Table 1: Observation parameters.
Phase center Number of fields

Mosaic 1 $\rm\alpha_{2000} = 05^h40^m54.27^s$ $\delta_{2000} = -02^\circ 28' 00''$ 7

Mosaic 2 $\rm\alpha_{2000} = 05^h40^m53.00^s$ $\delta_{2000} = -02^\circ 28' 00''$ 4

**Table 1:** Observation parameters.
	Phase center	Number of fields
Mosaic 1	$\rm\alpha_{2000} = 05^h40^m54.27^s$	$\delta_{2000} = -02^\circ 28' 00''$	7
Mosaic 2	$\rm\alpha_{2000} = 05^h40^m53.00^s$	$\delta_{2000} = -02^\circ 28' 00''$	4

Molecule and Line	Frequency	Beam	PA	Noise^a	Obs. date
	GHz	arcsec	$\ensuremath{^\circ}$	$\ensuremath{~ \ensuremath{{\rm K~km~s^{-1}}}}$
Mosaic 1
c-C₃H₂ 2_1,2-1_0,1	85.339	$6.13 \times 4.75$	36	3.1 $\times 10^{-2}$	Mar. 2002 and Apr. 2002
C₄H-1 $N=9{-}8,\ J=19/2{-}17/2$	85.634	$6.11 \times 4.74$	36	$2.6\times 10^{-2}$	Mar. 2002 and Apr. 2002
C₄H-2 $N=9{-}8,\ J=17/2{-}15/2$	85.672	$6.11 \times 4.74$	36	$3.4\times 10^{-2}$	Mar. 2002 and Apr. 2002
CCH-1 $N=1{-}0,\ J=3/2{-}1/2\ F=2{-}1$	87.316	$7.24 \times 4.99$	54	$3.4\times 10^{-2}$	Dec. 2002 and Mar. 2003
CCH-2 $N=1{-}0,\ J=3/2{-}1/2\ F=1{-}0$	87.328	$7.24 \times 4.99$	54	$2.5\times 10^{-2}$	Dec. 2002 and Mar. 2003
CCH-3 $N=1{-}0,\ J=1/2{-}1/2\ F=1{-}1$	87.402	$7.24 \times 4.99$	54	$3.4\times 10^{-2}$	Dec. 2002 and Mar. 2003
CCH-4 $N=1{-}0,\ J=1/2{-}1/2\ F=0{-}1$	87.407	$7.24 \times 4.99$	54	$2.3\times 10^{-2}$	Dec. 2002 and Mar. 2003
C¹⁸O J=2-1	219.560	$6.54 \times 4.31$	65	$9.8\times 10^{-2}$	Mar. 2003
Mosaic 2
¹²CO J=1-0	115.271	$5.95 \times 5.00$	65	$1.2\times 10^{-1}$	Nov. 1999
¹²CO J=2-1	230.538	$2.97 \times 2.47$	66	$1.7\times 10^{-1}$	Nov. 1999

^a The noise values quoted here are the noises at the mosaic center (Mosaic noise is inhomogeneous due to primary beam correction; it steeply increases at the mosaic edges). Those noise values have been computed in 1 $\ensuremath{~ \ensuremath{{\rm km~s^{-1}}}}$ velocity bin.

	1 Introduction
	2 Observations and data reduction
	3 Results
	4 Discussion
	5 Summary and conclusions
	References