SIMBAD references

[Editor's Note: This replaces the text on CBET 2770 (designation).]

J. Parrent, D. A. Howell, P. E. Nugent, R. C. Thomas, and M. Sullivan confirm the discovery of PSN J23305702+1529243 in UGC 12640 = SN 2011ef. A CCD spectrum (range 350-900 nm) was taken with the Gemini North telescope on July 20 UT. The spectrum reveals Balmer series and He I P-Cyg profiles superimposed on a relatively blue continuum, indicative of a type-IIb supernova. Assuming a host-galaxy redshift of z = 0.014, the H-alpha absorption feature is blueshifted by about 15800 km/s. A comparison to other spectra of SN 2011dh (http://www.astronomerstelegram.org/?read=3398; CBET 2736) suggests that 2011ef is at a relatively early epoch with respect to maximum light.