Summary:

Thierry Fouchet and Imke de Pater are PIs of the ERS 1373 project (https://www.stsci.edu/jwst/science-execution/approved-programs/dd-ers/program-1373), which demonstrated the performance of the JWST telescope for typical observations. This ERS program was the only one dedicated to the solar system, and will target the Jupiter system, which presented a number of challenges for JWST, in terms of object brightness, angular size, photometric dynamics (both spectral and angular), non-sidereal tracking, etc...

In addition, Leigh Fletcher was in charge of JWST’s guaranteed time observations for observations of Saturn, Uranus & Neptune.

Around this team, and in particular thanks to a first workshop at the Jules Janssen center in 2022, we have also secured JWST observing time for cycles 2 and 3.

The aim of this workshop is to bring together the forty or so European and American scientists involved in these JWST observations, in order to
1. an update on data reduction, always difficult for bright objects such as giant planets
2. an update on JWST data analysis and results
3. Plan new observations (or proposals).

Scientific rationale :

The first team meeting was held at the Jules Janssen Center in October 2022 and was a great success. Some forty European and American researchers came to discuss and exchange views on our observations. We also defined a whole series of giant planet observation programs for future JWST cycles. This led to the acceptance of three projects led by team members, and several publications cited below.

Preliminary scientific program :

Monday: Data reduction - NIRSpec - MIRI/MRS - NIRCam - NIRISS/AMI

Tuesday: Jupiter system
Io: SO and SO2. Can we fit the bands ?
Ganymede : CO2 detection - Ice experiments
Jupiter : the south polar region - assimimation in the LMD Model
The H3+ observation program
The rings and moonlets

Wednesday : Saturn system
Titan NIRSpec observations
Saturn first NIRSpec observations
Can we still find something to discover the MIRI/MRS spectrum of Saturn.

Thursday : Uranus & Neptune
Results from NIRSpec and MIRI spectra

Friday : Plans for new proposals