ASASSN-15nx: A Luminous Type II Supernova with a “Perfect” Linear Decline
ASASSN-15nx: A Luminous Type II Supernova with a “Perfect” Linear Decline
We report a luminous Type II supernova, ASASSN-15nx, with a peak luminosity of M_V=-20 mag, that is between typical core-collapse supernovae and super-luminous supernovae. The post-peak optical light curves show a long, linear decline with a steep slope of 2.5 mag/100 days (i.e., an exponential decline in flux), through the …