These two sources had low temperature disk components, which was interpreted as possible evidence for the presence of an intermediate-mass black hole. However, while the low-energy emission can be modelled as a low-temperature disk, the high-energy emission is at odds with the intermediate-mass black hole hypothesis.
The observation of two sources with low-temperature disk components led to speculation about the possibility of an intermediate-mass black hole. Nevertheless, while the low-energy radiation can be explained as coming from a low-temperature disk, the high-energy radiation is at odds with the idea that such a black hole exists.