Variations in housekeeping data monitored at different locations of the SOPHIE instrument with a cadence of 6 min. The pressure corresponds to the internal pressure inside the nitrogen-filled tank where the dispersal elements are located. The temperature is monitored in the air of the container, the air in the spectrograph, the shutter, the east and west granite benches, the grating, the cryostat cover, the ferrule, and the Coudé tube (path of the fibres from the telescope to the spectrograph; see Perruchot et al. (2008) and the Haute-Provence Observatory website for more details). Near BJD = 2 457 700, the SOPHIE thermal regulation was upgraded, improving the temperature stability inside the spectrograph.