Others question whether LHAASO's detection was a mistaken identity case. Maybe the high-energy photon happened to come from another source and its perfectly timed entry was merely an accident. 'I'm very skeptical,' astrophysicist Milena Crnogorevi of the University of Maryland said. 'I'm currently leaning toward it being a background event,' Racusin, deputy project scientist on the Fermi telescope, said. Also, a Russian observatory disclosed a blow by another higher-energy 251 TeV photon coming from the burst, but 'the jury's still out.'