View Full Version : You've Got to Be Fast to Spot Burst Afterglows

2005-Sep-22, 08:43 AM
SUMMARY: Until recently, astronomers thought that nearly two-thirds of gamma ray bursts - the most powerful known explosions in the Universe - don't seem to leave an afterglow. It turns out, they just weren't looking quickly enough. Gamma-ray bursts explode suddenly, last for only a few fractions of a second and then disappear. All that's left is the afterglow, which astronomers can study to try to understand what caused the explosion. NASA's HETE spacecraft has quickly determined the positions of 15 gamma-ray bursts and passed this info along to astronomers to follow up with optical telescopes. In this case, only one hasn't had an afterglow. So, it appears afterglows are common, you just need to look quickly.

View full article (http://www.universetoday.com/am/publish/dark_gamma_ray_bursts.html)
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