2001A&A...367..933P

Theoretical spectral energy distributions are computed for a grid of hydrogen-deficient and carbon-rich model atmospheres with a range in T_eff of 4000-5500K and logg of 1.0-0.0, using the technique of opacity sampling, and taking into account continuous, atomic line and molecular band absorption. The energy distributions are compared with the spectrum of V4334 Sgr (Sakurai's object) of August 12, 1998 in the wavelength interval 300-1000nm. This comparison yields an effective temperature of V4334 Sgr of T_eff=5250±200K, and a value for the interstellar plus circumstellar reddening of E_B–V=1.3±0.1.