Table 3
Linear fits on the Stokes plane of SN 2008D/XT 080109.
| Telescope | Number of | Minimum | Orientation angle | Lower error bar | Upper error bar |
| visits | χ2/d.o.f. | (degrees) | (degrees) | (degrees) | |
|
|
|||||
| CAHA | 2 | 0a | –76.1 | 49.4b | 48.5b |
| NOT | 3 | 0.001/1 | –64.8 | 46.1 | 46.7 |
| VLT | 6 | 1.198/4 | –54.8 | 52.2 | 51.8 |
| CAHA+VLT+NOT | 11 | 1.922/9 | –42.6 | 23.3 | 22.9 |
Notes.
In this particular case, χ2 = 0 and d.o.f. = 0 for the minimum, so χ2/d.o.f. could also be formally represented by 0/0.
The linear fits are shown in the bottom panel of Fig. 1, where we used SN 2007uy as a reference star with constant Stokes parametres. Column 1 displays the telescope used and Col. 2 the number of visits or points on the Stokes plane. Column 3 provides the χ2/d.o.f. of the optimal linear fit. Column 4 shows the orientation angles at the minima (maxima) of Fig. 3 upper (bottom) panel. Columns 5 and 6 provide the lower and upper error bars around the orientation angle of the linear fit. As seen the three independent data-sets (CAHA, NOT and VLT) show orientations well consistent within errors. Last table line reports the results when all the data are combined.
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