1. INTRODUCTION

2. OBSERVATIONS AND REDUCTION

3. THE DETECTION OF AURORAL [O III] λ 4363

4. PROPERTIES OF COSMOS-1908
4.1. The stellar content of COSMOS-1908
4.2. Nebular extinction and star-formation rate
4.3. [O III] λ5007 equivalent width
4.4. Electron density
4.5. Electron temperature and oxygen abundance

5. DISCUSSION