RGS1/2 spectrum during the low-flux state (black), fit with the TBabs, TMAF atmosphere model 003 (green), and VAPEC plasma model (red) with free C, N and O abundances. The total model is shown in blue. Best fits are obtained with normalization of the atmosphere about a factor of eight fainter than in high-flux, an atmosphere temperature around 7 × 10⁵ K, a plasma temperature around 0.1 keV, and poorly constrained but high overabundances of [C], [N], and [O].