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NGC 1637 Time-Lapse Movie
The animation shows the NOAO optical image of the
spiral galaxy NGC 1637, followed by seven individual Chandra X-ray
images obtained on days 4 to 633 after the outburst of the supernova
(SN 1999em). The bright X-ray source located East of the center of
the galaxy is the black hole candidate. Most X-ray sources vary dramatically
during the period covered by the Chandra observations. (The apparent
variability of the diffuse emission is an artifact caused by the different
sensitivities of the individual observations.) Next, the combined
X-ray image is overlaid onto the optical image, which finally fades
into an expanded central view of NGC 1637 from the Hubble Space Telescope.
View Stills.
[Run time = 58 sec]
(Animation: NASA/CXC) |
