Disco Sun: X-Class Flare Creates Strobe-Light Effect
An active region just turning into view on the left side of the Sun has emitted three large flares since Saturday: an M9, an M5 and early today blasted out an X1.8 class flare. This flare occurred around 3:17 am UTC today (or 11:17 pm EDT on Oct. 22). The strobe-light-like effect visible in the video was created by the brightness of the flare and how the instruments on the Solar Dynamics Observatory responded to it. Phil Chamberlin, Deputy Project Scientist SDO told Universe Today that built in algorithms called ‘active exposure control’ compensate for the extra light coming in from a flare. It doesn’t always result in the strobe or fluttering effect, but the algorithms create shorter exposure time, and thus a dimmer, but still scientifically useful view of the entire Sun. The algorithms go into effect whenever there is an M class or higher flare.
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Post tags: Solar Dynamics Observatory (SDO), sun
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2012-10-23 17:03:08
Source: http://www.universetoday.com/98149/disco-sun-x-class-flare-creates-strobe-light-effect/
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