SIMBAD references

We report the results of a high-time-resolution radial velocity study of the subdwarf B star and possible Type Ia supernova progenitor KPD 1930+2752. There were no significant peaks in the power spectrum of the velocity curve above our detection limit, about 4km.s^–1, at the frequencies where peaks arising from pulsation were present in the photometric data of previous researchers. We report an orbital velocity amplitude, 348.5±1km.s^–1, in agreement with that reported by previous investigators. We find an orbital period of P =0.09509308±0.00000015d based on our data and the ephemeris of Maxted et al.