BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:HARPS-N Observes the Sun as a star - Xavier Dumusque (Geneva)
DTSTART:20161109T160000Z
DTEND:20161109T170000Z
UID:TALK68198@talks.cam.ac.uk
CONTACT:Ed Gillen
DESCRIPTION:Stellar signals in radial-velocity measurements currently limi
 t the detection of Earth-twins using Doppler spectroscopy.To investigate p
 ossible ways for correcting stellar signals we have built a solar telescop
 e to feed full-disk sunlight into the HARPS-N spectrograph\, the nowadays 
 most precise planet hunter. This setup enables observation of the Sun as-a
 -star with long-term sub meter-per-second precision. We can then use Solar
  Dynamic Observatory (SDO) images to link any radial velocity perturbation
  with physical changes on the solar surface.\n\nDuring this talk\, I will 
 present the first year of data. With observations of the Sun every possibl
 e day for a few hours\, this data set represents our best chance of unders
 tanding deeply stellar signals\, to test the best observational strategies
  to look for exoplanets\, and to find correction techniques to mitigate th
 e impact of stellar signals.
LOCATION:Martin Ryle Seminar Room\, Kavli Institute
END:VEVENT
END:VCALENDAR