Anomalous X-ray pulsar (AXP) 1E 1048.1-5937 was the first AXP ever observed to emit an SGR-like X-ray burst.
The Anomalous X-ray pulsar (AXP) 1E 1048.1-5937 was the initial AXP observed to emit a burst similar to that of a Soft Gamma Repeater (SGR).