everest is an open-source pipeline for removing instrumental
noise from light curves
generated by K2. The code exploits correlations across the pixels on the Kepler CCD to
remove systematics introduced by the spacecraft's pointing error, yielding light curves
with precision comparable to that of the original Kepler mission.
Check out the links at the top for the code, the paper, the documentation, and access to
MAST database of everest light curves.
Light curve of K2-32 (EPIC 205071984), a star slightly less massive than the Sun
hosting at least four transiting planets.
The top panel shows the raw simple aperture photometry (SAP) flux, which
is dominated by the 6- and 12-hour thruster firing events designed to keep
the spacecraft pointing relatively stable.
The bottom panel shows the light curve after de-trending with everest, where the transits of three of the planets
are clearly visible to the eye. For this target, everest improved the photometric precision of the
curve by more than a factor of ten.