Laura Brenneman

TL;DR: In this article, principal component analysis (PCA) was used to identify at least 12 qualitatively different patterns of spectral variability, involving several different mechanisms, including five sources which show evidence of variable relativistic reflection (MCG-6-30-15, NGC 4051, 1H 0707−495, nGC 3516 and Mrk 766).

TL;DR: In this paper, the authors analyzed data from three deep Suzaku observations of NGC 1365 and found that, in addition to the power-law continuum and absorption from ionized gas seen in most AGN, inner disk reflection and variable absorption from neutral gas within the Broad Emission Line Region are both necessary components in all three observations.

TL;DR: The attitude and orbit control system were improved in hardware and software, and the number of star sensors were increased from two to three to improve coverage and robustness in onboard attitude determination and to obtain a wider field of view sun sensor.

TL;DR: In this article, the authors present an analysis of a ~160 ks NuSTAR observation of the nearby bright Seyfert galaxy IC 4329A using standard Comptonization models, and measure both physical properties independently using the best signal to noise obtained to date in an active galactic nucleus over the 3-79 keV band.

TL;DR: In this article, the authors review the state-of-the-art in relativistic reflection modeling, listing assumptions and simplifications that may affect the final measurements and may be investigated better in the future.