HEALPix History

HEALPix was originally devised in early 1997 by Krzysztof M. Górski at the (now defunct) Theoretical Astrophysics Center (TAC) in Copenhagen, Denmark (he is currently at Jet Propulsion Laboratory, JPL).
Early development of the HEALPix concept and initial implementation was made in the spring of 1997 in collaborative work of K.M. Górski with Eric Hivon (currently at the Institut d'Astrophysique de Paris, IAP, France).
Benjamin D. Wandelt, then at the TAC (now at IAP), has contributed critically to the further development of HEALPix and related mathematical methods.
Frode K. Hansen, then at the TAC (now at Universitetet i Oslo, UIO), Anthony J. Banday (then at Max Planck Institut für Astrophysik (MPA), Garching, Germany, now at Centre d'Etude Spatiale du Rayonnement, Toulouse, France) and Matthias Bartelmann (then at MPA, now at Institut für Theoretische Astrophysik, Heidelberg, Germany) provided invaluable input required to make possible the first large release of the HEALPix software (Version 1.10).

The following releases of the HEALPix software (Versions 1.20 to 3.30) and the current one (Version 3.31) benefited from:

HEALPix Team

The active support of HEALPix currently involves the following people (in alphabetical order):

  • A.J. Banday;
  • K.M. Górski;
  • E. Hivon: IDL and F90 developments, release coordination, web site;
  • E. Joliet: Java developments;
  • W. O'Mullane: Java developments;
  • M. Reinecke: C, C++ and Java developments;
  • L. Singer: Python developments;
  • A. Zonca: Python developments.

This effort is not supported by any dedicated funds, and depends entirely on the voluntary collaboration of the mentioned individuals.


We thank the following people for their contributions and/or suggestions, which significantly helped us to improve HEALPix throughout its several releases

  • Reza Ansari
  • John Arballo
  • Marc Ashdown
  • Carlo Baccigalupi
  • Karim Benabed
  • Aurélien Benoit-Lévy
  • Jean-Philippe Bernard
  • Snorre Boasson
  • Caroline Bot
  • Michela Botti
  • Anthony Challinor
  • Stéphane Colombi
  • Alain Coulais
  • Giancarlo de Gasperis
  • Clive Dickinson
  • Hervé Dole
  • Olivier Doré
  • Gilles Duvert
  • Franz Elsner
  • Hans Kristian Eriksen
  • Pablo Fosalba
  • Silvia Galli
  • Ken Ganga
  • Tuhin Ghosh
  • Giovanna Giardino
  • Jean-Christophe Hamilton
  • Andrew Jaffe
  • Tess Jaffe
  • Reijo Keskitalo
  • Alex Kim
  • Ted Kisner
  • Masakazu A.R. Kobayashi
  • Eiichiro Komatsu
  • Wayne Landsman
  • Guy Le Meur
  • Samuel Leach
  • Antony Lewis
  • Davide Maino
  • Jean-Baptiste Marquette
  • Marc-Antoine Miville-Deschenes
  • Serge Monkewitz
  • Jiří Nádvorník
  • Paolo Natoli
  • Fabio Noviello
  • Chris North
  • Clive Page
  • Tim Pearson
  • William Pence
  • Nicolas Ponthieu
  • Torsti Poutanen
  • Simon Prunet
  • Benoit Revenu
  • Christophe Ringeval
  • Cyrille Rosset
  • Rosa Ruiloba
  • David N. Spergel
  • Radek Stompor
  • Giovanna Tinetti
  • Maurizio Tomasi
  • Wen Zhao

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