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Investigating Non-linear and Stochastic Hard X-ray Variability of Active Galactic Nuclei using Recurrence Analysis
R. A. Phillipson, M. S. Vogeley, P. T. Boyd
We present results of recurrence analysis of 46 active galactic nuclei (AGN) using light curves from the 157-month catalog of the Swift Burst Alert Telescope (BAT) in the 14-150 ke…
Chandra, HST/STIS, NICER, Swift, and TESS Detail the Flare Evolution of the Repeating Nuclear Transient ASASSN-14ko
Anna V. Payne, Katie Auchettl, Benjamin J. Shappee +9
ASASSN-14ko is a nuclear transient at the center of the AGN ESO 253-G003 that undergoes periodic flares. Optical flares were first observed in 2014 by the All-Sky Automated Survey…
The Rapid X-ray and UV Evolution of ASASSN-14ko
Anna V. Payne, Benjamin J. Shappee, Jason T. Hinkle +13
ASASSN-14ko is a recently discovered periodically flaring transient at the center of the AGN ESO 253-G003 with a slowly decreasing period. Here we show that the flares originate fr…
Evidence for an Optical Low-frequency Quasi-Periodic Oscillation in the Kepler Light Curve of an Active Galaxy
Krista Lynne Smith, Richard F. Mushotzky, Patricia T. Boyd +1
We report evidence for a quasi-periodic oscillation (QPO) in the optical light curve of KIC 9650712, a narrow-line Seyfert 1 galaxy in the original Kepler field. After the developm…
The Kepler Light Curves of AGN: A Detailed Analysis
Krista Lynne Smith, Richard F. Mushotzky, Patricia T. Boyd +3
We present a comprehensive analysis of 21 light curves of Type 1 AGN from the Kepler spacecraft. First, we describe the necessity and development of a customized pipeline for treat…
KSwAGS: A Swift X-ray and UV Survey of the Kepler Field. I
Krista Lynne Smith, Patricia T. Boyd, Richard F. Mushotzky +6
We introduce the first phase of the Kepler-Swift Active Galaxies and Stars survey (KSwAGS), a simultaneous X-ray and UV survey of ~6 square degrees of the Kepler field using the Sw…