The CARMENES search for exoplanets around M dwarfs - Stable radial-velocity variations at the rotation period of AD Leonis: A test case study of current limitations to treating stellar activity

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Table 2

Summary of the extensive spectroscopic data set for AD Leo.

Instrument	CARMENES VIS		CARMENES NIR		HIRES	HARPS	HARPS-N		GIANO-B		HPF
Δλ (nm)	520–960		960–1710		500–620	380–690	390–680		970–2450		810–1280
R	94 600		80 400		60 000	115 000	115 000		50 000		55 000
Subset^(a)	VIS1	VIS2	NIR1	NIR2			HT1	HT2	G1	G2	HPF1	HPF2
# of spectra	26	20	26	20	43	47	42	21	12	13	5	30
rms (m s⁻¹)	18.54	15.63	16.44	13.61	20.74	24.23	21.97	10.51	17.92	18.41	19.01	6.68
Start date	Mar. 2018	Feb. 2020	Mar. 2018	Feb. 2020	Jun. 2001	Dec. 2003	Apr. 2018	Nov. 2018	Apr. 2018	May. 2008	Apr. 2018	Dec. 2018
End date	Apr. 2018	Feb. 2020	Apr. 2018	Feb. 2020	Dec. 2013	May. 2014	Jun. 2018	Jan. 2019	May. 2018	Jun. 2018	Apr. 2018	Feb. 2020

Notes. All instruments used for the analysis along with their wavelength range, spectral resolution, and number of spectra are listed. ^(a)A subset is treated effectively as an independent data set.

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