File:Twin-Quasar or Double Quasar gravitational lensed QSO 0957 QSO561 AB.jpg
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Size of this preview: 795 × 600 pixels. Other resolutions: 318 × 240 pixels | 637 × 480 pixels | 1,018 × 768 pixels | 1,280 × 965 pixels | 2,560 × 1,931 pixels | 3,072 × 2,317 pixels.
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DescriptionTwin-Quasar or Double Quasar gravitational lensed QSO 0957 QSO561 AB.jpg |
English: "The Twin Quasar (also known as Twin QSO, Double Quasar, SBS 0957+561, TXS 0957+561, Q0957+561 or QSO 0957+561 A/B), was discovered in 1979 and was the first identified gravitationally lensed object. It is a quasar that appears as two images, a result from gravitational lensing caused by the galaxy YGKOW G1 that is located in the line of sight between Earth and the quasar."..."There is a 417 ± 3 day time lag between the two images." (A light reaches Earth 14 months before B light) Source: <a href="https://en.wikipedia.org/wiki/Twin_Quasar" rel="noreferrer nofollow">en.wikipedia.org/wiki/Twin_Quasar</a>
I wondered if i could image this close pair with the Esprit 100 (550 mm focal length)/ QHY16200 CCD combo. After test images i decided to use 120 seconds, shoot a lot of subs and use 2 x drizzle in APP. The Arcsinh stretch in pixinsight worked best followed by careful curve adjustment. The inset upper-left is a 500% blow-up. |
Date | |
Source | Own work |
Author | Keesscherer |
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This file is made available under the Creative Commons CC0 1.0 Universal Public Domain Dedication. | |
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http://creativecommons.org/publicdomain/zero/1.0/deed.enCC0Creative Commons Zero, Public Domain Dedicationfalsefalse |
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 11:39, 17 October 2019 | 3,072 × 2,317 (3.26 MB) | Keesscherer (talk | contribs) | User created page with UploadWizard |
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