and a paper on atmo detection, by looking for temperature albedo and whether tidal locking heat distribution is measurable. Looks like a yes, when JWST is up there.

http://astrobiology.com/2016/08/prospects-for-characterizing-the-atmosphere-of-proxima-centauri-b.html

http://arxiv.org/abs/1608.07345

and this one shows a thin atmo is enough to distribute heat to the darkside http://astrobiology.com/2016/08/tutorial-models-of-the-climate-and-habitability-of-proxima-centauri-b.html