Session 11 - AGN.
Display session, Monday, January 13
Metropolitan Ballroom,

## [11.05] Discovery of the Hidden Seyfert 1 Nucleus in Markarian 463

C. A. Tremonti, A. Uomoto (JHU), R. R. J. Antonucci (UCSB), Z. I. Tsvetanov, H. C. Ford, G. A. Kriss (JHU)

Hubble Space Telescope imaging polarimetry of the Seyfert 2 galaxy Markarian 463 E has revealed the location of an obscured Seyfert 1 nucleus. Curiously, the Seyfert 1 is not co-spatial with the optically bright Seyfert 2, but is located 1\arcsec (\sim 1 kpc) to the south, at the tip of what was previously thought to be an optical jet. The high spatial resolution broad-band UV imaging achieved with the Faint Object Camera reveals a distinct cone of highly polarized (13 \pm 3 %) light fanning northward from the obscured nucleus. The magnetic polarization vectors point at the cone's apex, indicating that te wedge of illuminated material (opening angle \sim 70$$^\circ$$ is the scattering mirror that allows us to see the Seyfert 1 core.