JWST JDox Latest Updates
Lists of recently updated articles in the JWST User Documentation (JDox) website are provided in this page.
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New JDox articles since
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Notable updates to JDox articles since
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| Article | Updated on | Update description |
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| Observatory → Observatory Hardware | ||
| JWST Wavefront Sensing and Control |
| Updated Figure 2, trending of the wavefront error in the science era |
| Observatory → Observatory Characteristics | ||
| JWST Position Angles, Ranges, and Offsets |
| Updated PA for MIRI using the value in pysiaf |
| JWST Guide Stars |
| Updated guide star acquisition success rate value |
| Instruments → MIRI | ||
| MIRI MRS APT Template |
| Updated to add description of the MRS background dither and Imager pointing. |
| MIRI Bright Source Limits |
| Updated for Cycle 3 based on in-flight measurements and ETC 3.0 |
| MIRI Sensitivity |
| Sensitivity plot updated based on ETC 3.0 |
| MIRI MRS Recommended Strategies |
| Dedicated background recommendations updated for Cycle 3 |
| MIRI MRS Simultaneous Imaging |
| Updated to include new image-optimized dither option available in Cycle 3 |
| MIRI MRS PSF and Dithering |
| Updated for Cycle 3 with description of background dither pattern |
| MIRI Medium Resolution Spectroscopy |
| Updated resolving power with additional in-flight measurements and added information on working with MRS data products |
| Instruments → NIRCam | ||
| NIRCam Absolute Flux Calibration and Zeropoints |
| Updated to describe the latest delivery to CRDS (pmap 1126) |
| NIRCam Coronagraphic Occulting Masks and Lyot Stops |
| Added text relevant to new dual-channel imaging mode |
| NIRCam Coronagraphic Target Acquisition |
| Streamlined and revised text to reflect dual-channel mode starting in Cycle 2. Added Table 1 summarizing coronagraphic TA specs. Simplified Figure 1 to emphasize SAM offsets. |
| NIRCam Coronagraphic Imaging APT Template |
| Clarified information about new dual-channel imaging. Replaced Table 1 with one limited to science subarrays. Expanded instructions for PSF reference observations and special requirements. |
| NIRCam Coronagraphic Imaging |
| Revised annotation for Figure 1. Expanded Table 1 to compare nominal and end-to-end IWAs of bar occulters. New Figure 2 showing default locations of targets along bar occulters in primary channel. New Figure 3 comparing dual-channel subarray FOVs. |
| NIRCam WFSS Backgrounds |
| Figure captions revised to clarify that these are simulated backgrounds meant to show the grism/filter/module dependent variation in the shape of the background in WFSS observations as well as the imprint caused by the coronagraph when using Grism C |
| NIRCam WFSS Field of View |
| Updated to reflect the current status and understanding of the calibration as of this date |
| NIRCam Grism Time Series |
| Updated Figures 2 & 3 with the in-flight throughputs |
| Instruments → NIRISS | ||
| NIRISS Sensitivity |
| Updated to match ETC 3.0 sensitivities. Biggest change is to assume a default extraction aperture of 2.5 pixels for sensitivity calculations. |
| NIRISS Aperture Masking Interferometry |
| Updated dithering section and added discussion about flat field errors |
| NIRISS Bright Limits |
| Updated bright limits to be consistent with ETC v. 3.0. AMI bright limits show greatest change due to signal limit decrease from 30,000 e- to 20,000 e- to mitigate impacts of charge migration. |
| NIRISS SOSS Recommended Strategies |
| Added information gathered during Cycle 1 about NIRISS/SOSS backgrounds |
| NIRISS Single-Object Slitless Spectroscopy APT Template |
| Added documentation about short optional exposure before a F277W exposure |
| NIRISS SOSS Time-Series Observations of WASP-39 |
| Changed target to WASP-39b |
| Step-by-Step ETC Guide for NIRISS SOSS Time-Series Observations of WASP-39 |
| Changed target to WASP-39b. Calculations made with ETC v.3.0. |
| Step-by-Step APT Guide for NIRISS SOSS Time-Series Observations of WASP-39 |
| Updated target to WASP-39b. Change text for phase-constraint to link to ExoCTK. |
| NIRISS AMI Observations of Extrasolar Planets Around a Host Star |
| Figures 1 and 2 target visibility tool plots updated for Cycle 3 |
| Step-by-Step ETC Guide for NIRISS AMI Observations of Extrasolar Planets Around a Host Star |
| Updated with new ETC 3.0 sensitivities |
| Step-by-Step APT Guide for NIRISS AMI Observations of Extrasolar Planets Around a Host Star |
| Updated with new ETC 3.0 sensitivities |
| NIRISS AMI Recommended Strategies |
| Updated to note that APT 2023.5 (release date Aug. 24 '23) has filter-dependent offsets applied between TA in AMIBRIGHT mode and the science target, so removed the suggestions that users could apply their own OFFSET Special Requirement when defining observations. Updated discussion of charge migration. |
| NIRISS AMI Dithers |
| Updated AMI 5-step subpixel dither values for APT 2023.5 and recommendation to use the 5-step sub-pixel dither pattern |
| NIRISS Aperture Masking Interferometry APT Template |
| Updated AMI dithers section |
| NIRISS GR150 Grisms |
| Updated conflicting info about the wavelength dispersion |
| Instruments → NIRSpec | ||
| Added new section to describe limiting shutters to those unaffected by cutoffs. | |
| Added new planning parameter to allow multiple sources in a shutter, in APT 2023.5 | |
| IFU, MOS, and FS limiting sensitivity figures replaced and text edited for ETC changes | |
| FS, MOS, and IFU bright limits figures updated | |
| Added Figure 1 showing contaminants in the MSA Shutter View | |
| Major edits to reflect updates made to the Catalog ingest and filtering options in APT | |
| Added text about use of extended objects. Updated language in 1st warning with more detailed discussion of impact of a single saturated pixel. Added an additional warning discussing very faint targets that might be invisible to the WATA algorithm | |
| Under "Approximate brightness limits for MSATA", added text to better explain why we are still using pre-launch reference star magnitude limits in APT | |
| Added information about APA change requests | |
| Additional updated description of deadlines | |
| Proposal Preparation → JWST General Support | ||
| JWST Instrument Overheads |
| Updated Table 1 with current (early Cycle 2) overheads and footnoted caveats. Added APT version for provided values in text |
| Proposal Preparation → Methods and Roadmaps | ||
| JWST Imaging |
| Updated Figure 3, JWST imaging sensitivity, to use sensitivities from ETC 3.0 |
| JWST Integral Field Spectroscopy |
| Updated for Cycle 3 to add information on undersampling and covariance |
| JWST Wide Field Slitless Spectroscopy |
| Added dispersion for NIRISS and NIRCam in Å/pixel |
| Tutorial on Creating Solar System Targets in APT |
| Added information about issues parsing some minor body names |
| Proposing Tools → Exposure Time Calculator | ||
| JWST ETC Source Spectral Energy Distributions |
| Update includes new stellar spectra categories |
| JWST ETC IFU Strategies |
| Added information about the new IFU Aperture Photometry strategy |
| Proposing Tools → Other Tools | ||
| JWST Moving Target Visibility Tool Help |
| Updated for JWST Moving Target Visibility Tool (MTVT) version 1.0 |
| JWST General Target Visibility Tool Help |
| Updated for JWST General Target Visibility Tool (GTVT) version 1.0 |
| NIRSpec Observation Visualization Tool Help |
| Updated usage and screenshots for reimplemented interface |
Data → Calibration Pipeline Caveats | ||
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| Updated minimum CRDS context for MIRI coronagraphic modes | |
| Updated incoming updates to calibration reference data table | |
| Added note about point vs extended source flux calibration | |
| Updated to reflect latest MRS photometric calibration. | |
| Updated for build 9.3, added information about future pipeline enhancements | |
| Updated to reflect updated to pipeline for spectral extraction and bad pixel replacement | |
Articles updated prior to June 1, 2023
Articles updated between January 28 and May 31, 2023, are listed at JDox Updates 28 Jan - May 31 2023.
Articles updated prior to January 27, 2023 are listed at JDox Updates 12 July - 6 December 2022.