I was curious whether or not the fact that P_moon being 29.6 (in their data) and P_algol being 2.85 would lead to the chance that they were measuring some other

I was curious whether or not the fact that P_moon being 29.6 (in their data) and P_algol being 2.85 would lead to the chance that they were measuring some other fraction of the periodicity of the Moon, more specifically, 2.96 – which is P_moon divided by the length of an Ancient Egyptian week of 10 days. The linked article doesn't discuss this (that I can find), but an article the same authors posted to Arxiv in 2012 (and updated thereafter) does discuss this and they found that the two periodicities are completely out of phase, so that's pretty neat: http://arxiv.org/abs/1204.6206 http://arxiv.org/abs/1204.6206