Time | Item | Who | Notes |
---|
| New group email list |
| - JWST-TSOWG@maillist.stsc.iedu
|
5min | Detector Settling Times | Tom G. | - Tom: "I think it would be useful to compare info and to eventually give informed
advice to observers about how much time the different instruments need to settle to XX ppm at the start of a TSO exposure." - May not have sufficient info before commissioning
- Ramps in NIR instruments are short and are sometimes due to source variations
- MIRI group at JPL is continuing to test source of ramps (see discussion below)
|
| Persistence Mitigation | Kevin | - HST/WFC3 persistence mitigation using internal Tungsten lamp
- Can this be applied to NIR instruments with JWST? Could turn on lamp and cycle detector while we wait for the science to start.
- NIRCam doesn't have an internal lamp
- NIRISS has a tunable flatfield lamp that shows some structure and hasn't been tested with grism (may not be necessary)
- MIRI has lamp with non-uniform coverage, could also anneal, fill wells with bright background using long-wavelength filter
- Dan: MIRI tests show negative slope (similar to blue circles in above figure), may be due to change in read time/pattern
- Kevin Stevenson : to contact Dan offline to learn more
- Maria Pena-Guerrero : Does NIRSpec have internal calibration lamp?
- Agreed to create a space on Outerspace to share/discuss persistence results
|
| TSO Pipeline Status | Kevin | - CALWEBB_DETECTOR1
- Data quality, saturation check, error initialization, NIR/MIR corrections, slope fitting
- Baseline: Complete
- Optimal: Build 7.2+
- CALWEBB_SPEC2
- WCS info, subwindow extraction, flat field correction, flux calibration, rectified 2D product
- Baseline: Complete
- Optimal: Build 7.2+
- CALWEBB_TSO3
- Baseline (Outlier rejection, no BG subtraction, summation spectral extraction)
- Build 7.2 (to be delivered Oct 5, 2018)
- Optimal (Outlier rejection, col-by-col BG subtraction, optimal spectral extraction)
- ExoCTK
- Observation planning (G&I, target overlap, PandExo)
- Light curve fitting (in-house module using BATMAN, MC-Cubed, EMCEE, Dynesty)
- Retrievals (e.g. CHIMERA, PLATON)
- Version 0.2 will be released in October
|
| TSO Pipeline Paper |
| - We should write a paper describing the algorithms used in JWST TSO pipeline
- Timeline
- Initial version ready for ERS Simulated Data workshop in Summer 2020, could mostly describe the pipeline itself
- Follow-up version after commissioning/ERS data, could describe optimal procedures/parameter values
- Priority
- Lead
- Be sure to invite calibration pipeline group to participate
|
| Observers Roadmap for JDox | Sarah | |
| Precise Timing with FPE | John S. | - IEC = ISIM Electronics Components
- Comparing measured IEC panel temperature during heater cycling tests to measured temperature in FPE
- Both temperature sensors record similar (~30 K) swing in temperature
- IEC exhibits a deadzone of ~2 K
- FPE has a corresponding deadzone of ~0.2 K
- Need to see if any of the instruments were performing calibration programs during this time that could be used to assess flux stability
- Stansberry to email WG with dates
|
| JWST QuickLook | Kevin | What to include in TSO monitor:- Spectroscopic flux
- Time in BJD_TDB
- PSF drift and shape
- Instrument (FPE?) temperatures
- Precision relative to photon limit
- Max target fluence
- More???
|
| MIRI JPL Test Update | Dan D. | - Previous tests used a blackbody light source, more recent tests use LED
- Previous results showed large ramp, attributed to BB source
- Currently conducting tests with LED
- Goals:
- Characterize and mitigate ramp
- Provide recommendation on fluence
- Will report back at Nov or Dec meeting with new results
|