SIMBAD references

J.-U. Ness and S. Starrfield, Arizona State University; G. Schwarz, West Chester University; K. L. Page and J. P. Osborne, Leicester University, report, on behalf of the Swift nova-CV group, that the nova V5516 Sgr was observed twice with Swift XRT. The outburst was on 2005 July 4 (IAUC 8559), and the first Swift observation on 2005 Aug. 29 (55.7 days after outburst) yielded a marginal detection of 0.0012 ± 0.001 counts per second (Ness et al. 2007, Ap.J. 663, 505). A second observation was carried out on 2007 Aug. 7.742 UT (763.75 days after outburst) with an exposure time of 3400 s. The average count rate was 0.56 ± 0.1 counts/s, and the spectrum is that of a Super Soft X-ray Source. Blackbody fits were attempted as a first approximation, yielding a temperature of approximately 450000 K, but poor fits were obtained, and the uncertainties in the extinction and distance are quite large. Observations with Swift are continuing, and observations at other wavelengths are urged.