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Maser bursts from the sun.

Maser bursts from the sun

For the first time, solar astronomers have observed bursts of coherent radio waves coming from a specific location on the sun's surface. The bursts emanate from a maser (the radiowave equivalent of a laser) operating in the intense magnetic field of a large sunspot. The emissions are generated when high-speed electrons, whipped up in a solar flare, enter a nearby region in which converging magnetic field lines trap and reflect some electrons while allowing others through. This solar maser produces short pulses of electromagnetic radiation about 0.1 to 0.2 second long and billions of times brighter than radiation of the same wavelength produced on the sun by other processes, report Dale E. Gary and his colleagues at the California Institute of Technology in Pasadena.
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Title Annotation:radiowave equivalent of a laser
Author:Peterson, Ivars
Publication:Science News
Date:Jun 23, 1990
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