Fe XVII 16.780 Angstroms

Non-porous models

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.

Continuum fit on 16.3:16.6 and 16.86:16.90. View the spectral region near the line: MEG. For 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.

Fe XVII 16.780: non-porous MEG [16.64:16.90], λo = 16.780
powerlaw continuum, n=2; norm=2.20e-3
taustar=2.86   +/- (2.15:3.24)
uo=0.99   +/- (0.616:0.99)
norm=2.31e-4 +/- (2.19e-4:2.50e-4)
rejection probability = 22% (C=102.88; N=104)

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

Fe XVII 16.780: joint uo taustar constraints using MEG data

Note that normal values of uo (~0.65) are allowed at even the 68% confidence level.


Next, we fit isotropic porosity models to the data. And after that, anisotropic porosity models.


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last modified: 23 July 2008