10 July, 2018 - The "reprocessed" Cotrending Basis Vector file for
data release 24, campaign 13 is now available for download. The previous versions will be
stored in the "old_release_files" subdirectory.
02 Oct. 2017 - NOTE: The NEXTEND keyword
in CBV files was incorrectly assigned to a value of 2. The headers have been updated i
to the correct value of 84.
As data is reprocessed, so will the CBVs. Be sure to use CBVs
with the same Data Release number as your data.
Below is the current list of available Cotrending Basis Vector (CBV) files.
These data products can be used to remove instrumental systematics from the
K2 light curves. There is one FITS file per campaign. Each file
contains 84 extensions, one for each CCD channel, and 16 basis
vectors per channel. These basis vectors can be fit to the K2
SAP flux vector and the best fit vectors subtracted to significantly
reduce systematic trends in the time series.
To download a particular file, click on the appropriate File Name below.
Alternatively, ftp to archive.stsci.edu and cd to
/missions/k2/cbv/ to see and/or download the complete list.
Clicking on the linked data release numbers will display the corresponding
data release notes (if available).