Time | Item | Who | Notes |
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5min | Simulated Data | Name | - Deadline is May 31st
- Need Level1b data
- "Small" data sets in all TSO modes (simple, noise free)
- "Medium" data set containing simulated transit with realistic uncertainties
- "Large" data set for memory management and archival distribution purposes
- Need matching APT files
- See below for PDF of required header keywords
- Place files on central storage
- Everett presented update on NIRCam simulated data (see slides below)
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| Bright Target Acquisition (TA) | | - NIRCam TA uses medium filter (F335M) and NGROUPS=3
- Saturation limit is K=7.02
- 4 GTO targets exceed this limit (HD 189733, HD 209458, HD 149026, GJ 436)
- Implementation of a narrow filter for TA improves limit by ~2.5 mag, but won't likely be possible until Cycle 2
- Option A: TA on offset target
- Positive: Requires no additional capabilities
- Negative: Limited to < 30" separation, requires both positions be know very precisely, faintness limits
- Option B: TA on saturated target
- Positive: No offset uncertainty, better pointing consistency, doesn't require nearby offset star
- Negative: May require changes to flag saturated pixels
- John Stansberry to test how far into saturation we can reasonably go
- Faint offset targets aren't an issue
- Option C: Add TA through a narrow-band filter to APT and OSS
- Positive: Improves saturation limit to ~K=5.5
- Negatives:
- Requires changes to APT, PPSDB, OPGS, OSS
- May require separate 'apertures' to be defined for TA in the 2 filters (calibration issue).
- Option D: Allow TA using NGROUPS=1, 2
- Positive: Improves saturation limit by ~1.2 mag
- Negative: Requires bigger changes to OSS than Option C, and APT changes (at least).
System | Offset Distance (") | Offset Jmag |
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HD 189733 | 11.5 | 10.1 | HD 209458 | 32.9 | 15.7 | HD 149026 | 20.4 | 13.9 | GJ 436 | 26.4 | 16.4 |
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| Proposal Instructions for JWST |
| - Waiver for exposure limit on MIRI TSO imaging
- Implement new Special Requirement "Time Series Observation" for some JWST templates
- Sarah Kendrew working on table of TSO modes (mandatory, optional, not available), may include in JDox
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| JWST Documentation |
| - Many JDox pages are going live tomorrow (May 19th)
- Instrument team members should review relevant pages and supply feedback if changes are needed
- Still working on TSO landing page that provides a broad overview and directs users to additional pages for more detailed information
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| Best NIRISS Observing Practices | Loic | - Loic recommends using F277 filter to measure position of first order trace (without second order overlap)
- Filter/grism combination not currently supported in APT for science observations
- Loïc Albert to look into prioritizing this change with respect to other tasks
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