**Table 5:** OH comet observations, Nançay RT and MPIfR, May 2004.
May date	Line area ^a	Line area ^b	Line area ^c
	LTE	LTE	1667 only
	[mJy km s^-1]	[mJy km s^-1]	[mJy km s^-1]
Comet C/2001 Q4 (NEAT)
16	104 $\pm$ 12	no obs.	no obs.
17	101 $\pm$ 12	65-207	130 $\pm$ 31
18	75 $\pm$ 12	no obs.	no obs.
Comet C/2002 T7 (LINEAR)
16	176 $\pm$ 12	no obs.	no obs.
17	no obs.	$229\pm28$	203 $\pm$ 39
18	185 $\pm$ 16	no obs.	no obs.

^a Nançay RT, mean of 1665 MHz and 1667 MHz lines assuming LTE ratio of 5:9.
^b MPIfR, mean of 1665 MHz and 1667 MHz lines assuming LTE ratio of 5:9. The range for C/2001 Q4 assuming the 1665 MHz line amplitude lies between 0 and its 3 $\sigma$ upper limit.
^c MPIfR, 1667 MHz detection only.

Source LaTeX | All tables | In the text

	1 Introduction
	2 Ammonia line observations
	3 Hydroxyl line observations
	4 Upper limits on NH₃ column densities and production rates
	5 Ammonia-to-water ratio
	6 Conclusions
	References