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Accessing and using astronomical data: a series of Jupyter notebooks tutorials

Welcome to the repository of Strasbourg astronomical Data Center CDS jupyter notebooks.

<img align="right" width="20%" alt="CDS logo" src="Notebooks/Data/images/cds.png">

All tutorials here illustrate how astronomers can search, find, and access data they need from archives across the world. We offer a focus on archives compliant with Virtual Observatory (VO) protocols and standards, as defined by the International Virtual Observatory Alliance (IVOA).

Some tutorials hosted here are based on EURO-VO tutorials usually with the same or a similar name.

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Table of contents

• Accessing and using astronomical data: a series of Jupyter notebooks tutorials
  • Table of contents
  • How to use the tutorials
    • On your machine
    • In github codespaces
    • As a book
  • Flight plan
    • 1. Intro to CDS services in notebooks
    • 2. Arp peculiar galaxies catalog __ First steps with MOCs
    • 3. Abel1656, The Coma Cluster of Galaxies __ The Simple Spectral Access Protocol
    • 4. High Energy sources __ advanced use of CDS services
    • 5. Brown Dwarf search __ cross-matching catalogs
    • 6. Advanced usage of MOC to explore complex regions of interest
    • 7. Multi Messenger Astronomy __ Generation of an observation plan with MOCs
  • Additional tutorials used in past conferences and schools
  • Need help?
  • Glossary
    • IVOA Standards
    • CDS Services
  • Contributions

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How to use the tutorials

On your machine

You can download the notebooks to your personal machine and use them there.

Note the currently supported python versions and the list of dependencies in the file requirements.txt.

This can be done with the following commands:

  git clone https://github.com/cds-astro/tutorials.git
  cd tutorials
  pip install -r requirements.txt
  jupyter lab

In github codespaces

• In Github, you can open a JupyterLab instance. To do so, go in your Settings, then Codespaces and in Editor Preference choose Jupyter Lab. And voilà, you can now launch the tutorials, execute and modify them without any installation!

As a book

• You can also explore the notebooks in a website here

Flight plan

The tutorials come in a recommended order ranging from basic usage of the CDS tools to more advanced examples.

1. Intro to CDS services in notebooks

We show how to call Simbad, Aladin Lite, Vizier and X-match in a Jupyter Notebook.

2. Arp peculiar galaxies catalog __ First steps with MOCs

We explore Arp's Catalog of peculiar Galaxies and extract the galaxies explored both in the SDSS and GALEX surveys by using MOCs. This tutorial highlights two python modules for querying data : astroquery and pyvo.

3. Abel1656, The Coma Cluster of Galaxies __ The Simple Spectral Access Protocol

This tutorial focuses on the Coma Cluster of Galaxies. In particular, we search for redshift information of galaxies in the spatial vicinity of the cluster centre. To get this information we get catalogues with measured redshifts and a spectrum, from which we measure a redshift. It uses the Simple Spectral Access (SSA) protocol of the virtual observatory.

4. High Energy sources __ advanced use of CDS services

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