JWST ETC Calculations Page Overview
The JWST Exposure Time Calculator initializes a calculation once the user chooses an instrument and mode. Multiple calculations can be compared, copied, and modified in the ETC workbook.
Video Tutorial: ETC General Overview
The Calculations page in the JWST ETC is where a user specifies an instrument and mode, the background, instrument and detector configuration, and observing setup and extraction strategy for a given calculation. This is typically done after scene(s) and source(s) of interest have been defined on the Scene and Sources page, although a default scene containing a central point source is always available. The Calculations page offers users the ability to do a comparative analysis of multiple sources or locations in the scene to determine which calculation offers the best signal-to-noise ratio (SNR).
List of articles
- JWST ETC Creating a New Calculation: Instructions for setting up, editing, and running calculations in the ETC.
- JWST ETC Backgrounds: Description of the available background options including example positions, dated backgrounds, and percentile options.
- JWST ETC Wavelength of Interest/Slice: Explanation of the Wavelength of Interest/Wavelength of Slice option and how to make best use of it in ETC calculations.
- JWST ETC Batch Expansions: Details on the various batch expansion options that can be used for quick exploration of SNR for different filters and detector parameters.
- JWST ETC Strategies: Landing page with links to individual articles on all of the available extraction strategies in the ETC.
- JWST ETC Target Acquisition: Landing page with links to individual articles detailing target acquisition (TA) calculations with all 4 science instruments.