DATABASE OF TECHNICAL DATA
The list of instruments 'available' for DRM simulations and their parameters were never strictly defined. Rather, it is assumed that the instrumentation suite of the E-ELT will be similar to the set of phase A instrumentation studies. In other words, simulations should assume an instrument that is similar to one of the phase A concept studies.
The following table provides a list of 'virtual' instruments that served as a starting point for the DRM during its early phase.
|AO mode||Field of view and sampling||Comments|
|Diffraction Limited Imager (DLI)||0.7–2.5||LTAO or MCAO||
Desired: up to 2'×2' FoV with 10 mas/pix.|
Lower λ limit set by detector.
|Single field IFU||0.5–2.5 split between two arms||LTAO or MCAO||
Lower λ limit set by trade-off between resolution, spectral
coverage in one shot and efficiency.|
R=3000–20000. R=3000 covers at least one band (J,H,K). Coverage in one shot to be studied for R=20000.
|Multi-field IFU||0.7–2.5||MOAO, possibly GLAO or MCAO||
Circular patrol field: 5' diameter|
Individual IFUs: ~1.3"×1.3"
Lower λ limit set by detector.|
R=3000 (covering at least one band in one shot).
Multiplex >= 20.
Desirability of a larger patrol field up to D=8' to be justified.
|XAO imager and IFU||0.6–1.8 (goal: 2.4)||XAO, 200×200 actuators||
Nyquist sampling of diffraction limited core at 600 nm (TBD)
Polarimetry + classical imaging (600–900 nm).
High resolution spectroscopy TBD.
|Ultra-stable high resolution spectrograph (HRS)||0.38–0.7||Seeing limited||1"×1"||
Full spectral coverage in 1 shot.
3–5 μm: 9 mas/pix
5–25 μm: 17 mas/pix
|Narrow and broad band filters.|
sampling at 1.5×FWHM
R=500, one band in one shot.|
R=3000, spectral coverage in one shot = λc/3.
R=50000, spectral coverage in one shot = λc/50.
Project Science Team
Phase B (2006 – 2011)