The Velocity Aberration Effect of the CSST Main Survey Camera
Fuente:
arXiv
Enregistré dans:
| Auteurs principaux: | , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Publié: |
2024
|
| Sujets: | |
| Accès en ligne: | |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1866929471471222784 |
|---|---|
| author | Feng, Hui-Mei Cao, Zi-Huang Lam, Man I Li, Ran Tian, Hao Zhang, Xin Wei, Peng Li, Xin-Feng Wang, Wei Jones, Hugh R. A. Liu, Mao-Yuan Liu, Chao |
| author_facet | Feng, Hui-Mei Cao, Zi-Huang Lam, Man I Li, Ran Tian, Hao Zhang, Xin Wei, Peng Li, Xin-Feng Wang, Wei Jones, Hugh R. A. Liu, Mao-Yuan Liu, Chao |
| contents | In this study, we conducted simulations to find the geometric aberrations expected for images taken by the Main Survey Camera (MSC) of the Chinese Space Station Telescope (CSST) due to its motion. As anticipated by previous work, our findings indicate that the geometric distortion of light impacts the focal plane's apparent scale, with a more pronounced influence as the size of the focal plane increases. Our models suggest that the effect consistently influences the pixel scale in both the vertical and parallel directions. The apparent scale variation follows a sinusoidal distribution throughout one orbit period. Simulations reveal that the effect is particularly pronounced in the center of the Galaxy and gradually diminishes along the direction of ecliptic latitude. At low ecliptic latitudes, the total aberration leads to about 0.94 pixels offset (a 20-minute exposure) and 0.26 pixels offset (a 300-second exposure) at the edge of the field of view, respectively. Appropriate processings for the geometric effect during the CSST pre- and post-observation phases are presented. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_12929 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | The Velocity Aberration Effect of the CSST Main Survey Camera Feng, Hui-Mei Cao, Zi-Huang Lam, Man I Li, Ran Tian, Hao Zhang, Xin Wei, Peng Li, Xin-Feng Wang, Wei Jones, Hugh R. A. Liu, Mao-Yuan Liu, Chao Instrumentation and Methods for Astrophysics In this study, we conducted simulations to find the geometric aberrations expected for images taken by the Main Survey Camera (MSC) of the Chinese Space Station Telescope (CSST) due to its motion. As anticipated by previous work, our findings indicate that the geometric distortion of light impacts the focal plane's apparent scale, with a more pronounced influence as the size of the focal plane increases. Our models suggest that the effect consistently influences the pixel scale in both the vertical and parallel directions. The apparent scale variation follows a sinusoidal distribution throughout one orbit period. Simulations reveal that the effect is particularly pronounced in the center of the Galaxy and gradually diminishes along the direction of ecliptic latitude. At low ecliptic latitudes, the total aberration leads to about 0.94 pixels offset (a 20-minute exposure) and 0.26 pixels offset (a 300-second exposure) at the edge of the field of view, respectively. Appropriate processings for the geometric effect during the CSST pre- and post-observation phases are presented. |
| title | The Velocity Aberration Effect of the CSST Main Survey Camera |
| topic | Instrumentation and Methods for Astrophysics |
| url | https://arxiv.org/abs/2408.12929 |