File:The gravitational lens system UM673 (eso8715a).tif
Original file (1,782 × 1,260 pixels, file size: 5.75 MB, MIME type: image/tiff)
Captions
Summary[edit]
DescriptionThe gravitational lens system UM673 (eso8715a).tif |
English: This photo shows a newly discovered gravitational lens system and the galaxy that causes this effect. To the left are seen the two lensed stellar-like images of the quasar UM673; the magnitude of the brighter (A) is 17 and that of the fainter (B) is 19. The angular distance between A and B is 2.2 arcsec., i.e. approximately equal to one thousandth the angle under which we see the solar (or lunar) disk from Earth. The intervening galaxy (C) which is responsible for the gravitational bending of the quasar light, and thus for the formation of the two images of the same object, is seen on the right, together with another galaxy (D), possibly a member of the same cluster of galaxies. The right-hand picture was computer enhanced and the two images of the quasar have been removed in order to show better the faint lensing galaxy. This is why the background is rather uneven and the individual picture elements (pixels) are visible. The CCD frame was obtained with the EFOSC instrument attached to the Cassegrain focus of the ESO 3.6m telescope. One pixel = 0.338 arcsec. The scale is indicated. North is up and East to the left. (ESO Press Release eso8715; BW) |
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Date | 22 October 1987 (upload date) | ||
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Author | ESO | ||
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Licensing[edit]
This media was created by the European Southern Observatory (ESO).
Their website states: "Unless specifically noted, the images, videos, and music distributed on the public ESO website, along with the texts of press releases, announcements, pictures of the week, blog posts and captions, are licensed under a Creative Commons Attribution 4.0 International License, and may on a non-exclusive basis be reproduced without fee provided the credit is clear and visible." To the uploader: You must provide a link (URL) to the original file and the authorship information if available. | |
This file is licensed under the Creative Commons Attribution 4.0 International license.
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File history
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 22:42, 29 October 2023 | 1,782 × 1,260 (5.75 MB) | OptimusPrimeBot (talk | contribs) | #Spacemedia - Upload of https://www.eso.org/public/archives/images/original/eso8715a.tif via Commons:Spacemedia |
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Metadata
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Author | Zeutschel Omniscan 11 |
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Width | 1,782 px |
Height | 1,260 px |
Bits per component |
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Compression scheme | LZW |
Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Number of rows per strip | 49 |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Data arrangement | chunky format |
Software used | Adobe Photoshop CS3 Windows |
File change date and time | 18:11, 10 December 2009 |
Color space | Uncalibrated |