Fe XVII 16.780 Angstroms

Models with isotropic porosity

Note: We fit only the MEG data. There are 325 MEG counts in the spectral region we fit (and plot below). See the fitting log.

Same continuum fit as we used for the non-porous models: n=2, best-fit norm=2.20e-3. The 68% confidence limits on the normalization are +/- 2e-4. And the best fit is formally a good fit. View the spectral region near the line: MEG.

Fe XVII 16.780: isporous MEG [16.74:16.90], λo = 16.780
powerlaw continuum, n=2; norm=2.20e-3
hinf=2.20 +/- (0.80:3.85) and for 90%
      confidence, (0.00:5.0)

taustar=6.71   +/- (3.51:12.9)
uo=0.670   +/- (0.603:0.750)
norm=2.37e-4 +/- (2.19e-4:2.51e-4)
rejection probability = 19% (C=100.71; N=104)

Here are the 68%, 90%, and 95% joint confidence limits on hinf and taustar. The asterisk represents the best-fit model, shown as the red histograms on the above plot.

Fe XVII 16.780: isoporous joint hinf taustar constraints using MEG data

And here are the joint constraints on taustar and uo:

Fe XVII 16.780: joint uo taustar constraints using MEG data but with isoporosity

Compare this to the smaller confidence regions from the non-porous model fitting.


Next, we fit anisotropic porosity models to the data.


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last modified: 23 June 2008