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The FORS1 and FORS2 FOcal Reducer/low dispersion
Spectrographs are expected to be something like the workhorses of the VLT
since they will offer a variety of observing modes in the visual and near
ultraviolet wavelength range, namely
- direct imaging (2 image scales)
- low dispersion grism spectroscopy
- multi object spectroscopy (MOS; up to 19 objects)
- polarimetry (FORS1 only).
These modes can be combined e.g. to allow imaging polarimetry or
spectropolarimetry. In addition, a mode offering higher dispersion
(possibly up to ~5000) is envisaged for FORS2 which will therefore
not be equipped with polarimetric optics. An overview of the FORS project
can be found in [1]. A more comprehensive description of the
expected instrument performance is given in [2] and
[5] and more technical descriptions in [3] and [4].
Gero Rupprecht
Mon Jul 3 17:01:44 MET DST 1995