Table 4
Linear fits on the Stokes plane of SN 2008D/XT 080109 when no constant Stokes parametres are assumed for SN 2007uy.
Telescope | Number of | Minimum | Orientation angle | Lower error bar | Upper error bar |
visits | χ2/d.o.f. | (degrees) | (degrees) | (degrees) | |
|
|||||
CAHA | 2 | 0a | 88.9 | 53.9b | 48.8b |
NOT | 3 | 0.001/1 | –64.8 | 46.1 | 46.7 |
VLT | 6 | 5.501/4 | –86.7 | 27.9 | 26.8 |
CAHA+VLT+NOT | 11 | 9.599/9 | –49.8 | 17.4 | 17.2 |
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 corresponding straight lines are shown in the upper panel of Fig. 1. 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 more scattered orientations (and also larger χ2/d.o.f. values) than the ones displayed in Table 3, but they are still consistent within errors. Last table line reports the results when all the data are combined.
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