Table 2
The median S/N (in the 5th order index), median radial velocity error (![$\[\tilde{\sigma}_{\text {HPF}}\]$](/articles/aa/full_html/2026/02/aa56483-25/aa56483-25-eq11.png)
) of the HPF observations, as well as measurements of various activity and multiplicity indicators.
| Target | S/N | ![$\[\widetilde{\sigma}_{\text {HPF}}\]$](/articles/aa/full_html/2026/02/aa56483-25/aa56483-25-eq12.png) (m s−1) |
Prot (d) | Flare rate (d−1) | LHα/Lbol (×10−4) | Ca IRT Emission | RUWE | Designation |
|---|---|---|---|---|---|---|---|---|
| GJ 625 | 126 | 3.3 | 80 ± 8 | 0.015(<0.036) | 0.06 | Low | 1.0 | |
| GJ 1151 | 116 | 2.6 | 125 ± 13 | <0.0059 | 0.07 | Low | 1.0 | Inactive single |
| LHS 2395 | 44 | 4.1 | − | < 0.024 | − | Low | 1.4 | |
| GJ 450 | 186 | 1.9 | 23 ± 2.3 | 0.20(<0.29) | <0.09 | High | 1.0 | |
| AD Leo | 217 | 1.3 | 2.2399 ± 0.0006 | − | 1.72 | High | 1.2 | Active single |
| GJ 3647 | 116 | 5.4 | 7.77 ± 0.8 | 1.1 ± 0.2 | 1.82 | High | 1.1 | |
| NLTT 20858 | 15 | 32 | 1.7 ± 0.17 | 0.29 ± 0.1 | − | High | 1.2 | |
| NLTT 24199 | 48 | 5.5 | 61 ± 6 | 0.35 ± 0.1 | 0.84 | High | 1.4 | |
| 2M J1431 | 20 | 240 | 0.14 ± 0.014 | 0.38 ± 0.1 | 5.95 | − | 1.1 | |
| 2M J0941 | 18 | 10 | 31 ± 3 | 0.063(<0.14) | − | High | 1.2 | |
| GJ 860 B | 302 | 1.0 | 0.41 ± 0.04 | 0.27 ± 0.07 | 0.64 | Low | − | Active, wide-separated binary |
| LSPM J1021 | 64 | 7.6 | 2.1 ± 0.2 | − | − | High | 1.2 | |
| GJ 412 B | 81 | 5.2 | 0.78 ± 0.08 | 0.23 ± 0.1 | 1.21 | − | 1.0 | |
| GJ 9552 | 311 | − | 1.98 ± 0.2 | 1.7 ± 0.1 | 1.38 | − | 39 | |
| GJ 3861 | 160 | 3.62 | 14.84 ± 0.15 | 0.42 ± 0.09 | 0.67 | − | 1.7 | |
| GJ 3729 | 105 | − | 13.58 ± 1.4 | − | 1.64 | − | 3.3 | Close visual or spectroscopic multiple |
| GJ 3789 | 169 | − | 0.11 ± 0.01 | 0.75 ± 0.2 | 3.03 | − | − | |
| 2M J1051,3 | 95 | 9.5 | − | − | 3.74 | High | 2.4 | |
| G 240-45 | 45 | 7.8 | − | 0.0069(<0.015) | − | Low | 1.3 | |
Notes. Stellar rotation periods according to the references in Table 1, TESS flare rates (Pope et al. 2021), LHα/Lbol values (Callingham et al. 2021b), whether the Ca II infrared triplet (Ca IRT) is observed to be in high emission (this work), and their Gaia DR3 RUWE values. We categorize the targets as active/inactive and single/multiple. (1)Targets shortened for space: 2MASS J09481615+5114518 (2M J094), 2MASS J14333139+3417472 (2M J143), LSPM J1024+3902E (LSPM J102), and 2MASS J10534129+5253040 (2M J105). (2)During the orbit analysis of GJ 3861 we obtain RV uncertainties of the primary and secondary component. Here, we report the median uncertainty obtained for the primary component. Note that this uncertainty is not the RV uncertainty obtained through spectral-matching with SERVAL, as are the other values in this column. (3)The target 2MASS J10534129+5253040 is not listed in the Washington Double Star Catalog, but is listed in GAIA DR3 with a high RUWE value of 2.4 and it is overluminous compared to the main sequence. Although no double line feature was seen in the HPF spectroscopic data, we therefore still include it as a close visual multiple.
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