■ [supernova] Type IIP SNe 2008ij and 2008in have just come in the rapidly decreasing luminosity phase
figure(a) : Light curve of SN 2008ij
figure(b) : Light curve of SN 2008in
We show the light curves of two Type IIP supernovae (SNe IIP) 2008ij and 2008in in figure(a) and figure(b), respectively. The "TRI" and "HOW" mean that the data was obtained using TRISPEC and HOWPol, respectively. The two SNe has begun to rapidly decrease the luminosity, and the color of two SNe rapidly become red. The outer hydrogen layer of SNe IIP expanded and became optically thin. The spectral might show that the Balmer series of hydrogen lines weaken.