At www.dailygalaxy.com August 14th … gamma rays were thought only to come from supernovae but amateur astronomers in Japan have changed that view. They imaged a change in brightness of a small star in the constellation of Cygnus, ten times brighter than it had been a couple of days before, and reported the discovery of a nova event, a short lived brightening of an otherwise inconspicuous star. Novas are thought to occur when a white dwarf in a binary system erupts in an enormous thermo-nucleur explosion. NASAs Swift Satellit observed the Nova in the days following and at NASAs LAT facility they detected gamma rays at the same time as the Nova was discovered.
NASA has already developed a theory to account for the gamma rays – read the article.