SIMBAD references

H. E. Bond, Space Telescope Science Institute, reports that LV Vel – the hydrogen-deficient central star of the planetary nebula "Longmore 4" (Longmore 1977, MNRAS 178, 251; R.A. = 10h05m45s.7, Decl. = -44o21'32", equinox 2000.0), whose low-amplitude pulsations were discovered by Bonds and Meakes (1990, A.J. 100, 783) – normally has a PG-1159-type absorption spectrum, with the O VI 381.1-383.4-nm doublet in emission. On three past occasions (one in 1992, two in 2006; Bond 2008, ASP Conf. Series 391, 129), the spectrum has changed temporarily to an emission-line [WCE] type, with strong emission at the C IV + He II complex near 465.9-468.6 nm and of O VI 529.1-nm. A spectrum obtained on 2008 Nov. 30.27 UT with the SMARTS 1.5-m telescope at Cerro Tololo by M. Hernandez and F. Walter shows that a new emission-line outburst is underway. Spectroscopic and photometric monitoring, including high-speed photometry of the star's GW Vir-type pulsations, is desirable throughout the duration of the current event. The previous spectroscopic outbursts of LV Vel (Lo 4) lasted no more than (an upper limit of) about 2 weeks.