JWST Observer News

Banner image showing various science themes within JWST mirror segments

JWST Observer News includes the latest updates on proposing, the calibration pipeline, and software targeted to the astronomical community. Stay informed by subscribing at the bottom of the page.

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Pipeline News: Build 12.1 of the Science Calibration Pipeline Is Now Available

November 21, 2025

Build 12.1 includes improvements to all four JWST instruments.
New Pathloss Corrections for NIRSpec Multi-Object and Fixed Slit Spectroscopy Are Available

November 11, 2025

The latest reference files deliver significant improvements on the point and uniform source flux calibrations.
NIRSpec Observation Visualization Tool (NOVT) Version 2.3.0 Released

January 12, 2018

NOVT, a tool created to assist in planning NIRCam pre-imaging for NIRSpec, has been updated to include a new NIRCam dither pattern.
NIRSpec Successfully Completes Cryo-Vacuum Testing

April 5, 2016

NIRSpec and all of JWST’s scientific instruments recently completed “CV3,” the third cryo-vac test of JWST’s Integrated Science Instrument Module (ISIM).