https://github.com/sub6resources/polars-astro

A collection of code to aid with processing data in astronomy using Polars
https://github.com/sub6resources/polars-astro

Last synced: 12 months ago
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A collection of code to aid with processing data in astronomy using Polars

• Host: GitHub
• URL: https://github.com/sub6resources/polars-astro
• Owner: Sub6Resources
• License: mit
• Created: 2025-04-04T21:49:27.000Z (over 1 year ago)
• Default Branch: main
• Last Pushed: 2025-04-04T22:33:45.000Z (over 1 year ago)
• Last Synced: 2025-04-04T22:37:16.627Z (over 1 year ago)
• Language: Python
• Size: 0 Bytes
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# polars_astro

A package adding support for common astronomy data files in Polars.

[![DOI](https://zenodo.org/badge/960686891.svg)](https://doi.org/10.5281/zenodo.15151274)

## Installing

`pip install polars_astro`

# Usage

### FITS Files

`scan_fits_file` adds support for reading in FITS files as a `LazyFrame` including

predicate pushdown and column projection. The python package fitsio (built around CFITSIO)

is used internally for efficient row/column access.

```python

import polars as pl

from polars_astro import scan_fits_table

scan_fits_table("astro_catalog.fits").filter(

    pl.col("parallax") > 0.1,

    pl.col("parallax_err") < 0.01

).select(

    pl.col("ID"),

    pl.col("pm_ra"),

    pl.col("pm_dec"),

    pl.col("B_mag"),

    pl.col("V_mag")

)

```