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Under the assumption that jets explode core collapse supernovae in a negativejet feedback mechanism (JFM), I show that rapidly rotating neutron stars arelikely to be formed when the explosion is very energetic. Under the assumptionthat an accretion disk or an accretion belt around the just-formed neutron starlaunch jets and that the accreted gas spins-up the just-formed neutron star, Iderive a crude relation between the energy that is stored in the spinningneutron star and the explosion energy. This relation readsEspin/Eexp~(Eexp/1e52erg). It shows that within the frame of the JFM explosionmodel of core collapse supernovae, spinning neutron stars, such as magnetars,might have significant energy in super-energetic explosions. The existence ofmagnetars, if confirmed, such as in the recent super-energetic supernovaGAIA16apd, further supports the call for a paradigm shift from neutrino-drivento jet-driven core-collapse supernova mechanisms.

The magnetar model of the superluminous supernova GAIA16apd and the explosion jet feedback mechanism (JFM)