Probing X-ray irradiation in the nucleus of NGC 1068 with observations of high-J lines of dense gas tracers

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This article has an erratum: [https://doi.org/10.1051/0004-6361/200912350e]

Table 4:

Line intensity ratios between the peak antenna temperatures, assuming a source size of 1.5''.
Molecule	Transitions	Ratio^a
CN	$\frac{2_{5/2}-1_{3/2}}{1_{3/2}-0_{1/2}}$	0.61 $\pm$ 0.39
CN	$\frac{3_{5/2}-2_{5/2}}{2_{5/2}-1_{3/2}}$	0.13 $\pm$ 0.04
HCN	$\frac{3-2}{1-0}$	1.01 $\pm$ 0.53
HCN	$\frac{4-3}{3-2}$	0.49 $\pm$ 0.14
HNC	$\frac{3-2}{1-0}$	0.38 $\pm$ 0.18
HNC	$\frac{4-3}{3-2}$	0.30 $\pm$ 0.10
HCO⁺	$\frac{3-2}{1-0}$	0.12 $\pm$ 0.04^b
HCO⁺	$\frac{4-3}{3-2}$	1.37 $\pm$ 0.46

^a See Pérez-Beaupuits et al. (2007) for the J=1-0 and J=3-2 transitions. The low-J lines of HCO⁺ were obtained from Krips et al. (2008).
^b This ratio slightly differs from that found by Krips et al. (2008) because we use the ratio between the peak main beam temperatures and we corrected the HCO⁺ J=1-0 line for the starburst contribution factor.

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