Table 1: Observations of PSF calibration fields. The Strehl ratio is that measured on-axis in the short exposure frames taken before and after the deep science exposures.
Field Date Filter Exp. Time Strehl

(min) (%)

NGC 6809 15.12.02 $K_{\rm s}$ 60 28

NGC 6752 06.09.03 $K_{\rm s}$ 12 27

**Table 1:** Observations of PSF calibration fields. The Strehl ratio is that measured on-axis in the short exposure frames taken before and after the deep science exposures.
Field	Date	Filter	Exp. Time	Strehl
			(min)	(%)
NGC 6809	15.12.02	$K_{\rm s}$	60	28
NGC 6752	06.09.03	$K_{\rm s}$	12	27

Source LaTeX | All tables | In the text

	1 Introduction
	2 SWAN
	3 Other proposed methods to quantify anisoplanaticism
	4 The PSF model for SWAN
	5 Testing the PSF model with simulations of galaxy profiles
	6 First results from five deep science fields
	7 Conclusions
	References