High-resolution XMM-Newton X-ray spectra of V2491 Cyg probing different stages of evolution

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Observations of novae in X-rays have been revolutionised by the capability of Swift to carry out long-term monitoring campaigns on up to sub-daily times scales. The dense X-ray light curves allow us to accurately schedule deeper X-ray observations with Chandra or XMM-Newton. V2491 Cyg is a fast nova, and the bright supersoft source phase lasted only one month. Because of the dense Swift monitoring we were able to schedule two XMM-Newton observations within this period of time, yielding well-exposed RGS spectra, each probing quite different conditions. The XMM-Newton X-ray and UV light curves display a high degree of variability, and I will present grating spectra that were extracted from time periods that correspond to low- and high-flux phases. I will also present similar spectra from other novae for comparison.

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