[Fe II] 1.644 µm imaging survey of planetary nebulae with low-ionisation structures

Open Access

Table 2

Observations log.

PN	[Fe II] 1.644 µm + H I 12-4 1.640 µm^(†)		H-continuum^(††)
	T^(a)	#	T^(a)	#
	(s)	Frames	(s)	Frames
NGC 6210	177	10	177	9
NGC 6751	176^(b)	11	176	10
NGC 6543	180^(c)	8	180^(c)	10
NGC 7009	177	10	177	10
IC 4634	170	7	170	7

Notes. ^(†)λ_c = 1.644 µm, ∆λ = 0.02466 µm. ^(††)λ_c = 1.570 µm, ∆λ = 0.02355 µm. ^(a)Exposure time of each frame in s. ^(b)2 coadds of 88 s each. ^(c)9 coadds of 20 s each.

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