088264

Since 2014 the symbiotic recurrent nova T Coronae Borealis has been in a high accretion rate state rapidly accumulating the hydrogen-rich fuel that the massive white dwarf in this system will need for its next nova eruption expected within several years. T CrB is evolving within this high state with the optical light showing a gradual fading. XMM observations in 2017 2018 and 2020 however suggested that the accretion rate remained relatively constant. The observed differences appear to be caused by changes in the intrinsic absorber probably related to the accretion disk wind. We therefore propose a set of two joint XMM-HST observations to monitor the accretion rate through the Keplerian disk and the boundary layer and the amount of X-ray/UV absorber during this crucial period. [truncated! Please see actual data for full text]