopic Follow-up of a Supernova at Redshift z=3.47 | Wenlei Chen | NIRCam NIRSpec |
9.4 |
1 |
| 2754 | Unique Constraints on Early Dust Growth in Core-Collapse Supernovae | Justin Pierel | MIRI | 5.6 | 1 |
| 2750 |
Spectroscopic follow-up of ultra-high-z candidates in CEERS: Characterizing true z > 12 galaxies and z~4-7 interlopers in preparation for JWST Cycle 2 |
Pablo Arrabal Haro | NIRSpec | 8.0 | 1 |
| The Volatile Content of Oort Cloud Comet C/2014 UN271 | Bryce Bolin | NIRSpec |
4.4 |
1 | |
|
JWST Cycle 1 Outreach Campaign |
Klaus Pontoppidan |
MIRI NIRCam |
45.4 |
1 |
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