David Shupe
Caltech/IPAC

Frank Masci
Caltech/IPAC

Russ Laher
Caltech/IPAC

Ben Rusholme
Caltech/IPAC

Lee Armus
Caltech/IPAC

Video: https://youtu.be/2GTLkH5sfJc

Abstract

Packages developed under the auspices of the Astropy Project (astropy2013, astropy2018) address many common problems faced by astronomers in their computational projects. In this paper we describe how capabilities provided by Astropy have been employed in two current projects. The data system for the Zwicky Transient Facility processes a terabyte of image data every night, with a lights-out automated pipeline that produces difference images about ten minutes after the receipt of every exposure. Astropy is used extensively in the astrometry and light-curve-generation modules, making especially heavy use of FITS header manipulation, table I/O, and coordinate conversion and matching. The second project is a web application made with Plotly Dash for proposal studies for the Origins Space Telescope. The astropy.cosmology module provided easy redshifting of our template galaxy spectrum, and astropy.units enabled the porting of an instrument sensitivity function to Python, with verification that a very complex combination of units resulted in a dimensionless signal-to-noise value.

Keywords

astronomy, data processing

DOI

10.25080/Majora-4af1f417-006

Bibtex entry

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Copyright © 2018 David Shupe et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.