LSD analysis and longitudinal magnetic field from SPIRou spec-tropolarimetric data. The top panel shows the Stokes I (red points) with a Voigt profile model fit (green line), Stokes V (blue points), and null (dark cyan points) LSD mean profiles. The absence of the characteristic “S” shape in the Stokes V profile indicates a nondetection of a Zeeman signature. In the bottom panel, the longitudinal magnetic field (green points) measured across the five epochs observed by SPIRou displays an average value of ${\overline{B}}_{\ell }=-2.5\pm 14.6\text{\hspace{0.17em}G}$, which is also consistent with a null value.