The spectrum of V 4334 Sgr ( Sakurai ’ s object ) in August , 1998 ⋆

Theoretical spectral energy distributions are computed for a grid of hydrogen-deficient and carbon-rich model atmospheres with a range in Teff of 4000− 5500 K and log g 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 − 1000 nm. This comparison yields an effective temperature of V4334 Sgr of Teff = 5250± 200 K, and a value for the interstellar plus circumstellar reddening of EB−V = 1.3± 0.1.