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A recent paper (arXiv:0804.3463) claims that the presence of a soft X-raycomponent in an X-ray source in NGC 6946 provides strong evidence that itsblack hole mass is definitely $>100\msun$, and more probably $\sim 400\msun$,even if the source is beamed.  I show that the data are instead very compatible with a black hole mass ofonly $5\msun$, radiating isotropically (i.e. no beaming) and a mass transferrate about 60 times the Eddington value, i.e. $1.25 \times 10^{-5} \msun {\rmyr}^{-1}$. Such a system is very similar to the probable descendant of theGalactic X-ray binary Cygnus X--1 once the supergiant companion evolves to fillits Roche lobe.

On `The spectral and temporal properties of an Ultra--Luminous X-ray source in NGC 6946', by Senorita Devi et al