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 Kepler light curves. For a given data release, there is one FITS file per quarter. Each file contains 84 extensions, one for each CCD channel, and 16 basis vectors per channel. These basis vectors can be fit to the Kepler 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/kepler/cbv/. Files from various earlier releases are also downloadable from this directory.

Click on the linked data release number below to display the latest data release notes. See the Kepler Archive Manual for a description of the CBV file format, and see Chapter 7 of the Data Characteristics Handbook for more information on the CBV characteristics and how to use them.

For a tool to fit and apply CBVs to your K2 light curve, see the kepcotrend task available with the PyKe software package