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  1. ETC 3.2 Includes New Capabilities and Bug Fixes

    April 5, 2024

    Version 3.2 of the JWST Exposure Time Calculator (ETC) features the addition of square extraction apertures for imaging modes and updates to the handling of NIRSpec reference files.

    Line drawing of JWST on top of a background of a composite image of the Cartwheel Galaxy observed by JWST


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For technical assistance, please contact the JWST Help Desk.


The NASA James Webb Space Telescope, developed in partnership with ESA and CSA, is operated by AURA’s Space Telescope Science Institute.