Now that Dr van Paradijs's team, and another led by Kailash Sahu at the Space Telescope Science Institute in Baltimore, have had time to look properly at the fading point of light, they have noticed a faint fuzz around it that looks as if it could be a galaxy playing host to a dramatic explosion.
To be seen from the earth they would need to put out a billion times more power even than a supernova (a stellar explosion which, in turn, can outshine an entire galaxy of 100 billion stars).