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astropandas

Tools to expand on pandas functionality for astronomical applications. The code is publically hosted on github:

https://github.com/jlvdb/yet_another_wizz.git

Installation

The yet_another_wizz package can be installed directly with pip::

pip install astropandas

Features

  • directly read and write FITS table data, see astropandas.read_fits and astropandas.to_fits
  • match based on sky coordinates, see astropandas.match

Examples

Reading and writing FITS table files:

import astropandas as apd

data = apd.read_fits("myfile.fits", hdu=1)
# manipulate data ...
apd.to_fits(data, "mynewfile.fits")

Matching on angular coordinates:

import astropandas as apd

data1 = apd.read_fits("myfile1.fits")
data2 = apd.read_fits("myfile2.fits")

# Match within one arcsecond on right ascension (ra) and declination (dec),#
# labeled "RA" and "DEC" in the data.
# Here we assume that the column names are the same in both catalogues,
# otherwise specify with left_ra=, right_ra=, etc.
apd.match(
    left=data1, right=data2,
    ra="RA", dec="DEC",
    threshold=1/3600)
# If no threshold is provided, it is computed automatically by finding the
# distance at which the number of matches is almost stationary.