[英]How to match extracted spots from star image to star catalog
I have used https://photutils.readthedocs.io/en/stable/ to extract star spots from my FITS image, which is relatively easy and neatly managed in python.我使用https://photutils.readthedocs.io/en/stable/从我的 FITS 图像中提取星点,这在 python 中相对容易且整齐地管理。
Now I want to match extracted "possible" stars from my image to a stars from the catalog to get star RA DEC coordinates of every pixel.现在,我想将图像中提取的“可能”星星与目录中的星星进行匹配,以获取每个像素的星星 RA DEC 坐标。 Has anyone done this already in python?
有没有人已经在python中做过这个? Or has some instructions?
或者有什么指示?
You can download, build and run the astrometry.net code locally您可以在本地下载、构建和运行 astrometry.net 代码
https://astrometrynet.readthedocs.io/en/latest/build.html https://astrometrynet.readthedocs.io/en/latest/build.html
http://astrometry.net/doc/readme.html#tricks-and-tips http://astrometry.net/doc/readme.html#tricks-and-tips
The solve-field program has optional parameters that speed up the search solve-field 程序具有加快搜索速度的可选参数
SOLVE-FIELD(1) astrometry.net SOLVE-FIELD(1)
NAME
solve-field - Main high-level command-line user interface.
SYNOPSIS
solve-field [options] [image-file-1 image-file-2 ...] [xyls-file-1
xyls-file-2 ...]
[...]
-3 RA, --ra RA
RA of field center for search, format: degrees or hh:mm:ss
-4 DEC, --dec DEC
DEC of field center for search, format: degrees or hh:mm:ss
-5 degrees, --radius degrees
Only search in indexes within 'radius' of the field center given
by --ra and --dec
-d, --depth number or range
Number of field objects to look at, or range of numbers; 1 is
the brightest star, so "-d 10" or "-d 1-10" mean look at the top
ten brightest stars only.
--objs int
Cut the source list to have this many items (after sorting, if
applicable).
[...]
-z, --downsample int
Downsample the image by factor int before running source extraction
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