Fe XVII 15.014 Angstroms
Nonporous models
Note: Both MEG and HEG are being fit simultaneously
Continuum fit on 14.85:14.90. For n=2, bestfit norm=1.71e3. The 68% confidence limits on the normalization are approx. +/0.5e3. And the best fit is formally a good fit.
Here are the 68%, 90%, and 95% joint confidence limits on taustar and R_{o} based on fitting the MEG and HEG data together. The filled circle represents the bestfit model, shown as the red histograms on the above two plots.
New (2Jan09): note that we've now begun plotting these 2D confidence contour plots in terms of R_{o} rather than u_{o}.
The literature massloss rate implies a fiducial optical depth at the wavelength of this line of about taustar=5.30 (using kappa = 37 cm^{2} g^{1}). From the confidence limit contour plot we can see that such a high value is ruled out. If we force a nonporous model to have this optical depth value, here is the bestfit model.
This fit is ruled out only at 97% confidence, formally. But the fit is clearly poor. And the low taustar fit  the global bestfit model  shown at the top of this page is preferred over this model with an even higher level of confidence (>99.99%), with ΔC > 64. Here are the two models plotted together:

Next, we fit isotropic porosity models to the data. And after that, anisotropic porosity models.
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last modified: 13 February 2009