Fig. 1: X-ray temperature and luminosity constraints of [HP99] 159.
From: A helium-burning white dwarf binary as a supersoft X-ray source
a, A 3ML fit of an absorbed blackbody model to the XMM-Newton spectrum with a simultaneous fit of the background with linked parameters (see Methods) provides a good fit. Purple symbols and line show the source + background data and model, red the source only and green the total background. The individual background components are shown in Extended Data Fig. 4. b, Posterior distribution in the temperature versus hydrogen column density plane of the spectral fit in a. Each dot represents one model realization. The colour coding represents the unabsorbed bolometric luminosity assuming a distance of 50 kpc. 1σ, 2σ and 3σ confidence contours are overplotted in green. Vertical dashed lines mark the Galactic foreground absorption and the sum of Galactic and total LMC absorption.
