The ionization fraction gradient across the Horsehead edge: an archetype for molecular clouds

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Volume 498 / No 3 (May II 2009)

A&A, 498 3 (2009) 771-783

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Table 2:

Observation parameters of the IRAM-30 m observations.
Molecule	Transition	Frequency	Instrument	${F_{\rm eff}}$	${B_{\rm eff}}$	Resol.	Resol.	Int. Time	Noise $^{\dagger }$	Observing	Obs. date
		GHz				arcsec	km s^-1	hours	K	Mode
HCO⁺	J=1-0	89.188523	30 m/A100	0.95	0.78	27.6''	0.20	4.7	0.02	ON-OFF	2008
HOC⁺	J=1-0	89.487414	30 m/A100	0.95	0.78	27.5''	0.20	4.7	0.02	ON-OFF	2008
CO⁺	2, 5/2-1, 3/2	236.062578	30 m/A230	0.91	0.52	10.4''	0.20	4.7	0.05	ON-OFF	2008
H¹³CO⁺	J=1-0	86.754288	30 m/AB100	0.95	0.78	28.4''	0.20	2.6	0.10	OTF map	2006-07
H¹³CO⁺	J=3-2	260.255339	30 m/HERA	0.90	0.46	13.5''	0.20	5.9	0.06	OTF map	2006
DCO⁺	J=2-1	144.077289	30 m/CD150	0.93	0.69	18.0''	0.08	5.9	0.18	OTF map	2006
DCO⁺	J=3-2	216.112582	30 m/HERA	0.90	0.52	11.4''	0.11	1.5	0.10	OTF map	2006

$^{\dagger }$ The noise (in $T_{\ensuremath{{\rm mb}} }$ scale) refers to the channel spacing obtained by averaging adjacent
channels to the velocity resolution given in the tables.

Source LaTeX | All tables | In the text

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