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Consistency of Hitomi, XMM-Newton, and Chandra 3.5 keV data from Perseus

Conlon, Joseph P.; Day, Francesca; Jennings, Nicholas +2 more

Hitomi observations of Perseus with the Soft X-ray Spectrometer (SXS) provide a high-resolution look at the 3.5 keV feature reported by multiple groups in the Perseus cluster. The Hitomi spectrum—which involves the sum of diffuse cluster emission and the pointlike central active galactic nucleus (AGN)—does not show any excess at E ∼3.5 keV , givin…