Table 2
Time delays between the variations in the various Stokes parameters for the four epochs shown in Fig. 8.
| 10 January 2003 | 21 February 2004 | |||||
| Stokes pair | Δt (min) | ρ | Stokes pair | Δt (min) | ρ | |
| I − Q | –90 | 0.55 | I − Q | –51/–19∗ | –0.52/0.44∗ | |
| I − U | –84∗/–14 | –0.63∗/0.53 | I − U | –63∗/-30 | –0.71∗/0.72 | |
| Q − U | –2∗/–89 | –0.41∗/0.56 | Q − U | –39∗/–11 | –0.59∗/0.56 | |
| 12 February 2005 | 22 January 2006 | |||||
| Stokes pair | Δt (min) | ρ | Stokes pair | Δt (min) | ρ | |
| I − Q | –66/–36∗/–5 | –0.41/0.50∗/–0.49 | I − Q | –77 | 0.89 | |
| I − U | –65∗/–36/–4 | –0.48∗/0.42/0.40 | I − U | –75 | –0.65 | |
| Q − U | –61/–29∗/2/29 | 0.39/–0.26∗/0.39/–0.42∗ | Q − U | 6 | –0.60 | |
Notes. In the 21 February 2004 and 12 February 2005 datasets there are multiple peaks with similar correlation coefficients, ρ, and in these cases we report the delay and correlation coefficient associated with each peak. A negative delay, Δt, between Stokes parameters X and Y means that the variations in Stokes parameter Y lag those in X. The time-delay values indicated by asterisks represent the most likely delays subject to the additional constraint that the sign of the cross-correlation is preserved between epochs, and that the Q − U delay is consistent with the I − Q and I − U delays. We estimate the error associated with each measurement of Δt to be ≈ 2 min (1σ). By far the largest source of error in the time lag relates to the ambiguities introduced by aliasing.
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