10.13 Solar-like rotational modulation 10.13.2 Properties of the input data 10.13.4 Processing steps

10.13.3 Calibration models

At first order, rotational modulation light curves can be modelled with a simple sinusoidal function. If a significant period $P$ is detected in one of the time series segments defined in Section 10.13.4, then the model

$m(t)=a_{m}+b_{m}\cos\left(\frac{2\pi t}{P}\right)+c_{m}\sin\left(\frac{2\pi t}% {P}\right)$

(10.16)

is fitted to each of the $m\in(G,G_{\rm BP},G_{\rm RP})$ time series segments. This produces model coefficients $a_{m}$ , $b_{m}$ , and $c_{m}$ for each segment in which a significant period is detected.

gaia data release 3 documentation

10.13.3 Calibration models