Energetics and optical properties of 6-dimensional rotating black hole in pure Gauss–Bonnet gravity Ahmadjon Abdujabbarov, Farruh Atamurotov, Naresh Dadhich, Bobomurat Ahmedov and Zdeněk Stuchlík Eur. Phys. J. C, 75 8 (2015) 399 Published online: 28 August 2015 DOI: 10.1140/epjc/s10052-015-3604-5