NASA's James Webb Space Telescope

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JWST Community Lecture Series - JWST Exposure Time Calculator Tool Demonstration (S. Ravindranath)

Community Lecture
February 21, 2017 11:00 AM EST - February 21, 2017  12:00 PM EST
Baltimore STScI Muller N420

The JWST Exposure Time Calculator is an advanced pixel-based ETC which enables the user to model various aspects of the data acquisition and post-processing, and is paired with an interactive graphical user interface that facilitates exploration of parameter space. The JWST ETC supports all the JWST instrument observing modes: imaging, spectroscopy (slitted, slitless, and IFU), coronagraphy, and aperture masking interferometry. The graphical user interface has enhanced capabilities and supports multiple workflows, along with the functionality to share the work efficiently with collaborators. Users can create workbooks in which a set of related calculations can be organized, and the workbooks are persistent and reusable. The ETC can be used to create complex astronomical scenes with multiple sources, that can be used in multiple calculations with different instrument and detector setups. The batch expansion feature enables users to explore the ETC results for a range of input values of selected parameters.  The results from multiple calculations can be compared using the interactive 1-D plots. The output images and data tables are available as downloads for further independent analysis. I will demonstrate the key features of the JWST ETC tool with example calculations that highlight how they can be used efficiently to plan the JWST observations.