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
TL;DR
Pandeia is a versatile, modular exposure time calculator designed for JWST and WFIRST, enabling detailed simulations of observations across multiple modes to assist proposal planning.
Contribution
It introduces a comprehensive, simulation-hybrid Python engine capable of modeling various JWST observing modes with realistic instrument effects.
Findings
Supports all JWST observing modes including imaging and spectroscopy
Handles realistic instrument effects like PSF and detector noise
Provides adaptable design for other observatories
Abstract
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.
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