extent of the envelope the true core reversal marking the SN explosion would have occurred a few hours earlier (e.g., SN 1987A) or a few days earlier for a red supergiant envelope $\sim 50000{\mbox{$R_{\odot}$}}$ [@quimby07].

In Figure \[fig:rotse\], ‘$t_{p}$’ (+5.3 d) corresponds to the peak of the ROTSE $R$-band light curve. A similar peak in the UV light curves of the post-shock breakout phase of the Type IIP supernova SNLS-04D2dc lasting several days was identified as a secondary peak and this peak was explained as the shift of the spectral energy distribution toward longer wavelengths due to the rapid fall in temperature during free adiabatic expansion of optically thick plasma lead by a collisionless shock (@schawinski08 [@tominaga09]). For we identify the peak in the ROTSE $R$-band curve as a secondary peak and also speculate that for a few other type IIP SNe such as 1999em, 1999gi and 2005cs, where very tiny peaks before the plateau light curve were observed, such features are basically the footprints of the secondary peaks which could be a consequence of shock breakout.

The Plateau and Nebular Phase {#res:PlatNeb}
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The entire UV, optical and NIR light curves of  are shown in Figure \[fig:lightcur\] and for 