XRT Picture of the Week (XPOW)

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2015 April 21

Click for movie. Also available on YouTube.

The Transit of AR12320

Hinode will often track an active region as it crosses the solar disk. Scientists use this type of data to determine what conditions are present before a solar flare or coronal mass ejection. Hinode tracked AR12320 from 2015 April 7-14 and observed it using multiple filters. Hinode paused these observations twice a day so that XRT could take full disk images. The above movie is a composite of the full disk images taken with the thin_Be filter and the small frames are Al_poly images of the active region.

The movie illustrates how the active region evolves as the sun rotates. The time stamp at the bottom of the image is the time XRT took the full disk images. XRT observed several small flares from this active region and just as it neared the west limb, a bright new active region, AR12321, can be seen on the opposite side of the sun.

Keywords: AR Tracking
Filters: thin_Be, Al_poly

(Prepared by Patricia Jibben)

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