Table 3
Cycles from the literature where no long-term variation was found by the automatic search.
| Karmn | Name | SpT(a) | No. of spectra | Time baseline (a) |  cycle(b) (a) |
Visual inspection | (a) | Literature cycle (a) | (a) |
|---|---|---|---|---|---|---|---|---|---|
| J06371+175 | HD 260655 | M0.0 | 115 | 6.1 | 7.3(c) (13.7) | lin(Ca), pa(Hα,TiO); 2nd peak at 14.5 a |
2–3 DA19 | 4.9±0.4 SM16 | |
| J19346+045 | BD+04 4157 | M0.0 | 53 | 3.2 | … | 3.0±0.8 DA19 | |||
| J17303+055 | BD+05 3409 | M0.0 | 53 | 2.5 | 11.9(c) (12.3) | pa (Hα+Ca) | 11.9 Per21 | ||
| J18353+457 | BD+45 2743 | M0.5 | 16 | 1.2 | … | too few data | 2.3±0.SM18 | ||
| J18580+059 | BD+05 3993 | M0.5 | 32 | 1.3 | Exist (10.8) | lin(Hα+Ca) | 5.6±0.1 SM 18 | ||
| J20451−313 | AU Mic | M0.5 | 90 | 1.3 | … | 4.8,2.8 K19 | 40.6 BK20 | ||
| J22021+014 | BD+00 4810 | M0.5 | 75 | 3.1 | Exist (14.3) | lin | 8.5±1.1 SM16 | ||
| J00051+457 | GJ 2 | M1.0 | 52 | 1.9 | Exist (14.0) | 3.2±0.1 SM18 | |||
| J00183+440 | GXAnd | M1.0 | 213 | 4.1 | Exist (14.1) | Weak pa(Hα, TiO) | 2.8±0.5SM18 | ||
| J07361−031 | BD-02 2198 | M1.0 | 45 | 6.0 | … | Known binary (Ba21) | 11.5±1.9 DA19 | ||
| J22559+178 | StKM 1-2065 | M1.0 | 11 | 1.4 | … | Too few data | 2–3 DA19 | 4.4±0.9 SM18 | |
| J10122−037 | AN Sex | M1.5 | 74 | 2.2 | 2.6 (16.2) | 3.2 ±0.4 DA19 | 13.6±1.7 SM16 | ||
| J11033+359 | Lalande 21185 | M1.5 | 376 | 4.9 | 13.2(c) (14.9) | 3.2a cycle (Hα) | 7.9 SN20 | ||
| J13457+148 | HD 119850 | M1.5 | 249 | 2.2 | Exist (17.5) | 9.9±2.8 SM16 | |||
| J15218+209 | OT Ser | M1.5 | 52 | 2.8 | 7.3(c) (9.3) | 6.5±0.8 DA19 | |||
| J04429+189 | HD 285968 | M2.0 | 23 | 1.0 | 7.3(c) (13.8) | weak lin trend | 5.9±0.7 SM16 | 5.6 GdS12 | |
| J08161+013 | GJ 2066 | M2.0 | 70 | 5.0 | 7.4 (11.3) | pa(Ca) | 4.1±0.7 DA19 | ||
| J11000+228 | Ross 104 | M2.5 | 55 | 2.2 | 0 7 (8 1) | lin (TiO) | 5.3±0.6 SM16 | ||
| J12350+098 | GJ 476 | M2.5 | 9 | 4.8 | … | Too few data | 2.9 Rob13 | ||
| J06548+332 | Wolf 294 | M3.0 | 342 | 6.1 | 9.0 (14.0) | 4.5 a cycle (Hα) | 1.6 SN20 | ||
| J10196+198 | AD Leo | M3.0 | 44 | 1.9 | … | Data gap; lin | 27 AK17 | 7.6 Buc14 | |
| J15194−077 | HO Lib | M3.0 | 52 | 3.5 | 4.0(c) (10.7) | lin (TiO) | 4.5 K19/Rob13 | 6.2±0.9 SM16 | 3.85 GdS12 |
| J08409−234 | LP 844-008 | M3.5 | 28 | 4.2 | Exist (13.0) | lin (TiO+Ca), pa (Hα) | 5.2±0.3 SM16 | ||
| J13427+332 | Ross1015 | M3.5 | 19 | 4.0 | … | Too few data | quadr trend Rob13 | ||
| J16303−126 | V2306 Oph | M3.5 | 88 | 3.5 | 4.2(c) (11.2) | pa(Hα) | 3.9±1.0 DA19 | 4.4±0.2 SM16 | |
| J22096−046 | BD-05 5715 | M3.5 | 59 | 3.4 | Exist (15.0) | pa (Hα+TiO) | 10.2±0.9 SM16 | ||
| J18498−238 | V1216 Sgr | M3.5 | 51 | 1.0 | Exist (13.3) | 4.9 K19 | 7.1±0.1/2.1±0.1 SM16 | 4.1/1.0 IB21 | |
| J11477+008 | FI Vir | M4.0 | 51 | 3.0 | Exist (14.2) | pa (TiO) | 4.5±2.0 DA19 | 4.1 ±0.3 SM16 | |
| J20525−169 | LP 816-060 | M4.0 | 35 | 4.4 | … | pa (Hα+Ca) | 10.6±1.7 SM16 | ||
| J22532−142 | IL Aqr | M4.0 | 67 | 3.5 | Exist (14.8) | 4.5±0.7 DA19 | |||
| J07446+035 | YZCMi | M4.5 | 48 | 2.0 | … | Weak lin trend (Hα+Ca) | 10.6±1.7 SM16 | ||
| J08413+594 | LP 090-018 | M5.5 | 51 | 3.9 | … | 14 LS20 | |||
| J10564+070 | CN Leo | M6.0 | 66 | 2.2 | … | 8.9±0.2 SM16 | |||
| J08298+267 | DX Cnc | M6.5 | 29 | 4.8 | … | lin(TiO), 2.5a cycle insignificant (Hα,Ca) | 2.67 BK20 |
Notes. (a)Spectral (sub-)type of M. (b)Given in parentheses is the observation time baseline for the 
measurements.(c) Automatic detection of the period based on RHK data alone, see Sect. 4.4.
References. AK17: Alekseev & Kozhevnikova (2017); Ba21: Baroch et al. (2021); BK20: Bondar' & Katsova (2020); Buc14: Buccino et al. (2014); DA19: Díez Alonso et al. (2019); GdS12: Gomes da Silva et al. (2012); IB21: Ibañez Bustos et al. (2021); K19: Küker et al. (2019); LS20: Lopez-Santiago et al. (2020) Per21: Perdelwitz et al. (2021); Rob13: Robertson et al. (2013); SM16: Suárez Mascareño et al. (2016); SM18: Suárez Mascareño et al. (2018); SN20: Stock et al. (2020).
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