| Issue |
A&A
Volume 695, March 2025
|
|
|---|---|---|
| Article Number | A50 | |
| Number of page(s) | 7 | |
| Section | Numerical methods and codes | |
| DOI | https://doi.org/10.1051/0004-6361/202452218 | |
| Published online | 04 March 2025 | |
Accurate astrometry for images with super-wide fields of view
1
National Astronomical Observatories, Chinese Academy of Sciences,
Beijing
100101,
China
2
School of Physics, University of New South Wales,
Sydney
NSW 2052,
Australia
3
School of Physics and Astronomy, Sun Yat-Sen University,
Zhuhai
519082,
China
★ Corresponding author; huyi.naoc@gmail.com
Received:
12
September
2024
Accepted:
6
February
2025
Cameras with a super-wide field of view, defined here as being at least 20 degrees on one side, are widely used in site testing and time-domain astronomy. However, they intrinsically require optics with non-linear projections, making it challenging to use traditional astrometric methods. We have developed a generalized astrometric method that is applicable to images with super-wide fields of view. We applied the method to images from an all-sky camera and obtained the astrometric solutions. The positional accuracy we achieve in analysing 5170 all-sky images is typically 0.4 pixels in (x, y). Our method is a generalized method suitable for all images with super-wide fields of view.
Key words: methods: data analysis / techniques: photometric / astrometry
© The Authors 2025
Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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