The JWST (STScI) Pipeline, and in particular, the steps used by its TSO-mode are in constant development. In this page, we will keep track of the proposed enhancements to the pipeline by the TSO WG. Status of each of the proposed enhancements can be:
: the step is currently an idea; might or might not have an associated Jira ticket.
: the enhancement has been officially proposed to the CalWebb WG. Discussion ongoing as to whether move it to further study or not.
: step currently under development by the Pipeline Development Team.
: step has been implemented in the JWST pipeline.
Priorities are defined for the TSO WG:
1: Critical — will produce unusable/misleading results for TSOs.
2: High — will produce sub-optimal results for TSOs.
3: Low — will produce slightly offset results for TSOS.
|Proposed enhancement||Brief description||TODOs||Relevant jira ticket (s)||Meeting links where this was discussed||Status||Priority||Update date|
|TSO3 Outlier Detection|
Currently, the JWST pipeline does not properly use TSO information to reject outliers (e.g., jump step or current tso3 outlier rejection — see Jira tickets). Proposed to implement HST/STIS algorithm developed by Nikolay Nikolov on JWST TSO pipeline.
Problems with current TSO3 step:
|CalWebb WG: 2021-05-04 Meeting Notes; 2021-01-05 Meeting Notes.|
TSO WG: 2021-02-24 TSO WG Meeting notes.
|3||December 2, 2021|
|Jump detection using TSO information|
Similar to the above, but do it at the group-level; detect jumps using TSO information. This is an idea proposed by Michael Regan. Pros: you don't rely on the reference files.
|2||December 2, 2021|
|Correct jitter spectral movement prior to photom step||If jitter is an issue during JWST observations, then the photom step will incorrectly apply photometric flux standarization to the wrong wavelengths, introducing time-dependant systematics. TSO WG reps think turning off the photom step would be ideal, but not generic solution. Correcting those jitters prior to the photom step would be a solution.|
CalWebb WG: 2021-06-01 Meeting Notes.
TSO WG: 2021-06-02 TSO WG Meeting notes.
|2||December 2, 2021|
|Spectral tracing||Pipeline needs to perform spectral tracing of TSOs in order to (a) record trace movements (useful as external parameters to decorrelate lightcurves) and (b) extract the same portion of the spectrum at each time.||2||December 15, 2021|
|Photometric Centroiding||Same as spectral tracing, but for photometry.||2|
|Pre-amp reset correction ("reference pixels for subarrays without reference pixels")||1||January 3, 2022|
|Background substraction||2||January 3, 2022|
|Optimal extraction||2||January 3, 2022|
Discussion on this:
|1||December 15, 2021|
|Time-stamp accuracy||1||January 3, 2022|
|Integration-level aperture positions||3||January 3, 2022|