ESOP,a new Fabry-Perot spectrophotometer. Observations of the iron coronal lines in Puppis A

In this paper we present a new spectrophotometer ESOP (Expérience Spectroscopique d'Observation des Plasmas). We describe its general features and characteristics. We report the first spectrophotometric results on the Puppis A supernova remnant on the coronal iron line emission. These FeXIV] observations were in the vicinity of the Eastern X-ray knot. We have observed at 30 scale. In appendices we describe in more details some specific technical points.Based on observations obtained at ESO-La Silla Observatory.