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More Images of NGC 1637
1
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Day 4
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Day 16
Jpeg, Tiff, PS
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Day 49
Jpeg, Tiff, PS
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Day 102
Jpeg, Tiff, PS
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Day 368
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Day 495
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Day 633
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Chandra X-ray Images of NGC 1637
A series of 7 individual Chandra observations of the spiral galaxy NGC 1637 has provided a dramatic view of a violent, restless nature. The days listed under the images are the number of days the Chandra observation occurred after the discovery of SN 1999em on October 29, 1999. The bright X-ray source located east (right) 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.) View the animation.
Scale: Image is 8.5 arcmin per side
(Credit: NASA/CXC/Penn State/S. Immler et al.)
2
Merged Chandra X-ray Image of NGC 1637, Full Field
This X-ray image of the spiral galaxy NGC 1637 contains the data from 7 different observations made with the Chandra X-ray Observatory. This combined image clearly shows the black hole candidate, Supernova 1999em, and the diffuse emission around the central source. Note that this merged Chandra image captures a slightly larger field-of-view than is shown in the individual observations above.
Scale: Image is 14 arcmin per side
(Credit: NASA/CXC/Penn State/S. Immler et al.)

3
NOAO Optical Image of NGC 1637
This visible-light image was obtained on October 30, 1999, right after the discovery of Supernova 1999em, which is visible as a bright white source south-west of the nucleus of the galaxy. The telescope used for this observation was the 0.9-meter at the Cerro Tololo Inter-American Observatory in Chile. In this image, north is up, and east is to the left.
Scale: Image is 8.5 arcmin per side
(Credit: NOAO/AURA/NSF/N. Suntzeff)

4
X-ray/Optical Overlay of NGC 1637
This composite image contains both X-ray data from Chandra and optical data taken at the Cerro Tololo Inter-American Observatory in Chile. Optically, the galaxy NGC 1637 is a stately spiral lit by the glow of about fifty billion stars slowly evolving over millions and billions of years.
(Credits: X-ray: NASA/CXC/Penn State/S. Immler et al.; Optical: NOAO/AURA/NSF/N. Suntzeff)

5
Hubble Optical Image of NGC 1637, Close-Up
This visible-light image of NGC 1637 was produced by combining the data from 36 individual observations made with the Hubble Space Telescope between September 2, 2001 and October 31, 2001, roughly two years after the explosion of SN 1999em. The images were made with the Wide Field and Planetary Camera 2. In this image, north is up, and east is to the left.
Scale: 2.6 arc-min along the 2 longest sides
(Credit: NASA/STScI/UMass/D. Leonard et al.)

6
Chandra X-ray Image with Scale Bar
Scale bar = 2 arcmin
Credit: NASA/CXC/Penn State/S. Immler et al.


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