... Archives . ... The first time around, Voss & Nelemans ( arXiv:0802.2082 ) looked at how many X-ray sources there were around the candidate progenitor of SN2007on (they also looked at 4 more galaxies that hosted Type Ia SNe and that had X-ray data taken prior to the event, but didn?t find any other candidates), and estimated the probability of chance coincidence with the optical position. ... The last one??the probability that the two locations are the same is ~1%??is a Bayesian statement. ...