**Table 2:** Line fluxes measured along slit #1 ( $\rm PA= 0\hbox {$^\circ $ }$ ) and slit #2 ( $\rm PA=50\hbox {$^\circ $ }$ ) in units of 10^-18 W m^-2. We also give significant line flux ratios and results such as the ortho-to-para ratios ( $\phi _1$ , $\phi _2$ and $\phi _3$ ), the extinction (A_K) and the excitation temperature ( $T_{\rm ex}$ ).
	Slit #1: $\rm PA= 0\hbox {$^\circ $ }$				Slit #2: $\rm PA=59\hbox {$^\circ $ }$
	Region 1	Region 2	Region 3	Region 4	Region 5	Region 6	Region 7	Region 8	Region 9	5+6+7+8+9
1-0 S(3) $^{\rm a}$	$7.4\pm1.6$	$10.1\pm2.2$	$22.1\pm5.9$	$10.8\pm3.7$	$20.1\pm1.6$	$14.7\pm2.5$	$75.3\pm4.7$	$55.2\pm4.4$	$169\pm42$	$343\pm22$
1-0 S(2)	$3.0\pm1.2$	<4	$4.1\pm0.9$	$1.6\pm0.2$	$5.7\pm1.0$	$4.3\pm0.5$	$16.0\pm0.5$	$16.2\pm0.6$	$38.7\pm1.6$	$81.8\pm1.9$
3-2 S(5)	<5	<4	<1	<1	<3	<2	$0.7\pm0.2$	$0.6\pm0.2$	$1.6\pm0.3$	$2.9\pm0.9$
2-1 S(3)	<4	<4	$1.2\pm0.3$	$0.6\pm0.3$	$1.5\pm0.7$	$1.5\pm0.3$	$4.4\pm0.2$	$3.7\pm0.2$	$10.8\pm0.5$	$22.0\pm1.1$
1-0 S(1)	$10.8\pm1.2$	$4.0\pm0.9$	$10.2\pm0.9$	$4.4\pm1.4$	$20.5\pm1.0$	$12.3\pm0.5$	$47.0\pm0.8$	$47.0\pm1.5$	$106\pm5$	$237\pm5$
3-2 S(4)	<4	<4	<1	<1	<3	<1	<1	<1	$0.9\pm0.2$	$1.3\pm0.9$
2-1 S(2)	$1.4\pm0.9$	$2.7\pm0.7$	<2	<2	<5	<3	$1.9\pm0.3$	$1.1\pm0.2$	$4.8\pm0.3$	$7.8\pm1.7$
Br $\gamma$	<3	<3	<1	<1	$1.6\pm0.7$	$1.2\pm0.4$	$1.6\pm0.4$	<1	<1	$5.4\pm1.7$
3-2 S(3)	<6	<6	<1	<1	<4	<2	<1	$0.5\pm0.1$	$2.5\pm0.2$	$4.3\pm1.4$
1-0 S(0)	$2.5\pm1.6$	<6	$3.0\pm0.4$	$1.6\pm0.7$	$6.4\pm1.4$	$3.6\pm1.0$	$11.7\pm0.4$	$12.0\pm0.5$	$26.8\pm1.4$	$60.6\pm2.7$
2-1 S(1)	<6	<6	$1.8\pm0.5$	<1	$2.4\pm1.0$	$1.4\pm0.5$	$4.4\pm0.4$	$3.8\pm0.2$	$11.6\pm0.7$	$23.8\pm1.8$
2-1 S(0)	<7	<6	<2	<2	<5	<3	<3	$0.6\pm0.3$	$2.9\pm0.6$	$5.1\pm2.6$
3-2 S(1)	<7	<11	<2	<2	<8	<6	<4	$1.2\pm0.5$	<3	$7.5\pm4.1$
${{\rm 1-0~S(1)}\over {\rm 2-1~S(1)}}$ ^(b)	>1.8	>0.7	$5.7\pm1.6$	>4.4	$8.5\pm3.6$	$8.8\pm3.1$	$10.7\pm1.0$	$12.4\pm0.8$	$9.1\pm0.7$	$10.0\pm0.8$
${{\rm 1-0~S(1)}\over {\rm 3-2~S(3)}}$ ^(b)	>1.8	>0.7	>10.2	>4.4	>5.0	>6.1	>47	$94\pm19$	$42\pm4$	$55\pm18$
$\phi _1$	$3.2\pm1.3$	>0.6	$2.4\pm0.3$	$2.2\pm0.8$	$2.8\pm0.4$	$2.6\pm0.4$	$2.9\pm0.1$	$2.8\pm0.1$	$2.8\pm0.1$	$2.9\pm0.1$
$\phi _2$	<4.1	<1.9	>1.1		>0.4	>0.6	$2.5\pm0.3$	$3.8\pm0.4$	$2.6\pm0.1$	$3.3\pm0.5$
$\phi _3$								>1.0	$2.5\pm0.5$	$2.8\pm1.5$
A_K	$4.5\pm0.4$		$2.8\pm0.5$	$3.4\pm0.6$	$4.0\pm0.2$	$1.6\pm0.4$	$1.5\pm0.5$	$1.2\pm0.7$	$1.3\pm1.1$	$1.6\pm0.5$
$T_{\rm ex}$ (K)	$3440\pm265$		$2300\pm115$	$2295\pm165$	$2000\pm40$	$2270\pm80$	$2115\pm70$	$2000\pm70$	$2390\pm110$	$2135\pm60$

^(a) This line falls in a region of poor atmospheric transmission; the indentification as 1-0 S(3) is therefore dubious and it is discarded from the analysis. ^(b) This line ratio has not been corrected for extinction.

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