1 INTRODUCTION
2 SAMPLE AND DATA REDUCTION
2.1 Basic properties of the full ALPINE sample
2.2 Our sample
3 METHODS
3.1 UV centroids
3.2 Centroid fitting and uncertainty
3.3 Spatial offsets
4 RESULTS
4.1 Offset distributions
5 DISCUSSION
5.1 Relating spatial offsets to physical properties
5.2 Consequences of significant spatial offsets
6 SUMMARY AND CONCLUSIONS