Table 1: Results of SMA observations at 1.1 mm.
IRS 63 Elias 29 Ridge

$F_\nu$ (P)^a [mJy bm^-1] 459 47 31

RA^a [J2000] 16:31:35.65 16:27:09.42 16:27:09.48

Dec^a [J2000] -24:01:29.56 -24:37:18.91 -24:37:22.48

rms^b [mJy bm^-1] 6 5 5

Circular Gaussian fits to all data

$F_\nu$ (G)^c [mJy] 474 72 28

FWHM^c [arcsec] $0.55 \pm 0.08$ $2.2 \pm 0.5$ -

Circular Gaussian fits to data $\ge$ 16 k $\lambda$ (scales <13 arcsec)

$F_\nu$ (G)^c [mJy] 480 57 27

FWHM^c [arcsec] $0.62 \pm 0.08$ $1.7 \pm 0.7$ -

Line data

HCO^+d [K km s^-1] $3.1 \pm 0.3$ $23.7 \pm 2.5$ $23.5 \pm 2.5$

HCN^d [K km s^-1] <1.8 <3.8 <3.8

^a Point source fit in the (u, v) plane.
^b Calculated from the cleaned image.
^c Circular Gaussian fit in the (u, v) plane.
^d Integrated intensities are from a $4 \times 4\hbox{$^{\prime\prime}$ }$ square around the continuum emission. The synthesised beam is $\sim$ $4 \times 2.5\hbox{$^{\prime\prime}$ }$ . HCN was not detected; quoted values are 3 $\sigma$ upper limits.

**Table 1:** Results of SMA observations at 1.1 mm.
	IRS 63	Elias 29	Ridge
$F_\nu$ (P)^a [mJy bm^-1]	459	47	31
RA^a [J2000]	16:31:35.65	16:27:09.42	16:27:09.48
Dec^a [J2000]	-24:01:29.56	-24:37:18.91	-24:37:22.48
rms^b [mJy bm^-1]	6	5	5
Circular Gaussian fits to all data
$F_\nu$ (G)^c [mJy]	474	72	28
FWHM^c [arcsec]	$0.55 \pm 0.08$	$2.2 \pm 0.5$	-
Circular Gaussian fits to data $\ge$ 16 k $\lambda$ (scales <13 arcsec)
$F_\nu$ (G)^c [mJy]	480	57	27
FWHM^c [arcsec]	$0.62 \pm 0.08$	$1.7 \pm 0.7$	-
Line data
HCO^+d [K km s^-1]	$3.1 \pm 0.3$	$23.7 \pm 2.5$	$23.5 \pm 2.5$
HCN^d [K km s^-1]	<1.8	<3.8	<3.8

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