Table 1
Journal of observations.
| Instrument | Date | No. spectra | Subexp. time | Stokes V duration | Average S/N |
| (s) | (s) | (LSD) | |||
|
|
|||||
| NARVAL | 25 Jul. 08 | 33 | 6 | 145 | 20750 ± 3062 |
| 26 Jul. 08 | 97 | 6 | 145 | 21705 ± 865 | |
| 27 Jul. 08 | 97 | 6 | 145 | 21549 ± 1943 | |
| 28 Jul. 08 | 30 | 6 | 145 | 17225 ± 1829 | |
| NARVAL | 22 Jun. 09 | 5 | 16 | 185 | 16913 ± 874 |
| 23 Jun. 09 | 6 | 16 | 185 | 29562 ± 1256 | |
| 27 Jun. 09 | 5 | 16 | 185 | 20776 ± 934 | |
| 04 Jul. 09 | 33 | 16 | 185 | 25596 ± 6128 | |
| 05 Jul. 09 | 31 | 16 | 185 | 26964 ± 3683 | |
| ESPaDOnS | 08 Sep. 09 | 99 | 4 | 135 | 22190 ± 1428 |
| 09 Sep. 09 | 82 | 4 | 135 | 22438 ± 1011 | |
| 10 Sep. 09 | 135 | 4 | 135 | 19304 ± 3099 | |
| NARVAL | 26 Oct. 09 | 35 | 12 | 170 | 16829 ± 730 |
| 27 Oct. 09 | 51 | 12 | 170 | 19855 ± 946 | |
| 31 Oct. 09 | 58 | 12 | 170 | 23561 ± 4674 | |
| 01 Nov. 09 | 1 | 12 | 170 | 17 598 | |
| 03 Nov. 09 | 1 | 12 | 170 | 15 990 | |
Notes. from left to right, we list the instrument used for observing, the date, the number of spectra collected during the night, the exposure time of individual subexposures, the total duration of a Stokes V sequence (including detector readout and rotation of Fresnel rhombs) and the average and standard deviation of the S/N values of Stokes V LSD profiles across the night (calculated for spectral bins of 1.8 km s-1).
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