This is the CRDS Context currently in use by the pipeline calibration software.
Each cal version is associated - and guaranteed to work with - a specific build context. For JWST users, the default context is determined based on the version of JWST software you have installed, unless you explicitly override this by setting the "CRDS_CONTEXT" environment variable to a specific context or virtual context, e.g. "jwst-latest".| Start Date | Context | Status | Description |
|---|---|---|---|
| 2025-06-26 | jwst_1386.pmap | latest | Affected data: MIRI, MRS, bad pixel reference files. This delivery is of new MIRI MRS bad pixel reference files for Spring 2025. We changed to 3 month cadence of updates in 2025. Any MRS data taken after May 5, 2025 should be reprocessed to use these new masks. Shallow observations, defined as FASTR1 data with NGROUPS less than 50, use the least aggressive bad and warm pixel masking, medium-depth observations, defined as FASTR1 data with NGROUPS greater than or equal to 50, use a slightly more aggressive flagging, and deep observations, defined as all SLOWR1 data, use the most aggressive flagging thresholds. This hybrid scheme is designed to help flag known bad pixels at the level actually required by different science cases. Each of the new bad pixel masks is based upon a thresholding analysis of multiple deep MRS background sky observations. |
| 2025-06-20 | jwst_1385.pmap | archived | Affected Data: NIRSpec, all MOS observing modes, new MOS pathloss reference file. This is the first data-based MOS pathloss reference file, while the current version in CRDS is still a model version. NIRISS, all modes, mask, superbias and dark reference files. This delivery includes reference files covering 9 epochs from the end of commissioning through most of cycle 3. NIRSpec, MOS data using GRATING PRISM G395H G395M G235H G235M and G140H or G140M with F100LP, s-flat reference files. This delivery updates the NIRSpec MOS S-flats for all grating filter combinations except G140M F070LP and G140H F070LP to include a correction for field-dependent variations in the flux calibration. NIRISS, AMI mode data, pars-chargemigrationstep reference files. These files contain updated charge migration signal threshold values for four AMI filters, F480M, F430M, F380M, F277W. NIRSpec, BOTS, MOS, IFU and FS data in FULL frame readout, new version of 14 superbiases and 14 darks with an updated format of the PGRATIN header keyword to match expected datamodel specifications. For more details regarding individual deliveries, please see the Context History section and select all contexts on the CRDS homepage. |
| 2025-06-11 | jwst_1379.pmap | archived | Affected data: NIRCam, full frame data for all modes, readnoise and superbias reference files. These new NIRCam readnoise reference files were created from full frame darks collected in cycles 2 and 3. They cover the time period from the beginning of 2024 until the present. On average, readnoise values in these files are several percent lower than they were in the previous reference files. These new NIRCam superbias reference files were created from full frame darks collected in cycles 2 and 3. They cover the time period from the beginning of 2024 until the present. These new superbias images were created from the sigma-clipped stack of 0th frames from the input integrations. These files differ from the previous superbias reference files in that no calibration pipeline steps were run on the input files. Previous superbias files were created from reference pixel subtracted data. This updated method simplifies the construction of the superbias files while keeping the signal subtracted by the combination of the superbias and reference pixel subtraction steps the same, modulo any real changes in bias level. |
| 2025-06-10 | jwst_1377.pmap | archived | Affected data: MIRI, LRS slit data, apcorr and photom reference files. This delivery is of updated apcorr and photom files for MIRI LRS slit reference files. We used the most recent LRS slit ePSF to produce a new aperture correction for reference file. The aperture correction for slitless data remains identical to that in the previous reference files. The new PSF is better suited for optimal extraction of faint sources because it mitigates a few percent of the brighter fatter effect, and it has a few percent narrower width due to a new method of interpolation. The aperture correction file was used to compute the photom reference file. The results from testing the photom reference file are consistent with the performance of the last photom update in August 2024 within the derived uncertainties. There is no need to reprocess any data with these new reference files. |