Extended Data Fig. 1: X-Shooter spectrum of ASASSN-19bh.
From: Localized thermonuclear bursts from accreting magnetic white dwarfs
a. X-Shooter spectrum (UBV arm) in the range 3900 Å-4900 Å. b. X-Shooter spectrum (VIS arm) in the range 5800 Å–6700 Å. Hydrogen Balmer-series lines are marked with the red dashed lines. The HeI 5875 Å is marked with a blue dashed line. CaII H&K emission lines can be seen blueward of 4000 Å. Numerous narrow absorption lines from the secondary are also identifiable. Narrow emission spikes in e.g. the region 6000–6200 Å are residuals from the sky subtraction.
