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 |
|---|---|---|---|
| 2024-10-31 | jwst_1299.pmap | latest | Affected data - NIRISS, imaging modes, photom reference file. Delivering a new pmap with NIRISS imap updates, which changes the photom rmap entry to the most recently delivered one, created in jwst_1982.pmap. This will activate this new NIRISS photom file, which encompasses changes to the photometric calibration that has been revised based upon analysis of the cycle 1 and commissioning photometric observations. There have been changes in the resulting mean scaling factors because of the charge migration step in the pipeline and because of having more observations from a number of photometric standards. The standard star used in commissioning, LDS 748B, is found to be an outlier in the scaling values for the longer wavelength NIRISS filters compared to all the other stars that were observed. |
| 2024-10-15 | jwst_1298.pmap | archived | Affected data - NIRSpec, FS and MOS modes, pars-outlierdetectionstep reference files. This delivery provides new NIRSpec FS and MOS parameter reference files for the outlier detection step to set improved default outlier detection parameters. The improved parameters are needed to avoid clipping source signal in high signal to noise point source targets with the improved spectral resampling in JWST software version 1.16.0. The NIRSpec Team recommends users to reprocess the affected MOS/FS data to see the improvements reflected in their final data products. New system_calver file for jwst software version 1.16.0, which corresponds to DMS Build 11.1 was also delivered. This file contains the new pinned context for Build 11.1, jwst_1298.pmap, to be used for processing and reprocessing of all JWST data upon installation of jwst version 1.16.0 into operations. |
| 2024-09-26 | jwst_1293.pmap | archived | Affected data. MIRI, LRS SLITLESSPRISM modes, specwcs reference file. A new MIRI specwcs rmap is being delivered with updates to specwcs file 0009, because this file was previously delivered with an incorrect keyword. The subarray keyword was set to FULL, rather than SLITLESSPRISM, which means that the data was not using the correct wavelength file, resulting in incorrect results. File 0006 was meant to be replaced by 0009 at the previous delivery, so 0006 has also been deleted from the rmap. With the correct subarray selection criteria in place for file 0009, all SLITLESSPRISM data can be reprocessed with Build 11.0 software. |
| 2024-09-23 | jwst_1290.pmap | bad | Affected data - NIRISS, SOSS modes, pastasoss reference file. NIRSpec, MOS, FS, and BOTS observing modes, fflat reference files. The initial NIRISS SOSS mode pastasoss reference file was delivered, which will improve the optimal spectral extraction algorithm for SOSS data by accounting for the trace tilt as a function of the NIRISS pupil wheel position. The old algorithm unreliably performs a fit for the trace position but this new reference file uses calibrated on-sky data to accurately predict the trace location. The NIRSpec MOS, FS, and BOTS FFlat reference files have been updated to accompany improvements to the JWST pipeline spectral resampling for NIRSpec data in JWST pipeline versions 1.16.x and above. The pipeline changes require updated flux calibrations that are provided by these FFlat reference files. Any NIRSpec MOS, FS, and BOTS data processed with JWST pipeline versions 1.16.0 and above should use these new reference files. Using previous FFlat reference files with pipeline versions 1.16.0 and newer will produce flux calibrations that are systematically low by up to 5 percent. New system_calver file for jwst software version 1.16.0, which corresponds to DMS Build 11.1. |