NASA's James Webb Space Telescope

JWST Users Committee (JSTUC)

The Space Telescope Science Institute (STScI) and the NASA Goddard Space Flight Center (GSFC) have established a joint James Webb Space Telescope (JWST) Users Committee (JSTUC) to provide user advice to the observatory as a whole. This provides a practical way of ensuring that the observatory operations proceed in a coordinated manner in order to maximize its scientific performance. 

The JSTUC welcomes the feedback from the astronomical community. Please email the JSTUC with any comments or questions.

JSTUC Charter

The JSTUC has a membership of 10-14 scientists, chosen jointly by the STScI Director and JWST Senior Project Scientist. The composition consists of representatives of the JWST General Observer community (GOs - 10 members) and members of the JWST Instrument Definition teams (GTOs – 4 members). GTOs will be represented on the JSTUC until the end of the period where their guaranteed observations are being executed, 30 months following the completion of commissioning. To allow for balance between continuity and new input, GO members will be appointed for a two-year term starting on the date of the first meeting attended. The Director, with the concurrence of the Senior Project Scientist, can ask a member to serve for one more year if mutually agreeable. At least two of the GO representatives will be astronomers from ESA nations and one will be an astronomer from Canada; those members will be appointed with ESA and CSA concurrence, respectively.

The JSTUC chair is a member of the JSTUC and will be nominated and appointed by the Director and Senior Project Scientist for a one year period. The Director, with concurrence of the Senior Project Scientist, can ask the JSTUC chair to serve for an additional one year period.

The JSTUC will meet at least twice a year, with the meetings generally hosted by STScI. The STScI Director, the Head of Science Mission Office, the NASA Senior Project Scientist, the NASA Program Scientist, ESA agency representative(s) and CSA agency representative(s) attend meetings of the group ex-officio (non-voting). The Head of the Science Mission Office or his/her designate is the Executive Secretary of the JSTUC.

The scope of the Users Committee is broad. The JSTUC can:

  • set its own agenda 
  • establish an ad-hoc subcommittee structure to perform in-depth studies of relevant subjects, if necessary
  • request support from STScI and GSFC for information and clarification

The product of the JWST Users Committee deliberations consists of written reports addressed to the STScI Director and the JWST Senior Project Scientist. These reports (together with a STScI or Project response, if warranted) are made available to Space Telescope Institute Council (STIC) and the Institute Visiting Committee, to NASA, ESA and CSA, and to the general community.​

The first JSTUC meeting was held at STScI on September 14 and 15, 2017.

Voting Committee Members

Name Institution Role
James Bullock University of California,  Irvine Chair
Kat Barger Texas Christian University  
Natalie Batalha UC Santa Cruz  
Saida Caballero-Nieves Florida Institute of Technology  
Stephane Charlot Institute d'Astrophysics, Paris NIRSpec team member
Duncan Farrah University of Hawaii  
Alistair Glasse Royal Observatory, Edinburgh MIRI team member
Tom Greene NASA-Ames NIRCam team member
Amanda Hendrix Planetary Science Institute  
Kelsey Johnson University of Virginia  
Heather Knutson California Institute of Technology  
David Lafreniere Universite de Montreal NIRISS team member
Mario Mateo University of Michigan  
Els Peeters University of Western Ontario   
Laura Pentericci INAF, Osservatorio Astronomica di Roma  
Johan Richard Universite de Lyon  
Tommaso Treu University of California, Los Angeles  

Non-voting Committee Members

Name Institution Role
Alessandra Aloisi STScI, Science Mission Office Ex officio
Jean Dupuis CSA CSA, ex officio
Pierre Ferruit ESTEC ESA, ex officio
John Mather GSFC, JWST Senior Project Scientist NASA, ex officio
Antonella Nota STScI ESA, ex officio
Neill Reid STScI, Science Mission Office Ex officio
Mike Ressler NASA-JPL MIRI team observer
Ken Sembach STScI, Director Ex officio
Eric Smith NASA, JWST Program Scientist NASA, ex officio

JSTUC Committee Meetings

Jul 2018
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The 3rd Meeting of the JWST Users Committee (JSTUC)

Science Meeting • July 27, 2018 • STScI Baltimore, MD

The 3rd meeting of the JSTUC was held via teleconference on July 27, 2018.  The committee was briefed on the: Project status following NASA’s decision to re-schedule for a March 30, 2021 launch Consequent impact on the Cycle 1 GO schedule and funding the Early Release Science programs Potential for providing additional capabilities in Cycle. More information is available on the JSTUC page. Meeting...

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May 2018
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The 2nd Meeting of the JWST Users Committee (JSTUC)

Committee Meeting • May 7 - 8, 2018 • STScI Baltimore, MD

The 2nd meeting of the JSTUC was held via teleconference on May 7-8, 2018.  The committee received various briefings related to the JWST program, as well as a first look at the JWST Cycle 1 User Survey results and an update on TESS. More information is available on the JSTUC page. Meeting Agenda Monday, May 7, 2018 Time Topic Presenter 11:00-11:30 Project Update Eric Smith 11:30-12:00 STScI SOC Update...

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Sep 2017
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The 1st Meeting of the JWST Users Committee (JSTUC)

Committee Meeting • September 14 - 15, 2017 • STScI Baltimore, MD

The 1st meeting of the JSTUC was held at STSCI on September 14-15, 2017. The committee was welcomed by the STScI Director, the JWST Senior Project Scientist, and representatives of the three space agencies. The committee received briefings on all aspects of the JWST program, including progress on the testing being completed at Johnson Space Center and the ongoing preparations at STScI and GSFC to support...

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