Kepler makes several ancillary data files available to users.
Documentation regarding each file type may be found in the
Kepler Archive Manual.
Cotrending Basis Vectors (CBV) Files
The CBVs may be used to mitigate instrumental signatures in Kepler
light curves when the PDC light curve is inadequate for your science.
One CBV is available each quarter and is listed with links to
download the files along with documentation and sites describing
how to use them.
Focal Plane Characterization Models
A collection of models that describe the properties of the CCD and the
focal plane. Currently only the Pixel Response Function (PRF) is
available: a tar ball containing the entire data set is available
along with documentation.
Full Frame Image (FFI)
and Engineering Data Search
Images of the entire Kepler Field are typically taken three times
during the quarter and are used to confirm the proper orientation
and placement of the detector and to assess photometer health.
The FFI uncalibrated, calibrated and uncertainties files are available.
FFIs may also be downloaded via anonymous ftp at /pub/kepler/ffi, or
via the browser at
To display individual channels from any of the FFI images,
and overlay various catalogs,
see the FFI_Display page.
The following engineering files may also be retrieved:
Long and Short Cadence Collateral (COLL & COLS) files,
Artifact Removal Pixel (ARP) files,
Background Pixel (BKG) files,
and Reverse Clock (RVC) files.