Open Access
Table 1
Statistics of archival HARPS observations grouped by year.
| Year | N nights | N spectra | texp (h) |
|---|---|---|---|
| 2003 | 24 | 137 | 4.8 |
| 2004 | 29 | 116 | 4.0 |
| 2005 | 7 | 28 | 0.2 |
| 2006 | 5 | 10 | 0.2 |
| 2007 | 8 | 30 | 0.4 |
| 2008 | 11 | 355 | 6.4 |
| 2009 | 10 | 349 | 7.0 |
| 2010 | 1 | 60 | 1.5 |
| 2011 | 4 | 207 | 4.3 |
| 2012 | – | – | – |
| 2013 | 18 | 354 | 9.5 |
| 2014 | 8 | 404 | 5.9 |
| 2015 | 6 | 160 | 1.6 |
| 2016 | 7 | 420 | 3.8 |
| 2017 | 20 | 2891 | 53.6 |
| 2018 | 23 | 1380 | 24.1 |
| 2019 | 9 | 1175 | 21.6 |
| 2020 | 8 | 995 | 10.6 |
| Total | 198 | 9071 | 159.4 |
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