Space Telescope and Optical Reverberation Mapping Project 2: Photoionized absorption features in the high-resolution X-ray spectra of Mrk 817

Studying the structure and kinematics of AGN outflows with X-ray observations informs our understanding of black hole accretion and AGN feedback. This X-ray campaign is part of an ongoing, intensive, multi-wavelength monitoring program of the Seyfert 1 galaxy Mrk 817 by the Space Telescope and Optical Reverberation Mapping Project 2. The initial phase of the campaign revealed unexpected obscuration of Mrk 817.

In this talk, I will present the XMM-Newton/NuSTAR observations taken during the campaign, with particular attention to one fortuitous observation taken during a bright flare that reveals strong narrow absorption lines in the high-resolution gratings spectra.

We detect a multiphase ionized wind at an outflow velocity of ~5000 km/s, and for the first time find evidence for a lower ionization component of the same velocity in the simultaneous HST spectra. We discuss implications of these results in the context of recent hydrodynamical simulations of AGN outflows.