Case study I - LSS survey at z=1
4m telescope, f/8
- 25 arcmin FOV slit spectrograph (achievable)
- 5 arcmin x 25 arcmin slit area
1 arcsec microslits, 50% detector for sky
- 750 objects / shot (c.f. 150 with 10 arcsec slits)
- z=0.7?1.3 at I=23 (~1000 targets/slit area)
- S/N = 8 in 16 hour exposure (including sky overhead)
10,000 objects ? 26 nights!
8m with 1.5 deg FOV
- e.g. SWIFT ? dedicated to multislit work
- Scaling ? 500,000 objects in 26 nights