K2: Status and Future

A talk by Geert Barentsen on behalf of NASA's K2 Mission for the Transiting Exoplanets Meeting held at Keele University on July 17, 2017.

Transcript

1. K2: Status and Future
   Geert Barentsen
   Director, Kepler/K2 GO
   

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2. 200
   refereed K2 publications
   Thank you!
   

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3. NASA will fund K2

   through end of fuel
   

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4. K2 was top-ranked in NASA’s 2016 Senior Review
   Panel report: “… K2 includes worldwide participation
   covering every continent except Antarctica …”
   Red crosses show K2 paper authors and co-authors
   

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5. K2 publications by science topic
   

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6. Data: NASA Exoplanet Archive
   Number of published K2 planets by Campaign
   

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7. Data: NASA Exoplanet Archive
   K2 vs Kepler Confirmed Planets
   Normalized
   

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8. HIP 41378 (5)

   HD 3167 (2*)
   HD 106315 (2)
   Data: NASA Exoplanet Archive
   K2 vs Kepler Confirmed Planets
   Normalized
   

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9. Trappist-1 (7)
   HIP 41378 (5)

   HD 3167 (2*)
   HD 106315 (2)
   Data: NASA Exoplanet Archive
   K2 vs Kepler Confirmed Planets
   Normalized
   

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10. Data: NASA Exoplanet Archive
    K2 vs Kepler Confirmed Planets
    

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11. K2’s data set will increase by 40% during
    the second half of this year
    Recent and upcoming calibrated data releases:
    - C11: 30 Jun 2017
    - C12: 2 Aug 2017
    - C13: Sep 2017
    - C14: Nov 2017
    400,000 target masks will be in the archive by end 2017.
    

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12. Raw data is now public at MAST within hours of downlink
    

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13. At Launch Now
    Thruster Fuel 11.5kg 1.1kg
    CCD Modules 21 18
    Reaction Wheels 4 2
    Distance from Earth 0 0.93 au
    Spacecraft status
    

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14. So, how much longer?
    Uncertainties:
    - Thruster performance at low fuel pressure
    - Systems beyond design life
    - Safe modes and anomalies
    New fuel-saving measures:
    - Two-wheel safe mode
    - Two-wheel data downlink
    Geert’s expectation: 17, 18, or 19 will be
    our final Campaign.
    

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15. K2 Campaign 16
    • Cancer
    • Dec 7, 2017 - Feb 25, 2018
    • Visible from the ground
    • Highlights:
    • M67
    • Beehive cluster (inc 7 planets)
    • >112 planet candidates from C5
    • Preliminary target list published in Feb
    • DDT deadline: Aug 31st
    

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16. C16, C17, C19
    

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17. peak
    -21 days
    -2 month
    +14 days
    K2 revealed a supernova with a shape similar to type Ia,
    but rise time much faster than standard Ia?!
    KSN 2015K
    Rest et al (in prep)
    

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18. Please share your ground-based plans for C16!
    See https://keplerscience.arc.nasa.gov
    

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19. Consider using ExoFOP for follow-up coordination
    https://exofop.ipac.caltech.edu
    

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20. K2 Campaign 17
    • March - May, 2018
    • Forward-facing near Virgo, hence
    also visible from the ground.
    • Provides overlap with C6:
    • improve asteroseismic S/N
    • 86 planet candidates from C6
    • 20 deg2 of new sky
    

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21. K2 Campaign 18
    • May - Aug, 2018
    • Exact repeat of Campaign 5 (M67, M44)
    • Fuel-permitting, K2 will revisit this key
    part of the sky three times, offering a
    3-year baseline and 8-month duty
    cycle.
    • Enables prime mission-like science at a
    Galactic sight line 130° away from the
    original Kepler field:
    • Exoplanet TTV’s;
    • Long-term stellar activity studies;
    • Asteroseismology.
    

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22. K2 Campaign 19
    • Aug - Nov, 2018
    • Forward-facing near Pisces
    • Large overlap with C12.
    • Highlights:
    • Trappist-1
    • Neptune
    • 2P/Encke
    

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23. K2 GO Cycle 6
    Proposal Cycle 6 covers Campaigns 17, 18, 19, during
    which we expect to run out of fuel.
    Unlike previous cycles, GO Cycle 6 proposals must
    include target lists and justifications as part of Step-1
    Deadlines:

    - Step-1 (targets): October 12, 2017

    - Step-2 (funding): April 19, 2018
    

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24. New K2 GO staff
    Ann Marie Cody Christina Hedges Michael Gully-Santiago Ze Vinicius
    keplergo@mail.arc.nasa.gov
    

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25. New: PyKE v3.0
    https://github.com/KeplerGO/PyKE
    

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26. $ pip install pyketools
    

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27. $ kepmask target-pixel-file.fits 100
    

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28. $ kepextract target-pixel-file.fits out.fits \

    —-maskfile mask.txt
    $ kepdraw out.fits
    

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29. Summary
    - There has never been a better time to start mining K2 data!
    - Propose late C16 targets by August 31 (DDT)
    - Propose C17-18-19 targets by October 12 (Cycle 6)
    More info:
    - https://keplerscience.arc.nasa.gov
    - @KeplerGO on Twitter
    

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