title test optically thick model that extends to very low densities
init file="ism.ini"
hden -2 to the -2 power
sphere
ionization parameter 1
radius 10 13 // this will take density down to 1e-8, below stated limit
table agn
punch overview "lowden.ovr" last
assert line luminosity "totl" 4861 -19.740
assert temperature hydrogen 2 5.070
// model is highly spherical so these are not degenerate tests
// large error is to accomodate usual limited precision unix box
assert ionization hydrogen 1 volume -6.902 error 0.2
assert ionization hydrogen 1 radius -6.901
assert ionization helium 2 radius -4.807
assert ionization helium 2 volume -4.807
assert ionization Carbon 5  -1.647 
assert ionization Carbon 6  -0.532
assert ionization Carbon 7  -0.165
assert ionization Nitrogen 5 -3.796
assert ionization Nitrogen 6 -1.000
assert ionization Nitrogen 7 -0.330
assert ionization Nitrogen 8 -0.365
assert ionization Oxygen   5 -4.243
assert ionization Oxygen   6 -2.607
assert ionization Oxygen   7 -0.578
assert ionization Oxygen   8 -0.289
assert ionization Oxygen   9 -0.659


if outer radius increased by 2 dex problem with level3 will appear,
several li seq lines (OVI, NeVIII) will fluctuate when density about
1e-9