||Affected data- NIRSpec, NRS_IFU modes, cupebar reference file. MIRI, LRS fixed slit and slitless modes, extract1d reference file.
These NIRSpec reference files have been updated to include new extensions with the default wavelength ranges used by the cubebuild algorithm with the DRIZZLE method. This update will make it easier to compare NIRSpec data cubes to one another as well as with data cubes from other instruments. Affected data are NIRSpec, NRSIFU, IFU Cube defaults.
This MIRI LRS extract1d file is being delivered in order to define default apertures for spectral extraction for the MIRI LRS in Spec3 for both fixed slit and slitless modes. This reference file will work around the issue of improper spectral extraction apertures based on WCS information.
This update to the default extraction aperture is meant to improve the spectra delivered at the Spec3 stage of the pipeline. However, it actually will produce worse results for spectra extracted in the Spec2 stage. Users should focus on the Spec3 output. Better extractions from the Spec2 products can be obtained by rerunning the extract_1d step offline using a custom extract1d reference file modified to specify the desired extraction limits within the image.
||Affected data - NIRCam, future coronagraphic and LW imaging modes, dark and flat reference files. MIRI, MRS modes, distortion, specwcs, regions, and wavelengthrange reference files. NIRSpec, subarray-FULL modes, dark and mask reference files.
These NIRCam dark current reference files comprise an initial set of references to cover the newly-defined coronagraphic apertures that support longwave and shortwave coronographic observations. These include the SUB320A335R, SUB320A430R, and SUB400X256ALWB apertures in the SW channel, as well as the SUB400X256ALWB, SUB640A210R, and SUB640ASWB in the LW channel. No data yet exist for these apertures. All pixels in these reference files are set to zero. New NIRCam longwave imaging flats were also delivered to provide the first inflight flat field correction at the pixel and filter-level to all NIRCam LW imaging data.
This delivery updates the MIRI MRS DISTORTION, SPECWCS, REGIONS, and WAVELENGTHRANGE reference files for all 12 MRS bands. These files are now updated to the FLT-5 wavelength and spatial distortion solution and are recommended for all scientific users. In the spatial dimension, this FLT-5 update incorporates some minor rotational adjustments to the mapping between the IFU alpha-beta plane and the spacecraft V-frame, in addition to boresight updates between the twelve individual MRS bands.
New NIRSpec full frame traditional readout and IRS2 readout darks and masks were delivered to the CRDS pipeline for use with all data taken since January 1, 2022. The new darks have the same sci extension as the previous delivery but new DQ extensions. In the darks, pixels with an RC or Bad Reference Pixel flag are also flagged as Do Not Use, while Unreliable Slope, Bad Fit and Telegraph pixels are still considered good for further processing. Hot Pixel flagging has been moved to the mask reference file and is also considered Do Not Use.
See Context History - All Contexts on JWST OPS CRDS for full details of each delivery.
||Affected data - Future NIRCam coronagraphic observations
These NIRCam superbias reference files comprise an initial set of references to cover the newly-defined coronagraphic apertures that support simultaneous longwave and shortwave corongraphic observations. These include the SUB320A335R, SUB320A430R, and SUB400X256ALWB apertures in the SW channel, as well as the SUB400X256ALWB, SUB640A210R, and SUB640ASWB in the LW channel. No data yet exist for these apertures. Therefore the data in these reference files were calculated using the bias values in similar, neighboring apertures on the same detectors.