title test ots, inward fractions for pure hydrogen, open geo, filling factor
c
c commands controlling continuum =========
ionization -2
blackbody 40000
c
c commands for density & abundances =========
hden 5
init file "honly.ini"  
c
c commands controlling geometry  =========
stop efrac 0.05 %stop when 5 percent ionized 
constant temper 7500
filling factor 0.01
c
c other commands for details     =========
c must iterate to get inward line fractions, that are asserted below
iterate 
diffuse ots
c not iterating does not affect the solution
no level2
no induced processes (OK) 
c
c commands controlling output    =========
print line inward
save performance "h_otsopen.per"
save overview  "h_otsopen.ovr" last
save dr  "h_otsopen.dr" last
save monitors "h_otsopen.asr" last
save continuum "h_otsopen.con" last units angstrom
normalize to "Ca B" 4861 = 1 % normalize to exact result 
c
c commands giving the monitors    =========
c this is an open geometry, so do not expect H atom to exactly be case B
c due to Lyman line leakage.  we iterated, so have a good estimate of
c inward and outward fractions, which we test 
monitor line "Q(H)" 4861 >1.0  %
// 
// >>chng 08 apr 30, from 1.00 to 1.057 H, He topoff change
monitor line "Q(H)" 4861 1.057 %
// 
monitor line "Q(H)" 4861 < 1.1  %>but not a lot less
// 
//>>chnn 99jun26, error had been just under 2%, increased above it when optical
// depths of 2s and 2p were brought together, so increased error
// >>chng 08 apr 30, from 1 to 0.968 H, He topoff change
monitor line "H  1" 4861 = 0.968 error 0.03 %no surprise if not unity, since open
// 
// >>chng 08 apr 30, from 0.5 to 0.484 H, He topoff change
monitor line "Inwd" 4861 =0.484 error 0.03 %no surprise if not unity, since open
// 
monitor line "nFnu" 3588 = 18.0 error 0.02 %total Balmer continuum rel to h-beta
monitor line "InwT" 3588 = 9.00 error 0.02 %inward Balmer continuum rel to h-beta
// 
// >>chng 01 aug 23, from 18.26 to 18.633, 2x better continuum resolution
monitor line "BaC " 3646 = 18.633 error 0.02%residual Balmer continuum rel to h-b
// 
// >>chng 01 aug 23, from 9.07 to 9.319 2x better continuum resolution
monitor line "cout" 3646 = 9.319 error 0.02 %Balmer continuum rel to h-beta
// >>chng 01 aug 23, from 9.07 to 9.319 2x better continuum resolution
monitor line "cref" 3646 = 9.319 error 0.02 %Balmer continuum rel to h-beta
c h_otsopen.in
c class limit 
c ========================================
c 

This tests the total emission from a hydrogen Stromgren sphere
using the OTS approximation.  The conservation of the total number
of ionizing photons, and the emitted spectrum, are all checked.