GALACTICNUCLEUS: A high angular resolution JHKs imaging survey of the Galactic centre - I. Methodology, performance, and near-infrared extinction towards the Galactic centre

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Table 1

Details of the imaging observations used in this work.

Date	HAWK-I	Seeing^a	N^b	NDIT^c	DIT^d
	band	(arcsec)			(s)
07 June 2013	J	0.46	16	32	0.85
07 June 2013	H	0.42	16	32	0.85
07 June 2013	K_s	0.41	16	32	0.85
08 June 2015	J	0.37	49	20	1.26
06 June 2015	H	0.52	49	20	1.26
06 June 2015	K_s	0.57	49	20	1.26

Notes. ^(a) In-band seeing estimated from the PSF FWHM measured in long exposure images. ^(b) Number of pointings. ^(c) Number of exposures per pointing. ^(d) Integration time for each exposure. The total integration time of each observation is given by N × NDIT ×DIT.

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