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  • News & Announcements (all).
  • Past and future TSO observations (Nikolov).
  • NIRCam/DHS updates (Espinoza, Nikolov).
  • Possible specifications SUBSTRIPE/SUPERSTRIPE for TSOs (Espinoza, all).
  • Instrument roundtable check-in (all)
  • Closing remarks.


View file

Discussion items

10minNews & AnnouncementsAll

  • Welcome to Aarynn Carter, a new member of the JWST NIRISS and TSO CT teams.
  • Sarah Kendrew mentions plans to make the TA optional for MIRI LRS. In addition, the MIRI team has the MCOR noise suppression for subarrays finally pushed.
  • Everett Schlawin asks if the introduction of a slit to LRS implies no shadow region effect. Sarah Kendrew confirms that the shadow effect will be gone when using MIRI with a the slit. Right now, the slit only allows FULL array readout, so the dynamic range is limited compared to the case where the a subarray is used in slitless mode.

10minPast and future TSO observations

  • Nikolay Nikolov presents planned and past TSOs. Most used mode is NIRSpec BOTS, followed by MIRI Imaging and LERS, NIRISS SOSS and NIRCam Grism Time Series. Most observed objects are transiting exoplanets (transits and eclipses), monitoring of variability in Brown Dwarfs, ISM and variability in a black hole.
  • Michael Regan asks why ISM is observed in the TSO mode, as one can obtain high SNR in multi-dithered exposure, and the analysis by the pipeline is much easier that way.
  • Nestor Espinoza mentions that we will check with the PI and encourage them to use multi-dithered data.

10minNIRCam/DHS updates

Nestor Espinoza presents an introduction to the DHS mode for NIRCam and points out that Everett Schlawin will be leading a tiger team to analyze data from relevant calibration program PID 4453. Data is expected in the coming days. Everett Schlawin mentions that the team welcomes more expertise including, optical/wavefront expertise. Michael Regan mentions that the DHS mode has not been designed for science, but rather an engineering capability for the alignment of the segments. However, the unique readout modes present opportunities for enhancing data collection.

25minPossible specifications SUBSTRIPE/SUPERSTRIPE for TSOs

Nestor Espinoza continues talk on SUBSTRIPE and SUPERSTRIPE readout patters as the next steps in improving TSOs.

  • Instrument roundtable check-in


Sarah Kendrew mentions that the TA will be optional for MIRI
Michael Regan investigated a micrometeorite activity and concluded that there is up to 2sec out-of-synch in the time stamps of the individual instruments. Only NIRCam SW and LW channels appear to be well in synch, but not Module A and Module B.
Nestor Espinoza reports that the SOSS team is implementing the 'pasta soss' algorithm, which traces orders 1 and 2 to correct for displacements causes by the rotation of the filter wheel. Aarynn Carter mentions an ongoing work on systematic errors in SOSS TSOs.
Nestor Espinoza mentions effort to make the FGS data automatically available to each TSO observation, because this data is highly-complementary for the analysis of the science exposures.
Nikolay Nikolov mentions that BOTS zodiacal background program has been continued and data from C2 is coming soon for analysis. He mentions steps in the STScI pipeline parameters that can be made to enable quick production of useful stage3 products for the JWQL.