Table 1:

Far-infrared line flux ratios to the dereddened 5007 Å line as derived from different theoretical models and observations. (See text for details).

	, m	I/I(5007)
		I-H	BS-F	BS-DC	SD-200*	Observed**	SD-200*
[O IV]	25.91	0.0051	5.0	0.53	8.1	0.20	0.995
[O III]	51.81	0.031	1.34	0.72	0.67	0.25	0.999
[O I]	63.19	1.30	170	12	-	0.07	-
[O III]	88.36	0.028	0.22	0.11	0.55	0.10	0.999
[O I]	145.5	0.038	7.8	0.75	-	<0.0024	-

^* Derived in Sects. 2.1 and 2.2; ^** obtained in Sects. 3.1 and 3.2.1.
Notes: the last column lists contribution to the line flux in the SD-200 model arising from the photoionized region (PIR) before the shock. Derivation of the observed line flux ratio values is described in Sect. 3. The model-predicted [O I] lines are sensitive to the pre-shock ion number density in the model, see Sect. 4.1.2.