Check provenance of CTN finite size optic correction
Kentaro points out that the reference to Braginsky and Vyatchanin that we have in the comments of getCoatFiniteCorr()
is a slippery one. We cite both the published version and the arXiv. The latest version on the arXiv is subsequent to the published version, and fixes an uncorrected error in the published version. Just to make sure nobody's confused, we should double-check that we have the right formula, and document this situation better in the comments. He suggests we compare with his independent calculation published here: https://doi.org/10.1103/PhysRevD.79.102004.