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X-ray and UV Monitoring of the Seyfert 1.5 Galaxy Markarian 817
A. M. Morales, J. M. Miller, E. M. Cackett +2
We report the results of long-term simultaneous X-ray and UV monitoring of the nearby (z=0.03145) Seyfert 1.5 galaxy Mrk 817 using the Neil Gehrels Swift Observatory XRT and UVOT.…
Detection of polarized gamma-ray emission from the Crab nebula with Hitomi Soft Gamma-ray Detector
Hitomi Collaboration, Felix Aharonian, Hiroki Akamatsu +191
We present the results from the Hitomi Soft Gamma-ray Detector (SGD) observation of the Crab nebula. The main part of SGD is a Compton camera, which in addition to being a spectrom…
NICER Discovers mHz Oscillations in the "Clocked" Burster GS 1826-238
Tod E. Strohmayer, Keith C. Gendreau, Diego Altamirano +12
We report the discovery with the Neutron Star Interior Composition Explorer (NICER) of mHz X-ray brightness oscillations from the "clocked burster." NICER observed the source in th…
The Athena X-ray Integral Field Unit
Didier Barret, Thien Lam Trong, Jan-Willem den Herder +100
The X-ray Integral Field Unit (X-IFU) is the high resolution X-ray spectrometer of the ESA Athena X-ray observatory. Over a field of view of 5' equivalent diameter, it will deliver…
Constraining the inclination of the Low-Mass X-ray Binary Cen X-4
Erica K. Hammerstein, Edward M. Cackett, Mark T. Reynolds +1
We present the results of ellipsoidal light curve modeling of the low mass X-ray binary Cen X-4 in order to constrain the inclination of the system and mass of the neutron star. Ne…
A NICER look at the Aql X-1 hard state
Peter Bult, Zaven Arzoumanian, Edward M. Cackett +16
We report on a spectral-timing analysis of the neutron star low-mass X-ray binary Aql~X-1 with the Neutron Star Interior Composition Explorer (NICER) on the International Space Sta…