Table 1: Observing parameters of the molecular line data. Parameters include: the transition frequency ( $\nu$ ), the Half Power Beam Width (HPBW), the main beam efficiency ( $\eta _{{\rm mb}}$ ), the average system temperature ( $T_{{\rm sys}}$ ) and the average rms noise temperature per channel ( $\Delta T_{{\rm rms}}$ ).
$\nu$ HPBW $\eta _{{\rm mb}}$ $T_{{\rm sys}}$ $\Delta T_{{\rm rms}}$

[GHz] [ $^{\prime \prime }$ ] [K] [K]

SEST 1994

¹³CO(2-1) 220.399 25 0.5 1250 0.7

SEST 1999

¹²CO(2-1) 230.537 24 0.5 460 0.4

CS(5-4) 244.935 21 0.5 607 0.4

CS(3-2) 146.969 34 0.66 293 0.2

CS(2-1) 97.980 52 0.75 293 0.2

**Table 1:** Observing parameters of the molecular line data. Parameters include: the transition frequency ( $\nu$ ), the Half Power Beam Width (*HPBW*), the main beam efficiency ( $\eta _{{\rm mb}}$ ), the average system temperature ( $T_{{\rm sys}}$ ) and the average rms noise temperature per channel ( $\Delta T_{{\rm rms}}$ ).
	$\nu$	HPBW	$\eta _{{\rm mb}}$	$T_{{\rm sys}}$	$\Delta T_{{\rm rms}}$
	[GHz]	[ $^{\prime \prime }$ ]		[K]	[K]
SEST 1994
¹³CO(2-1)	220.399	25	0.5	1250	0.7
SEST 1999
¹²CO(2-1)	230.537	24	0.5	460	0.4
CS(5-4)	244.935	21	0.5	607	0.4
CS(3-2)	146.969	34	0.66	293	0.2
CS(2-1)	97.980	52	0.75	293	0.2

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