Nitrogen Abundance and the Hot Blackbody Puzzle of Intermediate Polars

V2731 Oph is an intermediate polar with a complex Xray spectrum including a hot(kTvirgul100 eV) blackbody component, according to a previous short XMMNewtonobservation, indicative of a locally superEddington accretion rate. However, itis possible that the temperature measurement was incorrect because V2731 Oph isoverabundant in nitrogen, which went unnoticed in the previous analysis due tothe lack of high S/N RGS spectrum. If overabundance is confirmed, it can bothsolve the hot blackbody puzzle and have important implications on the pastevolutionary history of V2731 Oph. We therefore propose a much longer XMMNewtonobservation to obtain high quality RGS data. We also request a simultaneousNuSTAR observation to break potential degeneracies among soft and hard component parameters. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]