Sector 17



× Sector 17 was reprocessed in September 2020, updating timestamps, photometric apertures, data anomaly flags, and threshold crossing events. For more deatil please see the Reprocessing Information table below.
× Warning for Sector 17: An instrument reset occurred in orbit 42 resulting in no data being collected for six minutes between TJD 1789.18374 and 1789.18790.

Sector 17 Information

For full data release notes see: DRN24, DRN30 (reprocessing). For a list of TIC IDs with noted issues, see this list.

Sector Summary

  • Sector dates: October 8 to November 2 2019
  • Pointing: Northern hemispher
  • Days of Science Data Collection: 23.51
  • Days of Paused Data Collection: 1.43



    • Spacecraft Pointing (deg)

    RA dec roll
    Spacecraft 351.24 57.85 41.97
    Camera 1 17.39 26.89 113.52
    Camera 2 3.29 48.23 122.3
    Camera 3 331.6 65.56 329.33
    Camera 4 270.0 66.57 26.51



    Orbit Summary

    Orbits Dates (UTC)

    Start - End

    		 Cadence #

    Start - End

    		 Momentum dumps
    41 2019-10-08 - 2019-10-19 386801 - 395164 Every 3.875 days
    42 2019-10-21 - 2019-11-02 396193 - 404812 Every 4.0 days



    Sector Notes

    Noted Issue Description
    Instrument reset An instrument reset also occurred in orbit 42—no data were collected for six minutes between TJD 1789.18374 and 1789.18790.
    Spacecraft pointing In Sector 17, the spacecraft pointing returned to the nominal mission pointing with Camera 4 centered on the North Ecliptic Pole. Camera 4 alone was used for guiding in both orbit 41 and orbit 42.
    Scattered light In Sector 17, the Moon and Earth move into the field of view of Camera 1 towards the end of each orbit.



    Reprocessing Information: DRN30

    The data products of sectors 14 to 19 were generated using version 4.0 of the science processing pipeline and conform to the final set of data anomaly flags. A detailed description of the changes in the data products can be found in DRN30, but a summary is provided here.

    Update Description
    Timestamps: For 2 minute cadence and FFI data the timestamps were made more accurate. The differences between reprocessed data and previous data releases are less than 2.0 seconds in all cases.
    Photometric apertures: The apertures were increased in size for targets with Tmag less than 11.
    Data Anomaly Flags: Three new flags were added to mitigate the effects of scattered light;

    - Cadences with strong scattered light signals or saturation effects that corrupt the calibration data are flagged and removed from analysis.

    - Scattered light data anomaly flags are customized for each target, and flagged automatically based on the local background level.

    - Cadences with insufficient targets to derive cotrending basis vectors are flagged and the PDCSAP FLUX light curves are set to NULL at these times

    The modifications to the data anomaly flags also changed the cotrended light curves produced by PDC. The changes also result in new cotrending basis vectors for each CCD in each sector. The scattered light flags are now only applied to the PDCSAP FLUX light curves.
    Threshold Corssing Event issue: The planet search of the reprocessed light curves produced a different set of TCEs from the original processed data. Although there is a high degree of overlap between the original and reprocessed data (∼83% of targets produced TCEs in common), new TCEs were produced and not every TCE from previous data releases was recovered.