Vector Magnetograph Observations by the Solar Flare Telescope at Boao

We report that vector magnetograph (VMG)observations of the solar photosphere are being carride out by the Solar Flare Telescope (SOFT)at BOAO.The VMG uses a narrow band Lyot filter (FWHM =0.125A)for Stokes parameter (I, Q, U, V)observatio ns to obtain longi tudinal and transverse fields.We have obtained a filter-convolved line profile of Fe I 6302.5 for VMG by changing the central wavelength of the Lyot filter, which is consistent with the Sacremento Peak spectral atlas data.Using the line profile, we have determined calibration coef ficients of longitudinal and transverse fields by the line slope method.Then we have compared vector fields of AR8422 observed at BOAO with those at Mitaka.The comparison shows that longitudinal fields are very similar to each other, but transverse fields are a little dif ferent.Finally, we present Hα and magnetic observations of AR8419 during its flaring activity (M3.1/1B).