Abstract
Following the GRB 170817A prompt emission lasting a fraction of a second, [Formula: see text][Formula: see text]s of data in the X-rays, optical, and radio wavelengths have been acquired. We here present a model that fits the spectra, flux, and time variability of all these emissions, based on the thermal and synchrotron cooling of the expanding matter ejected in a binary white dwarf merger. The [Formula: see text] of ejecta, expanding at velocities of [Formula: see text][Formula: see text]cm[Formula: see text]s[Formula: see text], are powered by the newborn massive, fast rotating, magnetized white dwarf with a mass of [Formula: see text], a rotation period of [Formula: see text][Formula: see text]s, and a dipole magnetic field [Formula: see text] G, born in the merger of a [Formula: see text] white dwarf binary. Therefore, the long-lasting mystery of the GRB 170817A nature is solved by the merger of a white dwarf binary that also explains the prompt emission energetics.
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