1 INTRODUCTION

2 OBSERVATIONS AND DATA REDUCTION
2.1 Data reduction
2.2 Photometry calibration
2.3 Source Extraction and Survey Limits

3 SELECTION
3.1 Narrowband excess selection
3.2 Complete sample
3.3 Photometric redshift analysis
3.4 Selecting H α emitters at z=0.84
3.5 Spectroscopic redshifts and selection robustness
3.6 Narrowband K and H matches

4 RESULTS
4.1 H α luminosity function at z=0.84
4.2 The star formation rate density at z=0.84
4.3 The morphology of H α emitters

5 CONCLUSIONS