Table 3
Journal of observations and results of magnetic measurements of σ Lup.
| Nr. | Obs.1 | Date2 | HJD3 | t exp | S/N4 | Phase5 | Bl 6 | σ(Bl) | Nl 7 | σ(Nl) | |
| −2 450 000 | s | pxl-1 | G | G | G | G | |||||
|
|
|||||||||||
| 1 | A | 2007-12-28 | 4463.24031 | 4 × 400 | 880 | 0.141 | 79 | 20 | 4 | 20 | |
| 2 | A | 2008-01-01 | 4467.25522 | 4 × 400 | 620 | 0.470 | −69 | 27 | −4 | 27 | |
| 3 | A | 2008-12-15 | 4816.25084 | 4 × 400 | 720 | 0.043 | 75 | 25 | 8 | 25 | |
| 4 | A | 2008-12-16 | 4817.24836 | 4 × 400 | 720 | 0.373 | −39 | 24 | −7 | 24 | |
| 5 | A | 2008-12-17 | 4818.24066 | 4 × 400 | 360 | 0.702 | 95 | 49 | 0 | 49 | |
| 6 | C | 2009-02-17 | 4880.12491 | 4 × 130 | 1015 | 0.195 | 69 | 24 | 22 | 24 | |
| 7 | C | 2009-02-17 | 4880.13320 | 4 × 130 | 1188 | 0.198 | 96 | 21 | −4 | 21 | |
| 8 | C | 2009-02-17 | 4880.14136 | 4 × 130 | 1140 | 0.201 | 52 | 22 | 9 | 22 | |
| 9 | A | 2009-04-08 | 4930.25755 | 4 × 400 | 750 | 0.797 | 57 | 24 | −23 | 24 | |
| 10 | C | 2010-02-27 | 5255.10549 | 4 × 200 | 1114 | 0.373 | −70 | 22 | 1 | 22 | |
| 11 | C | 2010-03-02 | 5258.09114 | 4 × 200 | 1021 | 0.361 | −15 | 24 | −37 | 24 | |
| 12 | C | 2010-03-03 | 5259.08881 | 4 × 200 | 779 | 0.692 | −15 | 31 | −15 | 31 | |
| 13 | C | 2010-03-04 | 5260.08395 | 4 × 200 | 1099 | 0.021 | 117 | 22 | −20 | 22 | |
| 14 | C | 2010-03-05 | 5261.10469 | 4 × 200 | 959 | 0.359 | −43 | 25 | −6 | 25 | |
| 15 | C | 2010-03-07 | 5263.05040 | 4 × 200 | 1303 | 0.004 | 114 | 19 | −13 | 19 | |
| 16 | C | 2010-03-07 | 5263.08299 | 4 × 200 | 1326 | 0.014 | 103 | 19 | −3 | 19 | |
| 17 | C | 2010-03-08 | 5264.02698 | 4 × 200 | 490 | 0.327 | −28 | 50 | 26 | 50 | |
| 18 | C | 2010-03-08 | 5264.03882 | 4 × 200 | 624 | 0.331 | −30 | 39 | 27 | 39 | |
| 19 | C | 2010-03-08 | 5264.12734 | 4 × 200 | 744 | 0.360 | −31 | 33 | −40 | 33 | |
| 20 | C | 2010-05-28 | 5344.86081 | 4 × 200 | 908 | 0.096 | 73 | 40 | 3 | 40 | |
| 21 | C | 2010-05-28 | 5344.87315 | 4 × 200 | 579 | 0.100 | 14 | 186 | 28 | 186 | |
| 22 | C | 2010-05-28 | 5344.88541 | 4 × 200 | 664 | 0.104 | 173 | 62 | 75 | 62 | |
| 23 | C | 2010-05-30 | 5346.84258 | 4 × 200 | 980 | 0.752 | 27 | 28 | 23 | 28 | |
| 24 | C | 2010-05-31 | 5347.83115 | 4 × 200 | 1291 | 0.079 | 117 | 22 | 15 | 22 | |
| 25 | C | 2010-06-01 | 5348.88552 | 4 × 200 | 870 | 0.428 | −123 | 29 | 52 | 29 | |
| 26 | C | 2010-06-02 | 5349.82460 | 4 × 200 | 963 | 0.739 | 1 | 26 | 11 | 26 | |
Notes. 1. A = obtained with the SEMPOL spectropolarimeter attached to the UCLES at the AAT; C = with ESPaDOnS attached to the CFHT. – 2. Date when the first observation started. – 3. Calculated at the center of the total exposure time (texp) of Col. 5. – 4. Quality of the Stokes V spectra, expressed as the signal to noise ratio per pixel around 550 nm in the reduced spectrum. – 5. Rotational phase, calculated with Eq. (5). – 6. Longitudinal magnetic field values with their 1-σ uncertainties. – 7. Computed magnetic values of the diagnostic null (or N) spectrum with their 1-σ uncertainties.
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