next up previous contents
Next: JKT f/8 (WFCE and Up: Notes Previous: INT PRIME


The outer boundary of the guide probe field is set by the onset of vignetting (no vignetting at 10 arcmin radius; 50% at 11 arcmin, so rmax = 3.199810-3 rad) for the latter figure and the xy limits. The inner boundary of the field is set by the need to avoid obstructing the spectrograph slit with the guide probe, giving a rectangular excluded area. The full 4 arcmin length of the slit has been used in calculating the size of the inner boundary.

manuals store
Mon Mar 1 17:52:09 GMT 1999