Pandeia: A multi-mission exposure time calculator for JWST and WFIRST

Klaus M. Pontoppidan, Timothy E. Pickering, Victoria G. Laidler, Karoline Gilbert, Christopher D. Sontag, Christine Slocum, Mark J. Sienkiewicz, Christopher Hanley, Nicholas M. Earl, Laurent Pueyo, Swara Ravindranath, Diane M. Karakla, Massimo Robberto, Alberto Noriega-Crespo, Elizabeth A. Barker

Research output: Chapter in Book/Report/Conference proceedingConference contribution

41 Scopus citations


Pandeia is the exposure time calculator (ETC) system developed for the James Webb Space Telescope (JWST) that will be used for creating JWST proposals. It includes a simulation-hybrid Python engine that calculates the two-dimensional pixel-by-pixel signal and noise properties of the JWST instruments. This allows for appropriate handling of realistic point spread functions, MULTIACCUM detector readouts, correlated detector readnoise, and multiple photometric and spectral extraction strategies. Pandeia includes support for all the JWST observing modes, including imaging, slitted/slitless spectroscopy, integral field spectroscopy, and coronagraphy. Its highly modular, data-driven design makes it easily adaptable to other observatories. An implementation for use with WFIRST is also available.

Original languageEnglish (US)
Title of host publicationObservatory Operations
Subtitle of host publicationStrategies, Processes, and Systems VI
EditorsAlison B. Peck, Robert L. Seaman, Chris R. Benn
ISBN (Electronic)9781510601994
StatePublished - 2016
Externally publishedYes
EventObservatory Operations: Strategies, Processes, and Systems VI - Edinburgh, United Kingdom
Duration: Jun 27 2016Jul 1 2016

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


OtherObservatory Operations: Strategies, Processes, and Systems VI
Country/TerritoryUnited Kingdom


  • JWST
  • exposure time calculator
  • observation planning

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


Dive into the research topics of 'Pandeia: A multi-mission exposure time calculator for JWST and WFIRST'. Together they form a unique fingerprint.

Cite this