Radio Sources Flares and Disappears (IMAGE) University of California - Berkeley Caption The radio source -- an orphan gamma ray burst -- flared and died out over a period of 25 years. Now very faint, its peak brightness in 1993 was more than 50 times what it is today. Credit NRAO Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.