Report on JWST Science Working Group
Tucson, 10-11 Feb 2004
1
Major news

No intention of accelerating the schedule. A list of items
suitable for risk reduction is being prepared by the JWST
project and were briefly discussed by the SWG.

Instruments ok.
2
JWST Field of View Layout
3
Major news

No intention of accelerating the schedule. A list of items
suitable for risk reduction is being prepared by the JWST
project.

Instruments ok.
4
Major news

No intention of accelerating the schedule. A list of items
suitable for risk reduction is being prepared by the JWST
project.

Instruments ok.

NIRCam : PIL is #1 risk reduction item. Tip-tilt focus mechanism.
5
NIRCam
OTE
Pupil
Imaging
Lens would
go here.
Pick-off mirror and
Tip-tilt-focus mech.
One half of NIRCam
6
Major news

No intention of accelerating the schedule. A list of items
suitable for risk reduction is being prepared by the JWST
project.

Instruments ok.


NIRCam : PIL is #1 risk reduction item. Tip-tilt focus mechanism.
NIRSpec: issue of pupil shear, potential loss of sensitivity in
NIRSpec 14-15% for 5% shear. Swiss company has produced
cryogenic mechanical slit selector (backup to MEMS)
 SWG will carry out trade study for 1/10/100 slits by June 04



MIRI: shear also an issue for coronagraph. Extra background at
>20mm.
FGS-TF: the SWG voted for uninterrupted wavelength coverage
up to 5 mm.
Survey Fields
7
Backgrounds – South galactic cap
Red = galactic dust, green
= ecliptic declination, blue
= selected fields (low dust,
no bright stars, galaxies,
radiosources)
8
Backgrounds – South galactic cap
Red = galactic dust, green
= ecliptic declination, blue
= existing fields (symbol
size proportional to quality)
9
Major news – cont’d


Discussion on need for some form of science parallels
Long discussion about HST-JWST Legacy
 JWST science may require visible imaging data
 How do we make sure those data are there when
needed?
 Full range of opinions (from do nothing to ask for a
fraction of HST time to be set aside).
 Too early for promising a JWST Quick look survey
 Agreement on doing nothing but informing the user
community about what JWST can and cannot do and
where in the sky

Write a JWST Mini-handbook (?)
10