TAURUS-2 is described
in more detail in Section . There is a choice of either an f/2.11
or an f/3.96 camera in TAURUS-2, giving a scale and field-size summarised
in Table
. Please note that TAURUS-2 was not designed to do high
speed photometry, and so a fast shutter is not available for timing
exposures. In general exposure times of <10 sec should be
avoided. This can be especially important to bear in mind when selecting
standard stars.
In addition to the facilities
provided by the Cassegrain A&G unit described in Section ,
the following are provided:
The wheel in the focal plane of the telescope takes up to 8 filters, each of which can be up to 125 mm in diameter. Note that small filters placed in the telescope focal plane may restrict the field of view, and in particular the 50 mm square filters, which are standard on the INT and JKT, will restrict the field available with TAURUS-2 to less than 3.76 arcmin.
The focal plane filter wheel is tiltable, allowing the central wavelength
of the filter to be varied (see Section .
The filter wheel in the collimated beam takes up to 8 filters, each of
which can be up to 76 mm in diameter. Note that the diameter of the
collimated beam is about 68 mm (see Section ), so that filters smaller
than this will cause
vignetting when placed in the collimated beam. In particular, this will
be the case for the 50 mm square filters used on the INT and JKT.
Appendix summarises the larger filters available
specifically for TAURUS-2 observations.