Open Access
Table 1
Basic information about the Ca II observations.
| Telescope | No. spectra | JD first (day) | JD last (day) | Covered years |
|---|---|---|---|---|
| Mount Wilson | 4336 | 2439786.8 | 2449771.6 | 1967–1995 |
| CPS | 168 | 2452267.7 | 2455415.1 | 2001–2010 |
| SMARTS | 146 | 2454334.7 | 2456324.0 | 2007–2013 |
| Lowell Obs. | 267 | 2449258.9 | 2458154.5 | 1993–2018 |
| TIGRE | 322 | 2456518.9 | 2459624.6 | 2013–2022 |
| All data | ||||
| 1 day binning | 1578 | |||
| TIGRE Ca II IRT | 303 | 2456518.9 | 2459624.6 | |
| Excluded times | 2456992.0 | 2457159.0 | ||
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