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 |
|---|---|---|---|
| 2024-12-20 | jwst_1321.pmap | latest | Affected data - NIRCam, all modes, sirskernel reference file. This is the initial reference file of fourier coefficients for the SIRS method of reference pixel correction in NIRCam. Testing has found this new reference pixel correction method can give better results compared to the current standard reference pixel correction method. As the reference pixel correction step is performed on all NIRCam exposures where reference pixels are present, this update potentially affects all full frame and some subarray exposures for all modes. Delivering the first NIRCam sirskernel rmap to initialize this new reference type and prepare for subsequent sirskernel reference file deliveries. New system_calver file for jwst software version 1.17.0, which corresponds to DMS Build 11.2. This file contains the new pinned context for Build 11.2, jwst_1321.pmap, to be used for processing and reprocessing of all JWST data upon installation of jwst version 1.17.0 into operations. |
| 2024-12-20 | jwst_1318.pmap | archived | Affected data - MIRI, future LRS modes, psf reference file. We present a super-sampled empirical point spread function, ePSF, for the LRS slit, based on observations of a standard star from Commissioning and in Cycles 1 and 3. The reference file included a PSF for each row of the detector exposed to LRS slit data, rectified, normalized, and super-sampled. The CENTCOL and SUBPIX keywords in the FITS header give the central column of all PSFs and the number of subpixels per actual detector pixel. A second extension provides a wavelength map for the PSF image. The observations were obtained by scanning the standard star in 11 steps of 0.1 pixels each, 11 mas, across the two nod positions and the center of the slit. These data were reduced with pipeline version 1.16 and CRDS context jwst_1298.pmap with a customized saturation reference file set to half the nominal value to minimize the brighter-fatter effect, at wavelengths below 6.2 um. The nine scans, with three positions and three cycles, were combined to produce one PSF image. This reference file is not presently used by the pipeline but may be in the future. Delivering the first MIRI psf rmap to initialize this new reference type and prepare for subsequent psf reference file deliveries. |
| 2024-12-20 | jwst_1316.pmap | archived | Delivering a new pmap with updates to the imaps for all instruments to include entries for pars-badpixselfcalstep and pars-cleanflickernoisestep. These entries correspond to two new steps that have recently been added to the JWST calibration pipeline - badpix_selfcal and clean_flicker_noise. There are currently no reference files associated with these steps, so we set these entries to N/A in the imaps to avoid CRDS errors when fetches are made. Also updated the imaps for all instruments to include entries for PSF and SIRSKERNEL, to prepare for the delivery of new MIRI psf and NIRCam sirskernel reference files. All entries for these reference types will point to N/A, but the MIRI and NIRCam imaps will populate with the initial reference mapping when the initial rmaps are delivered. |
| 2024-12-20 | jwst_1315.pmap | archived | The NIRCam dark rmap is being updated to add missing entries for subarrays SUB32TATS and SUB32TATSGRISM. These will be set to N/A, such that dark current subtraction is skipped for these apertures. For more details, see JWSTDMSDR-5874. |