Table 1: Source sample.
Source RA(J2000) Dec(J2000) $V_{\rm Lsr}$ Distance

name [h m s] [ $\deg$ $^\prime$ $^{\prime\prime}$ ] ( ${\rm km~s}^{-1}$ ) (pc)

Starless Cores

L 1498 04 10 53.67 +25 10 18.12 7.80 140

TMC-2 04 32 44.03 +24 23 32.56 6.10 140

TMC-1C 04 41 38.81 +26 00 21.98 5.20 140

L 1517B 04 55 18.00 +30 37 43.84 5.80 140

L 1544 05 04 17.23 +25 10 42.70 7.14 140

L 183 15 54 08.56 -02 52 48.99 2.50 110

Oph D 16 28 28.56 -24 19 25.03 3.40 165

B 68 17 22 38.64 -23 49 46.03 3.40 125

L 429 18 17 05.53 -08 13 29.94 6.82 200

L 694-2 19 41 05.03 +10 57 01.99 9.60 250

Protostellar Cores

NGC 1333 DCO⁺ 03 29 12.10 +31 13 26.30 6.00 350

B 1 03 33 20.84 +31 07 34.27 6.00 350

IRAM 04191 04 21 56.91 +15 29 46.10 6.60 140

L 1521F^a 04 28 39.80 +26 51 35.00 6.48 140

Ori B9 05 43 08.17 -01 15 11.76 9.10 450

NGC 2264G-VLA2 06 41 11.09 +09 55 59.01 8.00 800

**Table 1:** Source sample.
Source	RA(J2000)	Dec(J2000)	$V_{\rm Lsr}$	Distance
name	[h m s]	[ $\deg$ $^\prime$ $^{\prime\prime}$ ]	( ${\rm km~s}^{-1}$ )	(pc)
Starless Cores
L 1498	04 10 53.67	+25 10 18.12	7.80	140
TMC-2	04 32 44.03	+24 23 32.56	6.10	140
TMC-1C	04 41 38.81	+26 00 21.98	5.20	140
L 1517B	04 55 18.00	+30 37 43.84	5.80	140
L 1544	05 04 17.23	+25 10 42.70	7.14	140
L 183	15 54 08.56	-02 52 48.99	2.50	110
Oph D	16 28 28.56	-24 19 25.03	3.40	165
B 68	17 22 38.64	-23 49 46.03	3.40	125
L 429	18 17 05.53	-08 13 29.94	6.82	200
L 694-2	19 41 05.03	+10 57 01.99	9.60	250
Protostellar Cores
NGC 1333 DCO⁺	03 29 12.10	+31 13 26.30	6.00	350
B 1	03 33 20.84	+31 07 34.27	6.00	350
IRAM 04191	04 21 56.91	+15 29 46.10	6.60	140
L 1521F^a	04 28 39.80	+26 51 35.00	6.48	140
Ori B9	05 43 08.17	-01 15 11.76	9.10	450
NGC 2264G-VLA2	06 41 11.09	+09 55 59.01	8.00	800

^a Embedded low luminosity object recently detected by Spitzer (Bourke et al. 2006).

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