Approved DDT Proposals
The table below lists proposals approved for Director's Discretionary Time (DDT) on the VLA and VLBA. The following is provided for each approved proposal: PI name, proposal ID, proposal title, date approved, maximum hours approved, and proprietary period in months.
For an approved DDT proposal, the Proposal Finder Tool will have access to its authors, title, abstract, and approved hours
| PI | ID | Title |
Date M/D/Y |
Hours |
Proprietary Months |
|---|---|---|---|---|---|
| Tao An | VLA/25B-403 | ultra-long GRB 251129A: central-engine shutdown or external energy injection | 12/11/2025 | 4.5 | 6 |
| Dejan Urosevic | VLA/25B-401 | Radio continuum emission of non-radiative filaments in Cygnus Loop - v2 | 12/04/2025 | 17 | 6 |
| Lorena Hernandez-Garcia | VLA/25B-390 | Continued VLA monitoring of the nuclear transient AT20201hdr | 11/05/2025 | 7 | 6 |
| Poonam Chandra | VLA/25B-389 | Searching for radio emission from candidate supernovae for high energy neutrinos | 10/31/2025 | 1.42 | 6 |
| Dana Baylis-Aguirre | VLBA/25B-387 | Exploring the dynamic inner circumstellar environment of Mira variable, V CVn | 10/24/2025 | 1 | 6 |
| Adam Lanman | VLA/25B-384 | Localizing the Low-DM FRB 20250906A with realfast | 10/14/2025 | 4 | 6 |
| Yi Feng | VLA/25B-378 | Revealing the nature of the persistent radion source FRB 20240114A | 09/13/2025 | 3 | 6 |
| Adam Deller | VLA/25B-372 | Confirming the JWST-identified host galaxy of FRB 20210912A | 08/26/2025 | 0.5 | 6 |
| Anna Ho | VLA/25B-366 | SN2025mkn: A Likely Lensed Fast Transient at High Redshift | 08/13/2025 | 2.5 | 6 |
| Matteo Fanelli | VLA/25A-505 | The duty cycle of restarted giant radio galaxies: a continuation | 07/30/2025 | 8 | 6 |
| Silvia Belladitta | VLA/25A-499 | Pushing the quasar redshift frontier with Euclid and VLA | 07/18/2025 | 11.6 | 6 |
| Pikky Atri | VLBA/25A-501 | Establishing the Galactic or extragalactic nature of a new, curious transient | 07/14/2025 | 14 | 6 |
| Thomas Russell | VLA/25A-496 | Measuring the jet speed of GS 1826-238 with type-I X-ray bursts | 07/09/2025 | 7.5 | 6 |
| Wouter Vlemmings | VLA/25A-494 | Confirming unexpected temperatures in the outer atmosphere of R Leo | 07/01/2025 | 2.5 | 6 |
| Noa Grollimund | VLA/25A-491 | Superluminal jets from the new transient MAXI J1744-294? | 06/26/2025 | 4.0 | 6 |
| Raphael Baer-Way | VLA/25A-488 | VLA followup of the intriguing X-ray bright calcium-strong transient SN 2025coe | 06/13/2025 | 1.5 | 6 |
| Itai Sfaradi | VLA/25A-483 | The peculiar radio emission from the first radio bright off-nuclear TDE | 05/28/2025 | 2.0 | 6 |
| Myles Sherman | VLA/25A-481 | Confirming Radio Detection of Magnetar SGR J0418+5729 | 05/26/2025 | 1.4 | 6 |
| Joseph Michail | VLBA/25A-480 | Localizing and Classifying the Structure of MAXI J1744-292 with the VLBA | 05/22/2025 | 8.0 | 6 |
| Joseph Michail | VLA/25A-476 | Monitoring the Radio SED of a New Transient within 20" of SgrA* | 05/21/2025 | 6.72 | 6 |
| Murray Brightman | VLA/25A-475 | Radio follow-up of a fast X-ray transient candidate discovered by NuSTAR | 05/19/2025 | 1.5 | 6 |
| Michael Rugel | VLA/25A-473 | Deep OH absorption observations in the Galactic plane | 05/15/2025 | 16.0 | 6 |
| Megan Lewis | VLA/25A-471 | IRAS18199-1452 A Possible Water Fountain in a Nascent Pre-planetary Nebula | 05/13/2025 | 1.0 | 6 |
| Anna Ho | VLA/25A-470 | AT2025inl: A Candidate Relativistic Stellar Explosion | 05/09/2025 | 1.0 | 6 |
| Deanne Coppejans | VLA/25A-468 | Constraining the Mass-loss of the Closest Pair-Instability Supernova Candidate | 05/07/2025 | 8.5 | 6 |
| Tao An | VLA/25A-467 | Radio Follow-up of the Peculiar Fast X-ray Transient EP250427a | 05/01/2025 | 6.0 | 6 |
| Walter Golay | VLA/25A-460 | Radio Observations of a Pair-Instability Supernova | 04/16/2025 | 1.5 | 6 |
| Antonio Rodriguez | VLA/25A-452 | A 27-sec Spinning White Dwarf: Establishing a Class of Rapid Propellers | 04/10/2025 | 1.0 | 6 |
| Jesse Miller | VLA/25A-450 | Pathway to the Plane: A Pilot HI Study of VLASS Galactic Transient Candidates | 04/04/2025 | 4.0 | 6 |
| Tao An | VLA/25A-435 | VLA Study of the First Extragalactic FRB with an X-ray Counterpart |
04/03/2025 | 7.2 | 6 |
| Mattias Lazda | VLA/25A-434 | A search for incoherent radio emission in the field of a local Universe FRB |
04/03/2025 | 8.52 | 6 |
| Anna Ho | VLA/25A-429 | AT2025cez: A Candidate Relativistic Stellar Explosion | 03/25/2025 | 4.75 | 6 |
| Jian Jiang | VLA/25A-427 | Disclosing the Final Activities of Fast Blue Luminous Transients WFST0533buha | 03/21/2025 | 3.44 | 6 |
| Cuiyuan Dai | VLA/25A-421 | VLA Observations of the Radio Afterglow of a soft x-ray transient EP250302a |
03/06/2025 | 4.06 | 6 |
| Giulia Gianfagna | VLA/25A-419 | A collapsar origin for the X-ray transient EP241021a | 03/04/2025 | 2.5 | 6 |
| Collin Christy | VLA/24B-533 | Searching for Jet Signatures in the First Ic-BL SN Observed by JWST | 02/13/2025 | 2.0 | 6 |
| Arvind Balasubramanian | VLA/24B-529 | Understanding the emission mechanism of GRB250101A with radio observations | 02/10/2025 | 12.0 | 6 |
| Emmanuel Momjian | VLBA/24B-528 | Toward Direct Parsec-Scale Imaging of Extragalactic ISM | 02/04/2025 | 10.0 | 6 |
| Thushara G.S. Pillai | VLA/24B-527 | Highest Angular Resolution Follow Up Towards A Compact Source near Sgr A* | 01/31/2025 | 2.07 | 6 |
| Yash Bhusare | VLA/24B-525 | Exploring the Persistent Radio Source associated with FRB 20220912A with EVLA | 01/29/2025 | 5.5 | 6 |
| Emma Schwartzman | VLBA/24B-524 | VLBA Confirmation of the First Triple Radio AGN | 01/28/2025 | 10.0 | 6 |
| Bjorn Emonts | VLA/24B-522 | Core Analysis of the first Closed Angle Tailed Radio Source | 01/24/2025 | 0.6 | 6 |
| Yuanqi Liu | VLA/24B-520 | Radio follow-ups of GRB 250114A at a redshift of 4.73 | 01/22/2025 | 6.0 | 6 |
| Megan Lewis | VLA/24B-514 | DDT Filler: The enigmatic SiO maser spectrum of ad3a-09310 | 01/21/2025 | 0.5 | 6 |
| Yuanqi Liu | VLA/24B-510 | Extended Radio Monitoring of EP241217a | 01/01/2025 | 6.0 | 6 |
| Yuanqi Liu | VLA/24B-507 | Radio follow-ups of EP241217a at a redshift of 4.59 | 12/19/2024 | 6.0 | 6 |
| Luca Ighina | VLA/24B-504 | Illuminating the COSMOS: characterizing the radio jet of a z~8 AGN | 12/18/2024 | 4.5 | 6 |
| Raphael Baer-Way | VLA/24B-500 | VLA followup of the first radio-detected type Ibn Supernova 2023fyq | 12/13/2024 | 1.5 | 6 |
| Genevieve Schroeder | VLA/24B-499 | Confirming the Existence of an Off-Axis Jet in PTF10tqv, a Ic-BL SN | 12/11/2024 | 1.25 | 6 |
| James Rodi
|
VLA/24B-498 | VLA follow-up of the candidate magnetar giant flare GRB 241107A | 12/06/2024 | 6.0 | 6 |
|
Gokul Srinivasaragavan |
VLA/24B-497 | EP 241021A: An X-ray Transient Bridging the Gap Between GRBs and SNe | 12/05/2024 | 6.0 | 6 |
|
Ailing Wang |
VLA/24B-495 | Probing Super-Eddington Accretion in Mrk 1044 Triggered by X-ray Flares | 11/22/2024 | 4.66 | 6 |
|
Ailing Wang |
VLBA/24B-494 | Exploring Jet Activity Triggered by X-ray Flares in Mrk 1044 | 11/22/2024 | 12.0 | 6 |
|
Deepak Eappachen |
VLA/24B-492 | Unveiling the nature of Einstein-Probe-discovered Fast X-ray Transient EP241107a | 11/20/2024 | 1.0 | 6 |
|
Xinwen Shu |
VLBA/24B-491 | Mas-scale imaging of a candidate jetted TDE discovered by Einstein Probe | 11/19/2024 | 10.0 | 6 |
|
Yuri Kovalev |
VLBA/24B-490 | VLBA follow-up of the KM3NeT ultra high energy neutrino event | 11/15/2024 | 9.0 | 6 |
|
Tao An |
VLBA/24B-488 | Probing a New Accretion-Jet Regime in an Low-Luminosity Compact Object EP240425a | 11/14/2024 | 6.0 | 6 |
|
Xinwen Shu |
VLA/24B-487 | Radio properties of a candidate jetted TDE discovered by Einstein Probe | 11/04/2024 | 1.8 | 6 |
|
Keiichi Umetsu |
VLA/24B-483 | Unveiling Hidden Lenses: Strongly Lensed Radio Sources Behind Edge-on Galaxies | 10/25/2024 | 0.8 | 6 |
|
Daewon Kim |
VLBA/24B-482 | Tracing the ongoing high-energy activities of BLLac | 10/25/2024 | 18.0 | 6 |
|
Patrick Taylor |
VLBA/24B-481 | Space Research | 10/15/2024 | 27.0 | 6 |
|
Xinwen Shu |
VLA/24B-479 | Revealing unusual SED evolution from a relativistic TDE in a starforming galaxy | 10/10/2024 | 1.1 | 6 |
|
Yash Bhusare |
VLA/24B-477 | Exploring the Persistent Radio Source associated with FRB 20220912A with EVLA | 10/04/2024 | 4.0 | 6 |
|
Shobha Kumari |
VLA/24B-476 | Study the radio emission in Aql X-1 during the thermonuclear X-ray burst | 10/03/2024 | 1.0 | 6 |
|
Tatiana Rodriguez |
VLA/24B-473 | Follow-up to the serendipitous discovery of radio jet variation in G23.01-00.41 | 09/30/2024 | 4.5 | 6 |
| Gabriele Bruni
|
VLBA/24B-472 | Confirming the persistent radio source associated with FRB20240114A | 09/26/2024 | 12.0 | 6 |
|
Yuanqi Liu |
VLA/24B-471 | EP240913a: A Potential High-Redshift GRB or New Class of X-ray Transient | 09/20/2024 | 4.0 | 6 |
|
Lei Zhang |
VLA/24B-470 |
Localization of the first pulsar associated with the oldest open cluster |
09/24/2024 | 3.8 | 6 |
|
Francesco Carotenuto |
VLA/24B-469 |
Detecting relativistic discrete ejecta from a transitional millisecond pulsar |
09/13/2024 | 3.0 | 6 |
|
Xian Zhang |
VLA/24B-467 |
Follow-up Observations of the Radio Continuum Counterpart of FRB 20240114A |
09/16/2024 | 5.1 | 6 |
|
Rupak Roy |
VLA/24B-465 |
JVLA DDT observation of the radio counterpart of nuclear transient iPTF15dof |
09/11/2024 | 2.64 | 6 |
|
Joseph Michail |
VLA/24B-463 |
Concurrent Radio Coverage of 6 September 2024 Multiwavelength Campaign of Sgr A* |
09/05/2024 | 7.0 | 6 |
|
Lorant Sjouwerman |
VLA/24B-458 |
Best upper limit for Gaia BH3, with 33Msun the most massive stellar black hole. |
08/20/2024 | 50.0 | 6 |
|
Jean Somalwar |
VLA/24B-456 |
VLA Observations of the most extreme TDE or LFBOT |
08/15/2024 | 1.67 | 6 |
|
Nayana AJ |
VLA/24A-498 |
A deep search for radio emission from Type-Ia SNe with MIR brightenings |
08/08/2024 | 2.0 | 6 |
|
Aiyuan Yang |
VLA/24A-497 |
A wide-band study of radio flux variability in UCHII regions |
08/06/2024 | 1.6 | 6 |
|
Sabyasachi Pal |
VLA/24A-496 |
Disk-jet Connection in the X-ray Pulsar XTE J1946+274 |
08/02/2024 | 1.0 | 6 |
|
Vikram Ravi |
VLBA/24A-495 |
AT2024kmq: HSA observations of a TDE with evidence of an off-axis jet |
07/31/2024 | 3.3 | 6 |
|
Yuhan Yao |
VLA/24A-494 |
AT2024kmq: A radio and X-ray loud TDE with evidence of an off-axis jet |
07/29/2024 | 3.0 | 6 |
|
Natasha Hurley-Walker |
VLA/24A-493 |
Tracking a long-period radio transient "around the world" |
07/26/2024 | 8.17 | 6 |
|
Ailing Wang |
VLA/24A-491 |
EP240425a - a new type of X-ray binaries? |
07/23/2024 | 7.17 | 6 |
|
Eileen Meyer |
VLA/24A-490 |
A Complete Spectrum of the late-time radio flare of 1ES 1927+654 |
07/17/2024 | 3.76 | 6 |
|
Xian Zhang |
VLA/24A-488 |
Multi-band VLA observations of a hyperactive repeating FRB 20240114A |
07/11/2024 | 3.2 | 6 |
|
Yuhan Yao |
VLA/24A-487 |
Radio Observations of a TDE with Luminous and Variable Hard X-ray Emission |
07/08/2024 | 5.45 | 6 |
|
Casey Law |
VLA/24A-486 |
Localizing the Hyperactive Repeating FRB 20240209A |
06/28/2024 | 4.0 | 6 |
|
Yanan Wang |
VLA/24A-485 |
Covariation between accretion and ejection processes in a TDE |
06/28/2024 | 3.0 | 6 |
|
Poonam Chandra |
VLA/24A-483 |
Radio follow up observations of SN 2024ggi in NGC3621 |
06/24/2024 | 8.0 | 6 |
|
Lorant Sjouwerman |
VLA/24A-482 |
Is Gaia BH3, with 33 Msun, (or it's companion) a radio source? |
06/11/2024 | 1.0 | 6 |
|
Yanan Wang |
VLBA/24A-480 |
Imaging a flaring nuclear transient with VLBA |
06/06/2024 | 10 | 6 |
|
Harsh Kumar |
VLA/24A-479 |
VLA Exploratory Observations of a high redshift luminous TDE |
06/04/2024 | 3.0 | 6 |
|
Ran Wang |
VLA/24A-478 |
Radio Variability in the Most Massive and Radio-quiet Quasar at z=6.3 |
06/03/2024 | 4.33 | 6 |
|
Kevin Ortiz Ceballos |
VLA/24A-477 |
Exploring Star-Planet Interaction in a New Nearby Exoplanet System |
05/30/2024 | 2.0 | 6 |
|
Maria Cristina Baglio |
VLA/24A-476 |
Probing the emission of Transitional Pulsars using radio-to-X-rays polarimetry |
05/29/2024 | 4.0 | 6 |
|
Sara Elisa Motta |
VLA/24A-474 |
The changing-angle jets in GRS 1915+105 |
05/23/2024 | 2.0 | 6 |
|
Chenoa Tremblay |
VLA/24A-473 | Searching for Technosignatures toward potential Dyson Spheres
|
05/20/2024 | 2.0 | 6 |
|
Yuanqi Liu |
VLA/24A-472 |
EP240425a - a new type of X-ray binaries? |
05/16/2024 | 2.5 | 6 |
| VLBA/24A-471 | 4 | 6 | |||
|
Andrew Hughes |
VLA/24A-469 |
MULTI-WAVELENGTH POLARIMETRY TO PROBE THE EVOLVING GEOMETRY OF CYG X-1 |
05/06/2024 | 3.75 | 6 |
|
Yanan Wang |
VLA/24A-466> |
Constraining the period of radio flares in a nuclear transient with the VLA |
04/23/2024 | 5.0 | 6 |
|
Poonam Chandra |
VLA/24A-462 |
SN 2024ggi: A nearby supernova at 7 Mpc in NGC3621 |
04/18/2024 | 3.0 | 6 |
|
Nathan Roth |
VLA/24A-458 |
Imaging NH3 in Comet 12P: Coordinated VLA/IRTF/SMA/ALMA Large Program Studies |
04/03/2024 | 9.0 | 6 |
|
Xinwen Shu |
VLA/24A-457 |
Radio emission of a peculiar months-long sustained X-ray flare discovered by EP |
04/01/2024 | 1.0 | 6 |
|
Joe Bright |
VLA/24A-455 |
Measuring the Spectrum of the First Radio Loud Fast X-ray Transient |
03/25/2024 | 4.26 | 6 |
|
Eileen Meyer |
VLBA/24A-454 |
VLBA Observations of TeV-flaring Radio Galaxy IC 310 |
03/21/2024 | 4.0 | 6 |
|
Anna Ho |
VLA/24A-453 |
VLA Characterization of Einstein Probe Fast X-ray Transients |
03/25/2024 | 2.0 | 6 |
|
Eileen Meyer |
VLA/24A-451 |
VLA Observations of TeV-flaring Radio Galaxy IC 310 |
03/22/2024 | 1.25 | 6 |
|
Farhad Yusef-Zadeh |
VLA/24A-447 |
Simultaneous VLA and JWST Monitoring of Sgr A* on March 21, 2024 |
03/19/2024 | 4.75 | 6 |
|
Yanan Wang |
VLA/24A-442 |
Characterizing the accretion-ejection activities in a nuclear transient with VLA |
03/04/2024 | 5.0 | 6 |
|
James Leung |
VLBA/24A-441 |
High-resolution imaging of late-time radio rebrightening in SN 2022xxf |
03/01/2024 | 30.0 | 6 |
| Anna Ho | VLA/24A-439 |
Search for a radio counterpart to X-ray transient EPW20240219aa |
02/23/2024 | 2.0 | 6 |
| Gabriele Bruni | VLA/24A-435 |
The multiple activity phases of the giant radio galaxy B2 1144+35B |
02/28/2024 | 8.0 | 6 |
| Yanan Wang | VLA/24A-434 |
AT 2019avd: Tracking the evolution of its long-lived radio flare |
02/26/2024 | 2.0 | 6 |
| Adam Deller | VLBA/24A-431 |
Localising a newly-discovered 20-Jy pulsar with a 44 minute period |
02/12/2024 | 10.0 | 6 |
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