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Swift and LCO Reverberation Mapping of a Supermassive Black Hole Binary Candidate

Presentation #102.01 in the session AGN Posters.

Published onMay 03, 2024
Swift and LCO Reverberation Mapping of a Supermassive Black Hole Binary Candidate

We present an intensive broadband reverberation mapping campaign on the supermassive black hole binary (SMBHB) candidate PG 1302-102. The source was observed with Swift and the Las Cumbres Observatory (LCO) network at a ~daily cadence for 9 months in 14 bands. We measure a wavelength-dependent lag spectrum and estimate its accretion disk size. The source resembles other reverberation-mapped AGN in many respects, and we do not find evidence for a “minidisk” around the secondary black hole. Nevertheless, we demonstrate the feasibility of studying SMBHBs from this novel angle and suggest the possibility that an SMBHB could be identified on a timescale that is shorter than the orbital timescale.

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