Fast Extragalactic X-ray Transients From Binary Neutron Star Mergers

The observed light curvesand the estimated full skyrate of the extragalactic fast x-ray transients, recently discovered with the Chandra x- rayobservatory, indicate that they are early time x- ray afterglowsof short gamma ray bursts(SGRBs) which point away from Earth. Their light curvesare indistinguishable from those of the early time X- ray afterglowsof SGRBs which point to Earth. Their full skyrate is consistent with the estimated rate of newly born millisecond pulsarsin binary neutron stars mergers whose spin down seems to power the early time isotropic afterglowof SGRBs.