TY - JOUR
T1 - Supernova 2012ec
T2 - identification of the progenitor and early monitoring with PESSTO
AU - Maund, Justyn Robert
AU - Fraser, M.
AU - Smartt, S.
AU - Botticella, M.T.
AU - Barbarino, C.
AU - Childress, M.
AU - Gal-Yam, A.
AU - Inserra, C.
AU - Pignata, G.
AU - Reichart, D.
AU - Schimdt, B.
AU - Sollerman, Jesper Olof
PY - 2013/5/1
Y1 - 2013/5/1
N2 - We present the identification of the progenitor of the Type IIP SN 2012ec in archival preexplosion Hubble Space Telescope Wide Field Planetary Camera 2 (WFPC2) and Advanced Camera for Surveys Wide Field Channel F814W images. The properties of the progenitor are further constrained by non-detections in pre-explosion WFPC2 F450W and F606W images. We report a series of early photometric and spectroscopic observations of SN 2012ec. The r'-band light curve shows a plateau with Mr' = -17.0. The early spectrum is similar to the Type IIP SN 1999em, with the expansion velocity measured at Ha absorption minimum of -11 700 km s-1 (at 1 d post-discovery). The photometric and spectroscopic evolution of SN 2012ec shows it to be aType IIP SN, discovered only a few days post-explosion (<6 d). We derive a luminosity for the progenitor, in comparison with MARCS model spectral energy distributions, of log L/L⊙ = 5.15 ± 0.19, from which we infer an initial mass rangeof 14-22M⊙. This is the first SN with an identified progenitor to be followed by the Public ESO Spectroscopic Survey of Transient Objects (PESSTO).
AB - We present the identification of the progenitor of the Type IIP SN 2012ec in archival preexplosion Hubble Space Telescope Wide Field Planetary Camera 2 (WFPC2) and Advanced Camera for Surveys Wide Field Channel F814W images. The properties of the progenitor are further constrained by non-detections in pre-explosion WFPC2 F450W and F606W images. We report a series of early photometric and spectroscopic observations of SN 2012ec. The r'-band light curve shows a plateau with Mr' = -17.0. The early spectrum is similar to the Type IIP SN 1999em, with the expansion velocity measured at Ha absorption minimum of -11 700 km s-1 (at 1 d post-discovery). The photometric and spectroscopic evolution of SN 2012ec shows it to be aType IIP SN, discovered only a few days post-explosion (<6 d). We derive a luminosity for the progenitor, in comparison with MARCS model spectral energy distributions, of log L/L⊙ = 5.15 ± 0.19, from which we infer an initial mass rangeof 14-22M⊙. This is the first SN with an identified progenitor to be followed by the Public ESO Spectroscopic Survey of Transient Objects (PESSTO).
U2 - 10.1093/mnrasl/slt017
DO - 10.1093/mnrasl/slt017
M3 - Journal article
SN - 0035-8711
VL - 431
SP - L102-L106
JO - Royal Astronomical Society. Monthly Notices
JF - Royal Astronomical Society. Monthly Notices
IS - 1
ER -