SIMBAD references

The analysis of thirty-two spectra of the Bp He-strong variable star HD 37776 recorded by the SWP camera on board the International Ultraviolet Explorer reveals variations of the far-ultraviolet spectral energy distribution over a time interval of about 26 hr. Variations are present shortwards of 1450 Å which can be partly attributed to variations of lines and continuum of Si II. Other lines due to C II, Si III and Si IV also contribute to the opacity in this range too. The variations suggest that silicon and possibly carbon are not distributed in a uniform manner over the surface.