1.5mRC Decker

The dimensions of the decker plate which defines the slit length are given in Table 1. With the decker in the open position, the slit illuminates $\sim 360$ rows on the Loral 1K CCD. There is some vignetting at the ends of the slit in the open position.

Table 1: Decker Plate Dimensions for the 1.5-Meter Cassegrain Spectrograph
  Stellar Window
Decker At Slit
Number    
  (mm) (arcseconds)
1 0.90 16
2 1.55 28
3 2.20 40
4 3.00 54
5 3.75 68
6 4.50 81
7 6.00 109
8 8.90 161
9 11.90 215
10 17.75 321
open 25.40 460