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 |
|---|---|---|---|
| 2025-05-19 | jwst_1369.pmap | latest | Affected data : NIRSpec BOTS, MOS, IFU and FS data obtained in FULL frame traditional readout modes. In this delivery the NIRSpec Team provides an initial SIRSkernel reference file containing Fourier coefficients for the Simple Improved Reference Subtraction method of reference pixel correction for NIRSpec data. Use of the SIRS reference pixel correction method can provide improved results over standard reference pixel corrections in particular a slightly reduced 1 over f noise. This correction method only applies to FULL frame, traditional readout modes. As of this delivery, the SIRS method is not used by the JWST pipeline by default for NIRSpec data, but may be the default in the future. |
| 2025-05-16 | jwst_1368.pmap | archived | Affected data - NIRCam, LW data in all modes, sirskernel. This updated sirskernel reference file contains SIRS kernels for all NIRCam detectors. The previous sirskernel file contained kernels only for the SW detectors. With this new reference file, the LW detectors can also use the SIRS method. The SIRS reference pixel correction algorithm is turned off by default in the pipeline. For those running the pipeline manually who turn on the SIRS method, this new reference file will result in improved reference pixel correction results for the ALONG and BLONG detectors. |
| 2025-05-15 | jwst_1367.pmap | archived | Delivering a new NIRCam dark rmap that includes the subarray value SUB32TA_DHS in the entry that points to N/A, so that dark subtraction is skipped for these types of exposures. This fix resolves an error encountered in NIRCam DHS testing. |
| 2025-05-14 | jwst_1366.pmap | archived | Affected data: MIRI, LRS SLIT, psf reference file. The Empirical Point Spread Function for MIRI LRS slit observations reference file is being updated. The file is required for optimal extraction for LRS observations, but not currently used by the default calibration pipeline so no data will need to be reprocessed for the archive. This PSF differs from the previous version as follows. -Additional removal of warm and cool pixels. -Changed method used to estimate offsets between commanded and measured subpixel offsets -changed oversampling from 50 to 20 -changed the order of combining sub-pixel dithered exposures and interpolating on an even pixel grid -changed method to rectify, align, and average PSFs from 3 cycles x 3 nods per cycle Even with those changes the LRS slit ePSF has structure at the level of about 10 percent at wavelengths beyond 11 micron so users should interpret any results at longer wavelengths requiring higher precision with care. |