bright enough to L 168-9 to have possibly caused the TESS detection as potential sources of the TESS detection.

### WASP

WASP-South, located in Sutherland, South Africa, is the southern station of the *Wide Angle Search for Planets* [WASP, @Pollacco2006]. It consists of an array of 8 cameras each backed by a 2048x2048 CCD. Observations in 2010 and 2011 (season A) used 200mm, f/1.8 lenses with a broadband filter spanning $400-700$ nm and a plate scale of $13.7\arcsec$/pixel. Then, from 2012 to 2014 (season B), WASP-South used 85mm, f/1.2 lenses with a Sloan r’ filter and a plate scale of $32\arcsec$/pixel. The array rastered a number of fields each clear night at typically 10-min cadence.

L 168-9 was monitored for four consecutive years, from to May 20, 2010 to December 12, 2014; typically covering 150 days in each year. In one campaign two cameras with overlapping fields observed the star, giving a total of 27300 data points; in another campaign, L 168-9 was observed by three cameras with overlapping fields, totalling 170000 data points. The photometry has a dispersion of 0.027 $\delta$mag and average uncertainty of 0.024 $\delta$mag, presenting clear signs of variability, as shown below in Sec. \[subsec:rotation\].

High-resolution 