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 |
|---|---|---|---|
| 2026-03-13 | jwst_1487.pmap | latest | Affected data - MIRI WFSS mode, background file. This file was created from approximately 300 archival spectroscopic images obtained with the P750L prism. The spectral traces for sources with an SNR greater than 50 in the direct image were removed, and the resulting spectral images were normalized and median stacked. The file represents the MIR instrumental background, which the pipeline scales to the in-scene background, enabling both instrumental and cosmic background removal. The file represents a first attempt at background removal, and users are encouraged to carefully review their results. |
| 2026-03-12 | jwst_1486.pmap | archived | Affected data - NIRCam, all modes, superbias reference files. These new superbias reference files cover all detectors and subarrays. The updated files were created from cycle 2, 3, and 4 data, with the exact date range depending on the subarray and the schedule of past dark current observations. The superbias data contained within these files were created using the 0th frames of dark current integrations. No reference pixel correction or other pipeline steps were applied to the input data. |
| 2026-03-09 | jwst_1485.pmap | archived | Data affected: NIRCam imaging, WFSS, and coronagraphy data. Time series data are NOT affected. Reference file type - calwebb_detector1 parameter reference file. This updated calwebb_detector1 parameter reference file turns on single-group ramp-fitting for imaging, WFSS, and coronagraphic data. Pixels which have a single group with good signal prior to saturating will have a signal rate value calculated by dividing the good signal value by the appropriate exposure time. Prior to this update, pixels containing a single group with a good signal were set to NaN. |
| 2026-03-05 | jwst_1484.pmap | archived | Affected data - NIRISS, WFSS modes, photom reference file. A new NIRISS photom file is being delivered to change the units of the WFSS photometric calibration to be per inverse wavelength. This accommodates a change in the pipeline photom step to measure the dispersion for each order/two-dimensional cutout and divide the photometric conversion values by the dispersion to get the flux density values. This new photom file can only be utilized with the development version of the jwst pipeline, 1.21.0.dev, at this time, and will result in errors if used with jwst versions 1.20.2 or earlier. Delivering new MIRI apcorr and extract1d rmaps that now have a catch-all entry with all selection criteria set to N/A, that points to N/A. This will prevent CRDS log errors in reference file selection for these types, including having observations with exposure type MIR_WFSS point to N/A for these references. |