Table 1: Peak separation in the cspl of NGC 6741.
Ion IP range (eV) 2 $V_{\rm exp}$ (km s^-1)

Wilson (1950) Robinson et al. (1982) This paper

[O I] 0.0-13.6 - - 55.1

[S II] 10.4-23.3 - - 54.0

[O II] 13.6-35.1 44.2 - 53.7

H I $\ge$ 13.6 - 44.0

[N II] 14.5-29.6 42.1 - 53.5

[S III] 23.4-34.8 - - 48.2

He I 24.6-54.4 - - 48.0

[Ar III] 27.6-40.7 - - 47.6

[O III] 35.1-54.9 41.6 42 46.1

[Ar IV] 40.7-59.8 - - 33.7

[Ne III] 41.0-63.4 41.0 - 48.2

N III 47.4-77.5 - - 40.0

He II $\ge$ 54.4 - - 34.0

[Ar V] 59.8-75.0 - - 25.0

[Ne V] 97.1-126.2 0.0: - -

**Table 1:** Peak separation in the cspl of NGC 6741.
Ion	IP range (eV)		2 $V_{\rm exp}$ (km s^-1)
		Wilson (1950)	Robinson et al. (1982)	This paper
[O I]	0.0-13.6	-	-	55.1
[S II]	10.4-23.3	-	-	54.0
[O II]	13.6-35.1	44.2	-	53.7
H I	$\ge$ 13.6		-	44.0
[N II]	14.5-29.6	42.1	-	53.5
[S III]	23.4-34.8	-	-	48.2
He I	24.6-54.4	-	-	48.0
[Ar III]	27.6-40.7	-	-	47.6
[O III]	35.1-54.9	41.6	42	46.1
[Ar IV]	40.7-59.8	-	-	33.7
[Ne III]	41.0-63.4	41.0	-	48.2
N III	47.4-77.5	-	-	40.0
He II	$\ge$ 54.4	-	-	34.0
[Ar V]	59.8-75.0	-	-	25.0
[Ne V]	97.1-126.2	0.0:	-	-

Source LaTeX | All tables | In the text

	1 Introduction
	2 Observations and reductions
	3 The gas spatio-kinematics
	4 The absorption (interstellar + circum-nebular)
	5 The nebular distance, size and age
	6 The central star parameters
	7 The nebular parameters
	8 The 3-D morpho-kinematical structure
	9 Discussion
	10 Conclusions
	References
	Online Material