deletions | additions       diff --git a/Around_the_same_time_that__.tex b/Around_the_same_time_that__.tex  index 3f27372..1da096f 100644  --- a/Around_the_same_time_that__.tex  +++ b/Around_the_same_time_that__.tex 
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Around the same time that magnetars were proposed, a realization had emerged that $\gamma$-ray bursts GRBs  could have cosmological origin. This would require a total energy of $\sim 10^{51} \ \rm erg$ to explain the observed flux assuming isotropic emission (e.g. \citealp{Paczynski_1991}). Interestingly, \cite{Usov_1992} \citet{Usov_1992}  proposing highly magnetized neutron stars as central engines of these bursts was published only a day after \cite{Duncan_1992}. \citet{Duncan_1992}. The proposed scenario is such that a magnetar forms from a white dwarf via accretion induced collapse (AIC). The WD magnetic field of $\sim 10^9 \ \rm G$ is amplified to $10^{15} \rm \ G$ by magnetic flux conservation. The rotational period of $\sim 1 \ \rm ms$ is a result of angular momentum conservation.   \citet{Duncan_1992} also briefly mentioned this scenario as a possible explanation for cosmological GRBs.