analyze the possibility that the signal comes from a star on a nearby sightline, and precise radial-velocity monitoring to measure the companion’s mass.

Photometry {#sec:phot}
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### TESS

TESS observed Sector 1 from the 25th of July to the 22nd of August 2018 [^4], a 27.4-day interval that is typical of each sector. L 168-9 is listed in the Cool Dwarf Catalog that gathered the known properties of as many dwarf stars as possible with $V-J>2.7$ and effective temperatures lower than 4000 K [@Muirhead2018]. The predicted TESS-band apparent magnitudes are also given in this catalog. L 168-9 was chosen for 2-min time sampling as part of the TESS Candidate Target List [CTL, @StassunTIC:2018], consisting of a subset of the TESS Input Catalog (TIC) identified as high-priority stars in the search for small transiting planets. Time series observations of L 168-9 were made with CCD 2 of Camera 2.

The TESS Science Processing Operations Center (SPOC) at the NASA Ames Research Center performed the basic calibration, reduction, and de-trending of the time series, and also performed the search for transit-like signals [@Jenkins2016]. The light curves were derived by the SPOC pipeline and consist of a time series based on Simple Aperture 