All Tables

Table 1: Details of VLT observations. The provided $\alpha$ and $\delta$ coordinates refer to epoch 2000 as measured in the course of the SPY project (see Koester et al. 2001). Spectral types, $T_{\rm sp}$ , and measured V magnitudes were taken from the catalogue of McCook & Sion (1999).
Table 2: Magnetic fields derived from the H $\gamma$ and H $\beta$ lines for our sample of white dwarfs. $B({\sigma })$ provides the magnetic field in units of the $\sigma$ level. Detections exceeding the $3\sigma$ levels are given in bold. $\sigma (V)$ is the standard deviation of the observed (V/I)-spectrum obtained inthe region 4500-4700 Å. Lower limits on the detectability of the magnetic field from the line polarisation peaks, calculated at the $1\sigma$ level of the noise, are given in the last two columns. Multiple observations that were averaged prior to analysis are labeled AVERAGE.
Table 3: Fitted parameters of the white dwarfs and supplementary data from literature. The three objects with positive detections of magnetic fields are labelled in bold face.