Mitigating stellar radial velocity jitter using orthogonal activity indices and a time-aware neural network

Open Access

Table 3

Radial velocity statistics before and after CANSTAR correction.

Statistic (m s⁻¹)	ϵ Eri	TZ Ari
RMS
Original (RMS_pre)	4.69	10.79
Corrected (RMS_post)	2.46	6.71
RRE	52.5%	62.4%
MAD
Original MAD_pre	3.92	8.85
Corrected MAD_post	2.00	5.02
rMAD	51.1%	57.4%
Uncertainty budget
Photon noise (σ_phot)	0.29	2.44
Model uncertainty (σ_model)	1.07	4.49
Final error $(\sqrt{σ_{phot}^{2} + σ_{model}^{2}})$ $Mathematical equation: $\left( {\sqrt {\sigma _{{\rm{phot}}}^2 + \sigma _{{\rm{model}}}^2} } \right)$$	1.11	5.19

Notes. RMS: root mean square; RRE: residual relative error; MAD: median absolute deviation; rMAD: relative median absolute deviation. The original values for TZ Ari are given after subtracting the fitted Keplerian model.

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