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Table 6:

Integrated intensity line ratios derived from the CO measurements at the central position.
Property Result
$M_{\rm H2}$ (108 $M_{\odot}$) 4.6
12CO(2-1)/12CO(1-0) 0.5 (0.06)
13CO(2-1)/13CO(1-0) 0.42 (0.17)
12CO(1-0)/13CO(1-0) 21 (3.5)
12CO(2-1)/13CO(2-1) 25 (7.6)

In brackets, the errors in the line ratio are given, following standard error propagation calculations. A source size of 22 $^{\prime \prime }$ is used to evaluate the line ratios.


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