Ultraviolet Spectropolarimetry of GRW+70 8247 with the HST Faint Object Spectrograph

Astronomy and Astrophysics – Astronomy

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Scientific paper

Spectropolarimetric observations of the magnetic white dwarf GRW+70 8247 in the lambda lambda 1280--1600 range were obtained with the Faint Object Spectrograph aboard the Hubble Space Telescope. A dramatic increase in both the linear and circular polarization was found to coincide with a decline in the continuum flux below 1500 Angstroms . High levels of linear (20%) and circular (12%) polarization were observed in the lambda lambda 1300--1400 range and were not confined to the well-known absorption feature at 1347 Angstroms . This work is supported by NASA grant NAG 5-1630.

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