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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. (†)λc = 1.644 µm, ∆λ = 0.02466 µm. (††)λc = 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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