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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
12496 NIRcam and MIRI observtions of a radio galaxy Macarena Garcia Marin

NIRCam

MIRI

 44.1 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

 13.8 4
12488 Testing the volatile variability of fragmenting Oort cloud comet C/2025 K1 ATLAS Bryce Bolin

NIRSpec
NIRCam

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		 8.5 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		 5.1 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

4434

 The late time spectrum of a kilonova in the exceptionally bright GRB 230307A Andrew Levan NIRCam
NIRSpec		 4.9 1

4427

 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

2747

 The Volatile Content of Oort Cloud Comet C/2014 UN271 Bryce Bolin NIRSpec

4.4

 1

2739

JWST Cycle 1 Outreach Campaign

 Klaus Pontoppidan

MIRI

NIRCam

45.4

 1

 

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