We present the results of the quest for ring-type structures on the maps observed by the Planck satellite. The results show that the vicinity of one radius ({\gamma} = 0.14 radians) of the rings is distinguished. Twisting the circles into deformed ellipses gives a pronounced drop of significance with the increase of twisting.
Cite
@article{arxiv.1510.06537,
title = {Ring Type Structures in the Planck map of the CMB},
author = {Daniel An and Krzysztof A. Meissner and Pawel Nurowski},
journal= {arXiv preprint arXiv:1510.06537},
year = {2016}
}