Hi All,

I see that the final image(s) produced by ISIS appear to be normalized. I see the Y scale centers around the number 1, and I also see in the log that there is a line indicating the normalized area. I have seen other spectra where the Y axis is in ADUs. So my questions are these:

1. Is the final spectrum actually normalized ( Since there is a Scaling Profile Spectral region in the Settings page, I am assuming it is).

2. If the spectrum is normalized, can you please tell me why this is preferable to outputting a spectrum that is not normalized? Are there advantages or disadvantages to normalize or not normalize?

3. I ask the number 2 question because there is a button on the profile page to Normalize the spectrum. If ISIS does normalize the final spectrum, why is there a Normalize button.

4. Is there a way in ISIS to choose whether to normalize or not normalize?

Cheers,

Keith Graham