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File:GRB 110328A (captured by the Hubble Space Telescope).jpg

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NASA's Hubble Space Telescope has pinpointed the source of one of the most puzzling blasts of high-energy radiation ever observed. It is at the very center of a small, distant galaxy, which appears to be sending a beam of radiation directly toward Earth.

The 3.8-billion-light-year-distant galaxy appears as a bright blob at the center of the Hubble picture.

This observation may support the idea that a supermassive black hole at the core of the galaxy has gravitationally torn apart and swallowed a bypassing star. As the star's gas falls onto the black hole, radiation is ejected along a narrow beam.

On March 28, 2011, NASA's Swift satellite, which looks for transient X-rays and gamma rays, detected the first of a string of powerful bursts of high-energy radiation that has lasted for a week.

More Hubble observations are planned to see if the core changes brightness. An armada of ground- and space-based telescopes is also watching the object from X-ray through radio wavelengths. The Hubble observations were taken in visible and near-infrared light on April 4, 2011, with the Wide Field Camera 3. This Hubble image was taken in visible light.
日期
来源 http://hubblesite.org/newscenter/archive/releases/2011/10/image/b/ (direct link)
作者 NASA, ESA, and A. Fruchter (STScI)
Public domain 本文件完全由NASA创作,在美国属于公有领域。根据NASA的版权方针,NASA的材料除非另有声明否则不受版权保护。(参见Template:PD-USGov/zhNASA版权方针页面JPL图片使用方针。)
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