GCRT J1745-3009 as a transient white dwarf pulsar

A transient radio source in the direction of the Galactic center, GCRT J1745 - 3009, exhibited five peculiar consecutive outbursts at 0.33 GHz with a period of 77.13 minutes and a duration of similar to 10 minutes for each outburst. It has been claimed to be the prototype of a hitherto unknown class of transient radio sources. We interpret it as a transient white dwarf pulsar with a period of 77.13 minutes. The similar to 10 minute flaring duration corresponds to the epoch in which the radio beam sweeps our line of sight. The bursting epoch corresponds to the episodes in which stronger sunspot-like magnetic fields emerge into the white dwarf polar cap region during which the pair-production condition is satisfied and the white dwarf behaves like a radio pulsar. It switches off as the pair-production condition breaks down.