Table 1: Physical parameters derived from the observed H2 line emission.
Parameter Knot A Knot B Knot C
  1-0 S(3) 1-0 S(1) 2-1 S(1) 1-0 S(3) 1-0 S(1) 2-1 S(1) 1-0 S(3) 1-0 S(1) 2-1 S(1)
d [arcsec] [a] 0.72 1.17 1.50
I(H2) [ $\frac{\rm W}{\rm m^{2}~arcsec^{2}}$] 1.4 $\times $ 10-18 1.4 $\times $ 10-18 <8.4 $\times $ 10-19 1.7 $\times $ 10-18 1.2 $\times $ 10-18 <8.4 $\times $ 10-19 2.0 $\times $ 10-18 9.3 $\times $ 10-19 <8.4 $\times $ 10-19
S/N [$\sigma$] $\sim$3 $\sim$5 <3 $\sim$3 $\sim$4 <3 $\sim$4 $\sim$3 <3
AK [mag] [b] 14.6 6.7 0.4
F(H2) [ $\frac{\rm W}{\rm m^{2}}$]  [b],[c] 5.8 $\times $ 10-11 5.9 $\times $ 10-11 <3.5 $\times $ 10-11 5.1 $\times $ 10-14 3.4 $\times $ 10-14 <2.5 $\times $ 10-14 1.9 $\times $ 10-16 8.8 $\times $ 10-17 <7.9 $\times $ 10-17
$\cal L$(H2) [ $\cal L\hbox{$_{\odot}$ }$]  [b],[c] 8.8 8.9 5.3 7.7 $\times $ 10-3 5.2 $\times $ 10-3 3.8 $\times $ 10-3 2.8 $\times $ 10-5 1.3 $\times $ 10-5 < 1.2 $\times $ 10-5
Notes: a Measured from the disk center; b highly uncertain, as based on upper limits for the H2 v=2-1 S(1) line fluxes (see detailed discussion in the text); c extinction corrected.

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