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This image represents a sequence of Chandra observations of the Crab Nebula taken from September 2010 through April 2011. During this period, dramatic variations are seen in the Crab, including the expansion of a ring of X-ray emission around the pulsar (white dot near the center) and changes in the knots within this ring. These variations, however, did not correlate with strong gamma-ray flares seen by the Fermi Gamma Ray Observatory and Italy's AGILE satellite during that period.
The Crab in Action & The Case of The Dog That Did Not Bark
Chandra X-ray Observatory Center
Crab Nebula
WCS retrieved using CXCs PinpointWCS
B.4.1.4
B.3.1.9.1
6500
Chandra
ACIS
Blue
X-ray
X-ray
0.8267
83.6346004
22.0131890
864.0
864.0
433.0
433.0
5.71534e-05
5.7153393e-05
-7.0601753888e-05
2.4754728142e-06
-6.3226331178e-06
5.7099757967e-05
http://chandra.harvard.edu/photo/image_use.html
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