  The available spectra of the anomalous supernova ASASSN-15nx permit us to
rule out the radioactivity and circumstellar interaction as the luminosity
source. I propose an alternative mechanism for the ASASSN-15nx luminosity based
on the interaction of the neutron star rotating magnetosphere with the
gravitationally bound material of the envelope ejected by the shock wave. In
the regime of the stationary accretion the rotational frequency decreases
exponentially with time, which could account for the linearity of the light
curve. The modelling of the light curve at the stage of the luminosity rise in
combination with the expansion velocity implies the low mass of ejecta, ~ 1
M_{\odot}. The profile of the [O\,I] 6300, 6364\,\AA\ doublet indicates the
asphericity of the oxygen distribution, which in turn suggests the aspherical
explosion.
