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3.1 Data Format

Figure 2 shows a typical image using a multi-slit. The exposure time is 3000 seconds with the Cryogenic Camera, grism 650, and the Ford-Loral 800x1200 CCD. Red is on the left. At least five object spectra are visible superimposed on the night sky spectrum. Figure 3 shows the typical night sky spectrum from a single row on the CCD centered in the topmost slitlet of Figure 2. The bias level is 410 ADU.

  
Figure 2: Typical Multi-Slit Image

  
Figure 3: The Night Sky Spectrum


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Next: Outline of Reducing Multi-Slit Data
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Updated 16Feb1996