  We provide a general analysis on the properties of emitting material of some
rapidly evolving and luminous transients discovered recently with the
Pan-STARRS1 Medium Deep Survey. It is found that these transients are probably
produced by a low-mass non-relativistic outflow that is continuously powered by
a newly born, rapidly spinning, and highly magnetized neutron star. Such a
system could originate from an accretion-induced collapse of a white dwarf or a
merger of a neutron star-neutron star binary. Therefore, observations to these
transients would be helpful for constraining white dwarf and neutron star
physics and/or for searching and identifying gravitational wave signals from
the mergers.
