File:XTE J1118+480.tif
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Size of this JPG preview of this TIF file: 766 × 600 pixels. Other resolutions: 307 × 240 pixels | 613 × 480 pixels | 981 × 768 pixels | 1,280 × 1,003 pixels | 2,224 × 1,742 pixels.
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[edit]DescriptionXTE J1118+480.tif |
English: This Chandra X-ray Observatory image is a spectrum of a black hole, which is similar to the colorful spectrum of sunlight produced by a prism. The X-rays of interest are shown here recorded in the bright stripe that runs rightward and leftward from the center of the image. These X-rays are sorted precisely according to their energy with the highest-energy X-rays near the center of the image and the lower-energy X-rays farther out. The spectrum was obtained by using the Low Energy Transmission Grating (LETG), which intercepts X-rays and changes their direction by amounts that depend sensitively on the X-ray energy. The LETG is activated by swinging an assembly into position behind the mirrors and in front of the instrument that detects the X-rays. The assembly holds 540 gold transmission gratings; when in place behind the mirrors, the gratings intercept the X-rays reflected from the telescope. The bright spot at the center is due to a fraction of the X-ray radiation that is not deflected by the LETG. The spokes that intersect the central spot and the faint diagonal rays that flank the spectrum itself are artifacts due to the structure that supports the LETG grating elements
A team of scientists led by Jeffrey McClintock (Harvard-Smithsonian Center for Astrophysics) used the LETG in conjunction with the Advanced CCD Imaging Spectrometer (ACIS) detector to observe the black hole binary system known as XTE J1118+480 for 27,000 seconds on April 18, 2000. This "X-ray nova," so-called because it undergoes occasional eruptions followed by long periods of dormancy, contains a Sun-like star orbiting a black hole. |
Date | May 7, 2001 |
Source | https://chandra.harvard.edu/photo/2001/xtej1118/ |
Author | NASA/CfA/J.McClintock & M.Garcia |
Licensing
[edit]Public domainPublic domainfalsefalse |
This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.) | ||
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current | 10:25, 8 September 2023 | 2,224 × 1,742 (974 KB) | Юрий Д.К. (talk | contribs) | Uploaded a work by NASA/CfA/J.McClintock & M.Garcia from https://chandra.harvard.edu/photo/2001/xtej1118/ with UploadWizard |
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Image title | This Chandra X-ray Observatory image is a spectrum of a black hole, which is similar to the colorful spectrum of sunlight produced by a prism. These data reveal that a flaring black hole source has an accretion disk that stops much farther out than some theories predict. Scientists theorize that the accretion disk is truncated there as the material erupts into a hot bubble of gas before taking its final plunge into the black hole. This provides a better understanding of how energy is released when matter spirals into a black hole. |
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Author | Chandra X-ray Observatory Center |
Copyright holder | http://chandra.harvard.edu/photo/image_use.html |
Width | 2,224 px |
Height | 1,742 px |
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Compression scheme | LZW |
Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Number of rows per strip | 39 |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Data arrangement | chunky format |
Software used | Adobe Photoshop CS3 Macintosh |
File change date and time | 00:36, 5 March 2008 |
Exif version | 2.21 |
Color space | Uncalibrated |
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