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• by arianna99

  Notice the even horizontal striation patterns all along this image from top to bottom, they appear evenly spaced, as if ridges from some type of background energy. Like waves in a pool. . . .

  Posted January 21, 2015 5:10 AM

• by JeanTate in response to arianna99's comment.

  This is normal in radio 'images' which are derived from the kind of survey being used in this image (ATLAS). They are a kind of artifact, and are produced in all such images which originate from 'interferometry' (this is where the 'image' is built up by combining signals from many separate radio 'dishes'*, spread out in an array).

  The 'shape' of the array of dishes determines the kind of artifact you see in the resulting image; in the FIRST images, for example, the artifacts take the form of a triangular mesh, which is caused by the fact that the dishes are arranged in a Y shape.

  Hope this helps.

  *they don't have to be dishes! Simply detectors

  Posted January 22, 2015 5:00 PM

• by ivywong scientist, admin

  Thanks @JeanTate.

  Posted January 23, 2015 5:51 AM