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Table 1

Values of the V and R-band detected polarisation degrees P, and BVRI-band 3σ upper limits and polarisation angles for Cen X-4.


P (%)
0.36 ± 0.18 0.19 ± 0.16
P (3σ upper limit)
1.46% 0.90% 0.67% 0.46%
θ (°)
189.87 ± 49.13

Notes. The errors have been evaluated using contour plots in each band. In particular, to obtain the 68% c.l. we used Δχ2 = 2.3 as requested for fits with two free parameters.

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