Observations and analysis of the full Stokes vector in a flaring region in the He I 1083.0 nm multiplet

We present observations of the full Stokes vector in a flaring region, taken in the chromospheric He I 1083.0 nm multiplet and in the photospheric Si I 1082.7 nm line.
The data were recorded with the new Tenerife Infrared Polarimeter (TIP 2) at the German Vacuum Tower Telescope (VTT) during May 2005. The He profiles during the flare are extraordinary, showing very complex (and spatially variable) Stokes I absorption and Stokes V signature. We reconstruct the line-of-sight flow field and the magnetic field structure in the chromosphere and in the photosphere for this flaring region by applying inversion code to the He I and the Si I Stokes profiles.
We compare our dataset with the EIT (Extreme ultraviolet Imaging Telescope) data to find connections between the features we observe in the lines and the coronal flare event.