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AGN STORM 2: Photoionized absorption features in the high-resolution X-ray spectra of Mrk 817

Presentation #401.01 in the session Active Galactic Nuclei II.

Published onJul 01, 2023
AGN STORM 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 inform our understanding of black hole accretion and AGN feedback. In this talk, I will present the results of the X-ray campaign of the ongoing, intensive multi-wavelength monitoring program of the Seyfert 1 galaxy Mrk 817 by the AGN Space Telescope and Optical Reverberation Mapping 2 (AGN STORM 2) Project. The campaign revealed an unexpected and transient obscuring outflow, never before seen in this source.

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.

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