Metallicity from Type II supernovae from the (i)PTF

F. Taddia, P. Moquist, J. Sollerman, A. Rubin, G. Leloudas, A. Gal-Yam, Iair Arcavi, Y. Cao, Alexei V. Filippenko, M. L. Graham, P. A. Mazzali, P. E. Nugent, Y. -C. Pan, Jeremy M Silverman, D. Xu, Ofer Yaron