Image Details
Caption: Figure A1.
Retrieved planetary RV curves using either the intrinsic stellar spectrum or a template built from 50 observations, shown for three S/N regimes. There is also a BERV that contributes to the overall RV curve, however, only the planetary RV is plotted. Results are displayed for both SPIRou’s native sampling and an instrument with 4 pixels per FWHM. Semitransparent points show per-order RVs; opaque points show the order-combined RV. At SPIRou resolution, interpolation error from the template introduces random RV offsets, especially at high and moderate S/Ns, which are absent at finer sampling or when using the intrinsic spectrum.
© 2025. The Author(s). Published by the American Astronomical Society.