Optical and X-Ray Observations of the Symbiotic System Ag Draconis During Quiescence and Outburst
Friedjung, Michael; González-Riestra, Rosario; Greiner, Jochen; Viotti, Roberto F.; Iijima, Takashi; Bernabei, Stefano; Claudi, Riccardo; Polcaro, Vito Francesco; Rossi, Corinne
Italy, Spain, Germany, France
Abstract
We review the main characteristics of the symbiotic system AG Draconis, with special emphasis on its optical and X-ray variations. We also discuss the X-ray to visual energy distribution during quiescence and outburst and describe our spectroscopic and X-ray observations during the 2003 outburst.