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Evidence for a Compact Object in the Aftermath of the Extra-Galactic Transient AT2018cow
Dheeraj R. Pasham, Wynn C. G. Ho, William Alston +16
The brightest Fast Blue Optical Transients (FBOTs) are mysterious extragalactic explosions that may represent a new class of astrophysical phenomena. Their fast time to maximum bri…
On the impact of an intermediate duration X-ray burst on the accretion environment in IGR J17062-6143
Peter Bult, Diego Altamirano, Zaven Arzoumanian +10
We report on a spectroscopic analysis of the X-ray emission from IGR J17062-6143 in the aftermath of its June 2020 intermediate duration Type I X-ray burst. Using the Neutron Star…
The Spin and Orientation of the Black Hole in XTE J1908094
Paul A. Draghis, Jon M. Miller, Abderahmen Zoghbi +3
NuSTAR observed the black hole candidate XTE J1908094 during its 2013 and 2019 outbursts. We use relativistic reflection to measure the spin of the black hole through 19 differe…
On Synthetic Absorption Line Profiles of Thermally Driven Winds from Active Galactic Nuclei
Shalini Ganguly, Daniel Proga, Tim Waters +7
The warm absorbers observed in more than half of all nearby active galactic nuclei (AGN) are tracers of ionized outflows located at parsec scale distances from the central engine.…
Eclipsing the X-ray emitting region in the active galaxy NGC 6814
Luigi C. Gallo, Adam G. Gonzalez, Jon M. Miller
We report the detection of a rapid occultation event in the nearby Seyfert galaxy NGC 6814, simultaneously captured in a transient light curve and spectral variability. The intensi…