Table 5: Observed and predicted bow shock luminosities and line ratios.

Line		 Observed$^{\ast}$ Dereddened $^{\dagger}$ J-type
      Model
NK 1      

H2 (1,0) S(1)		 8.0 $\times $ 10-4 2.0 $\times $ 10-3 2.0 $\times $ 10-3
H2 (2,1) S(1) 8.1 $\times $ 10-5 2.0 $\times $ 10-4 2.3 $\times $ 10-4
H2 (3,2) S(3) - - 6.0 $\times $ 10-5
${\rm [Fe~II]}$   4D7/2 - 4F9/2 1.2 $\times $ 10-4 5.3 $\times $ 10-4 3.1 $\times $ 10-4
(2,1)/(1,0)  ratio 0.10   (0.02) 0.10   (0.02) 0.11
${\rm [Fe~II]/(1,0)}$   ratio 0.15   (0.02) 0.27   (0.04) 0.15
SK 1      

H2 (1,0) S(1)		 9.8 $\times $ 10-4 3.4 $\times $ 10-3 2.0 $\times $ 10-3
H2 (2,1) S(1) 1.5 $\times $ 10-4 5.2 $\times $ 10-4 2.3 $\times $ 10-4
H2 (3,2) S(3) 3.4 $\times $ 10-5 8.4 $\times $ 10-5 6.0 $\times $ 10-5
${\rm [Fe~II]}$   4D7/2 - 4F9/2 6.6 $\times $ 10-5 4.5 $\times $ 10-4 3.1 $\times $ 10-4
(2,1)/(1,0)  ratio 0.16   (0.02) 0.16   (0.02) 0.11
${\rm [Fe~II]/(1,0)}$   ratio 0.07   (0.02) 0.13   (0.04) 0.15
$\ast$ The 3$\sigma$ detection limits are 5.1 $\times $ 10 $^{-5}~L_{\odot}$ and 6.4 $\times $ 10-5 for NK 1 and SK 1 respectively. Luminosities are expressed in units of $L_{\odot}$ and a distance of 460 pc is adopted.
$\dagger$ Luminosities have been dereddened using K-band extinctions of 1.0 and 1.4 mag for NK 1 and SK 1. H-band extinctions of 1.6 and 2.1 mag were used to deredden the [Fe II] luminosities (using $A_{\rm H}$ = 1.56 $\times $ AK from Rieke & Lebofsky (1985)).


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