**Table 1:** Summary of the SMA observations.
Source	L1489 IRS
$\alpha,\delta$ (2000)^a	04:04:42.85, +26:18:56.3
Frequency	267.55762 GHz (1.12 mm)
Integrated line intensity	41.85 Jy beam^-1 km s^-1
Peak line intensity	2.04 K
Noise level (rms)	0.35 Jy beam^-1
Continuum flux	36.0 $\pm$ 2.3 mJy
Noise level (rms)	3.7 mJy beam^-1
Synthesized beam size	$0.9'' \times 0.7''$
(Uniform weighting)

^a Coordinates are given at the position where
the continuum emission peaks.

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