wcs_and_other_modules

The WCS module manages transformations between pixel coordinates in images and world coordinates (e.g., celestial coordinates).

Skills
Scientific
0

What it does and how to use it

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Install (Claude Code)

mkdir -p .claude/skills/wcs-and-other-modules && curl -fsSL https://doutorai.pt/data/lib/skills__wcs-and-other-modules.md -o .claude/skills/wcs-and-other-modules/SKILL.md

Paste this command into the terminal, in your project folder, and the component installs automatically.

Content

# WCS and Other Astropy Modules

## World Coordinate System (astropy.wcs)

The WCS module manages transformations between pixel coordinates in images and world coordinates (e.g., celestial coordinates).

### Reading WCS from FITS

```python
from astropy.wcs import WCS
from astropy.io import fits

# Read WCS from FITS header
with fits.open('image.fits') as hdul:
    wcs = WCS(hdul[0].header)
```

### Pixel to World Transformations

```python
# Single pixel to world coordinates
world = wcs.pixel_to_world(100, 200)  # Returns SkyCoord
print(f"RA: {world.ra}, Dec: {world.dec}")

# Arrays of pixels

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