An explosion 11 billion years ago, billion times brighter than sun

January 9th, 2009 - 1:43 pm ICT by IANS  

Sydney, Jan 9 (IANS) The Zadco telescope has recorded a massive gamma ray burst that happened 11 billion years ago, long before our own planet had even been formed. The burst was a billion times brighter than our sun.”As if seeing one of the biggest explosions in the universe wasn’t dramatic enough, we had a catastrophic computer crash on the night,” said David Coward, University of Western Australia (UWA) senior research fellow and Zadko Project leader.

“We had nothing to record the images with, so team member Timo Vaalsta used a cheap video camera instead of the sophisticated astronomy camera that wasn’t working.”

“We were able to capture images of the event before the European Southern Observatory, the site of the most expensive and biggest telescopes in the world.”

“If a similar explosion happened in our galaxy today, it could result in mass extinctions on earth. In fact, the explosion was about a billion times brighter than our sun, so we are lucky that they seem to occur more frequently in the very distant universe,” said Coward.

Remarkably, the UWA physics team were not sure that they had captured the explosion until weeks later. By comparing the image of the sky using the NASA satellite location, they discovered a faint glow that shouldn’t be there, right at the location later reported by the European Southern Observatory.

This glow they found is the signature of a remarkable event - the death of a star and the birth of a black hole, said a UWA release.

In December, the team reported their observations to NASA, who distributed the report to observatories around the globe. The Zadko Telescope was the only facility in Australia to detect the 11 billion year old light from this one off event.

“The image we recorded is a window in time, allowing us to peer into the distant past to a time when the universe was very exotic,” Coward said. “We are discovering the richness of this transient universe, one that is filled with brief but extremely bright flashes.”

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