File:2019 S 1 shift-and-add demonstration.png
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Summary
| Description |
English: This image demonstrations the application of the shift-and-add technique to the detection of a faint moon of Saturn (S/2019 S 1; circled in red). In the shift-and-add technique, multiple images shifted to the on-sky motion of S/2019 S 1, stacked, and then added together as a single composite image (shown below). Although the moon is barely visible in a single-exposure image (shown above), the repeated addition of the moon's marginal signal with many different images enables the moon to be visible against background noise (because noise is random brightness fluctuations across each image, noise cancels out when many images are added).
The images of S/2019 S 1 here were taken by the Canada-France-Hawaii Telescope (CFHT) on 2 July 2019. Each frame is a 205-second exposure in the wild-band GRI filter, with mid-exposure times starting from 1 July 2019 09:16 to 10:14 UT. The frames are separated by approximately 4-minute intervals. North is up and East is left. |
| Date | |
| Source | Raw images provided by the Canadian Astronomy Data Centre's Solar System Object Image Search. Own work |
| Author | Edward Ashton/CFHT/Canadian Astronomy Data Centre, processed by Nrco0e |
| Permission (Reusing this file) |
This image was publicly provided from the Canadian Astronomy Data Centre, which states that "Data held in the CADC archive are open as part of the Government of Canada's Open Science Commitment. Data deposited into the CADC archive are public domain and made available under the Creative Commons License CC BY 4.0." (https://www.cadc-ccda.hia-iha.nrc-cnrc.gc.ca/en/about.html) |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 01:30, 14 March 2025 | | 900 × 1,200 (616 KB) | Nrco0e | Uploaded own work with UploadWizard |
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