Table 1: Line parameters for CO(1-0) and CO(2-1) at the peak and integrated over the central 10-20''.

Line		 Line Line Integrated Integrated intensity z M(H2+He)b
  peak fluxf width peak intensity in central $\sim$20''    
  [mJy/beam] [km s-1] [Jy/beam km s-1] [Jy km s-1]   [109 $\mathcal{M}_{\odot}$]
PdBI
CO(1-0) $65\pm7$ $121\pm 3$ $8.4\pm 0.2$ $21\pm 1$ $0.0402\pm 0.0001$ 1-8
CO(2-1) $90\pm 20$ $131\pm 7$ $12\pm 0.5$ $25\pm 1$ $0.0402\pm 0.0001$ -
BIMA
CO(1-0) $190\pm 30$ $150\pm 20$ $28\pm 3$ $30\pm 3$ $0.0402\pm 0.0002$ 2-12
  Centre of CO emission Dynamical Centre of CO emission PAc id
  RAe Dece RAe Dece [$^\circ $] [$^\circ $]
PdBI
CO(1-0) 10$^{\rm h}$31$^{\rm m}$57.3$^{\rm s}$ -18$^\circ $46'33.2'' 10$^{\rm h}$31$^{\rm m}$57.3$^{\rm s}$ -18$^\circ $46'33.4'' $\sim$20 $\sim$10-30
CO(2-1) 10$^{\rm h}$31$^{\rm m}$57.3$^{\rm s}$ -18$^\circ $46'33.2'' 10$^{\rm h}$31$^{\rm m}$57.3$^{\rm s}$ -18$^\circ $46'33.4'' $\sim$3 -
BIMA
CO(1-0) 10$^{\rm h}$31$^{\rm m}$57.3$^{\rm s}$ -18$^\circ $46'33.8'' 10$^{\rm h}$31$^{\rm m}$57.3$^{\rm s}$ -18$^\circ $46'33.8'' $\sim$0 $\sim$10-30
a Taking a luminosity distance of 180 Mpc (based on the following cosmology: H0=70 km s-1, $\Omega_m=0.3$ and $\Omega_\lambda=0.7$; 1'' corresponds then to $\sim$0.8 kpc). b Assuming a M(H2) to $L'_{\rm CO}$ conversion factor of 0.8-4.8  $\mathcal{M}_{\odot}$ (K km s-1 pc2)-1 (Solomon & Barrett 1991; Downes & Solomon 1998) and M(H2+He $)=1.36\times M$(H2). c Estimated position angle of the CO emission (from North to East). d Estimated inclination angle of the CO disk. e The position uncertainties are of the order of $\sim$0.2'' for the PdBI data and of $\sim$0.4'' for the BIMA data. f Flux errors include $\sim$10% ($\sim$20%) uncertainties from the flux calibration at 3 mm (1 mm).

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