propagating atomic uncertainties into data analysis

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propagating atomic uncertainties into data
analysis
Kang et al., 2004, XDAP fitting DEMs to
high-resolution Chandra and EUVE grating
spectra wavelength errors, missing lines
correlated uncertainties (via MCMC) pre-compute
tables of plausible ion balance
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DEM reconstruction cannot be a black box
fast, simple, robust pick one smoothing a
necessary evil error bars.. bands.. bundles..
ropes astrophysical limitations changing
densities and abundances flows and
non-equilibrium ionization line
opacities atomic data errors
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DEM reconstruction cannot be a black box
fast, simple, robust pick one smoothing a
necessary evil error bars.. bands.. bundles..
ropes astrophysical limitations changing
densities and abundances flows and
non-equilibrium ionization line
opacities atomic data errors
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coronal building blocks
 moss DEM Fletcher de Pontieu 1999 Lin et
al. 2006 Sun as a star stars as the Sun the
Capella spike at logT6.8
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DEM challenge lessons learned
MCMC_DEM in PINTofALE incorrect by 3x
always check for stability of the solution
watch out for artefacts next to sharp edges
data can be too good proportionately
more difficult to get out of local minima
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