Paper 13093-227
Paper 13093-227
Pile-up simulator for XRISM/Xtend
19 June 2024 • 17:30 - 19:00 Japan Standard Time | Room G5, North - 1F
Abstract
In X-ray astronomy, multi-pixel photon-counting devices are utilized to observe X-ray radiation from astronomical objects. When the photon-counting devices observe bright sources, they generally suffer from pile-up, which leads to mistakes in the observational properties of the source: hardening in the X-ray spectrum and apparent decrease in flux. X-Ray Imaging and Spectroscopy Mission (XRISM) equipes an X-ray telescopes “Xtend”, whose focal plane detector is a CCD camera with a wide field-of-view of 38 arcmin square. We develop the pile-up simulator for Xtend to provide a quantitative assessment of pile-up according to the fluxes of objects. The simulator is based on Monte-Carlo simulation utilizing GEANT4. In this paper, we report a development of the pile-up simulator, its application, and the anticipated effects of pile-up for Xtend.
Presenter
Tomokage Yoneyama
Chuo Univ. (Japan)
Tomokage Yoneyama received his BS and MS degrees in physics and his PhD in science from Osaka University in 2016, 2018, and 2021, respectively. He was an Aerospace Project Research Associate at Japan Aerospace Exploration Agency (JAXA), and now is an assistant professor at Department of Physics, Faculty of Science and Engineering, Chuo University. He is a member of the Xtend instrument team and the science operations team of the X-Ray Imaging and Spectroscopy Mission (XRISM) project and has been involved in the development of Xtend, the soft X-ray imaging telescope.