A detailed X-ray study of the longest-lived nova in outburst comma V723 Cas

With 14 years, V723Cas is the oldest nova in the Galaxy. We search for reasonsfor the long life time of this nova compared to all other novae. With anuninterrupted 60ks XMM observation, covering one orbit, we can: (1) constrainthe location of gas in the binary system using orbit phaseresolved EPIC spectra(2) study Xray/UV variability, yielding the WD spin period, g modeoscillations, or evidence of renewed accretion disk activity (3) seecorrelations between Xray and UV variability (4) investigate illuminationeffects of the companion with OM (5) determine from RGS whether the Xrayspectrum is a typical SSS spectrum, or whether it consists of overlappingemission lines. (6) search for emission lines yielding information on renewed accretion and cooling ejecta truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]