Monthly Notices of the Royal Astronomical Society · 1980 · 54 citations · 0 references
A high-resolution spectrum of the shell star associated with GX304 –1 (4Ul258–61) has been obtained. The star is of spectral type B2 Vne. It is rotating at near break-up velocity and losing mass, probably via an expanding equatorial disc ~ 2–5<it>R</it><inf>*</inf> in size. A distance of 2.4 ± 0.5 kpc is derived.