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Unsharp mask copying of deep plate of the radio
galaxy Centaurus A (NGC 5128) revealed a series of shells that were
identified as merger remnants in a plate taken by John Graham on the
Cerro Tololo 4m Telescope. One of the inner shells is better seen on
our colour picture, which also shows
the innermost shell in the NE (upper left) quadrant. Another colour image made with an unsharp mask
shows much detail in the dustlane of this fascinating galaxy The
print from which this picture was made was published in Astrophysical Journal
Letters in 1983.
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