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New Measurement of the Vertical Atmospheric Density Profile From Occultations of the Crab Nebula With X Ray Astronomy Satellites Suzaku and Hitomi
Katsuda, Satoru; Sato, Kosuke; Tashiro, Makoto S. +6 more
We present new measurements of the vertical density profile of the Earth's atmosphere at altitudes between 70 and 200 km, based on Earth occultations of the Crab Nebula observed with the X ray Imaging Spectrometer onboard Suzaku and the hard X ray Imager onboard Hitomi. X ray spectral variation due to the atmospheric absorption is used to derive t…
Probing the circumnuclear environment of NGC 1275 with high-resolution X-ray spectroscopy
Fabian, Andrew C.; Fukazawa, Yasushi; Veilleux, Sylvain +6 more
NGC 1275 is the brightest cluster galaxy (BCG) in the Perseus cluster and hosts the active galactic nucleus (AGN) that is heating the central 100 kpc of the intracluster medium atmosphere via a regulated feedback loop. Here, we use a deep (490 ks) Cycle-19 Chandra High-Energy Transmission Grating (HETG) observation of NGC 1275 to study the anatomy…