The First Confirmed SkyMapper Supernova (SMT J21413915-5643445)
ATel #5480; R. Scalzo, F. Yuan, M. Childress, B. Tucker, B. Schmidt (Australian National University)
on 17 Oct 2013; 09:28 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Richard Scalzo (richard.scalzo@anu.edu.au)
Subjects: Optical, Supernovae
Referred to by ATel #: 5620, 5622, 5641, 5912, 5915, 5938, 7254, 7261, 7271, 8935, 8945, 9308, 9337, 9614, 10152, 10331, 10657, 10659, 10676, 10732, 10739, 12191
We report the discovery of a Type Ia SN as part of the SkyMapper Transient (SMT) and Supernova Survey conducted with the 268-megapixel camera on the SkyMapper 1.3-m telescope at Siding Spring Observatory near Coonabarabran, NSW, Australia (Keller et al., 2007, PASA, 24, 1). The source was discovered at RA = 21:41:39.15, DEC = -56:43:44.5 at magnitude g = 20.1, r = 20.0 in SkyMapper images taken 2013 Oct 8.57 UT; no source was detected at this position on Sept 30 to a limiting magnitude of r = 20.6. A spectrum was obtained with the Wide Field Spectrograph (WiFeS; Dopita et al. 2007, ApSS, 310, 255) on 2013 Oct 16 UT. Classification with SNID (Blondin & Tonry 2007, ApJ, 666, 1024) gives good matches to several Type Ia supernovae near maximum light, with the best being the normal SN Ia 2006cj at -1 days. Evident spectral features include Ca H/K, Fe complexes at 4400 A and 5100A, and weak Si 6355 A absorption. We derive a redshift of 0.142 for the host galaxy (APMUKS(BJ) B213806.98-565722.8, b_J = 19.7) based on H-alpha.
