Scientific Reports 6: Article number: 22546; published online: 04 March 2016; updated: 20 April 2016.

The Acknowledgements section in this Article is incomplete.

“This work has been supported by the Russian Fund for Basic Research within the project 16-52-00112. The calculations of multipole moments and fields has been supported by the Russian Science Foundation Grant No. 16-12-10287.”

should read:

“This work has been supported by the Russian Fund for Basic Research within the project 16-52-00112. A.S.S. acknowledges the support of the President of Russian Federation in the frame of Scholarship SP-4248.2016.1. The calculations of multipole moments and fields has been supported by the Russian Science Foundation Grant No. 16-12-10287.”