The Electrically Charged Extreme BTZ Black Hole with Self (Anti-self) Dual Maxwell Field
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Recently M. Kamata and T. Koikawa claimed to obtain the charged version of the spinning BTZ black hole solution by assuming an (anti-) self dual condition imposed on the orthonormal basis components of the electric and magnetic fields. We point out that the Kamata-Koikawa field is not a solution of the Einstein-Maxwell equations and we find the correct solution of the studied problem. It is shown that a duality mapping exists among spinning solutions obtained from electrostatic and magnetostatic fields with the help of the local transformation $t\longrightarrow t-ωθθ\longrightarrow θ-ωt.$
11 pages, Latex. Submitted to Phys. Lett. B
11 pages, Latex. Submitted to Phys. Lett. B