Aneta Siemiginowska

I would say that Sherpa should not allow user to update the channels with quality 1 and 5, and go with this solution: > "well, you need to edit the...

We should make a change from `chi2gehrels` to `chi2datavar` for 4.9.

Given issues with `chi2datavar` I suggest that we set the default statistics in sherpa to `cstat` and the method to `simplex` for 4.9 release.

`chi2geherls` will work in the sense that the user does not see any failure of the code, but the resulting parameters are often biased, even for the data with high...

@DougBurke thanks for the link to the test script. The idea for testing in ciao and in local branch on the csc data is great. I will run some tests...

@DougBurke this is a good check. I'm not sure that this is the right place for the discussion of grouping the background, as we have a separate Google Doc with...

@DougBurke I agree, If the background is present then the user should not be using this statistics without background subtraction, so we should issue a warning. I would not prevent...

I would not give this a very high priority. Perhaps we should make a comment in the documentation for this statistics that it should be applied to the background subtracted...

@DougBurke this is ok. Each order should have a separate response. I did not have a chance to try it.

Is there a way to include a meaningful message in the warning to say what needs to be done in order to display the plots on the screen. For example...