SIMBAD references

A. Pastorello, S. J. Smartt, M. T. Botticella, L. Magill, D. Young, S. Valenti, and R. Kotak, Queen's University, Belfast, on behalf of the PS1 Collaboration (see, e.g., CBETs 1617, 1988, 2214), report that a luminous optical transient detected by three wide-field surveys has evolved into a type-Ic supernova. The Catalina Real Time Transient Survey first announced the discovery of an optical transient (designated as CSS 100313:112547-084941) at R.A. = 11:25:46.71, Decl. = -8:49:41.4 (equinox 2000.0; cf. Mahabal and Drake 2010, website URL http://www.astronomerstelegram.org/?read=2490 and/?read=2508), on Mar. 13 (at SDSS r magnitude 18.6), and subsequently the "Palomar Transient Factory" (PTF) collaboration reported an independent discovery on images obtained during Mar. 5-16 (and designated PTF10cwr; Quimby et al. 2010, URL http://www.astronomerstelegram.org/?read=2492). Pastorello et al. (2010, http://www.astronomerstelegram.org/?read=2504) noted that the transient was also detected by PS1 in the course of the 3Pi survey during Mar. 12-23 (which they designated PS1-1000037). Early spectra by the CRTS, PTF, and PS1 teams all indicated a blue continuum with broad O II features and a host-galaxy (SDSS J112546.72-084942.0) redshift of z = 0.23. The host redshift implies a very luminous transient (absolute mag < -21), and the spectra were similar to the "ultra-bright" supernova 2005ap (see http://www.astronomerstelegram.org/?read=2490,/?read=2508,/?read=2492,/?read=2504; also, Quimby et al. 2007, Ap.J. 668, L99). Further detailed spectroscopic monitoring with the Gemini South telescope and the William Herschel Telescope by the PS1 team shows that – 25 days after discovery – the transient (here designated supernova 2010gx) evolved unambiguously into a type-Ic event with the characteristic broad Fe II, Si II, Mg II, and Ca II features. The spectra at +25 days are most similar to those of SN 1994I (at six days before peak; Baron et al. 1996, MNRAS 279, 799) and SN 2003jd (at peak; Valenti et al. 2008, MNRAS 383, 1485). This indicates a link between the "ultra-bright" optical transients and type-Ic supernovae; further details are reported by Pastorello et al. (2010, Ap.J., submitted).