EFOSC2 is a focal reducer multi-mode instrument using multi-layer coated all-transmission optics. It is permanently mounted at the Nasmyth B focus of the 3.58m New Technology Telescope. The wavelength range of operation is between 305nm and 1100nm. The field of view is 4.1'x4.1'.
The following observing modes are available (links take you to detailed instructions for visitors for each mode):
| EFOSC2 observing modes: | ||
|---|---|---|
| IMA | imaging | |
| MOS | multi-object spectroscopy (masks) | |
| LSS | longslit spectroscopy | |
| IPOL | imaging polarimetry | |
| SPOL | spectropolarimetry | |
| COR | coronography | |
The NTT is equipped with a differential tracking, so all of the observing modes above can in principle be used on moving targets as well. Note however that differential guiding is not currently possible on the NTT.
The main instrument optics consists of
The CCD#40 is a Loral/Lesser, thinned, AR coated, UV flooded, MPP chip controlled by ESO-FIERA. It's size is 2048 x 2048 pixel, the pixel size being 15mux15mu, or 0.12"x0.12" on the sky. The 2x2 binned pixels of the default CCD readout modes will be projected to 0".24 on the sky.
Four readout modes are offered for scientific purpose:
For more detailed information, please consult the EFOSC2 manual and look at the detailed pages under Instrument Description on the left hand navigation window.