APA
Click to copy
Aoki, Y., Ito, Y., Nobukawa, M., Kanemaru, Y., Miyazaki, K., Kusunoki, K., … Hiraga, J. (2023). Simulation Study of Pulse Height Difference Between Pixel Patterns of X-ray CCDs Onboard the XRISM Satellite. Pixel.
Chicago/Turabian
Click to copy
Aoki, Yuma, Yamato Ito, M. Nobukawa, Y. Kanemaru, Keitaro Miyazaki, Kohei Kusunoki, K. Mori, et al. “Simulation Study of Pulse Height Difference Between Pixel Patterns of X-Ray CCDs Onboard the XRISM Satellite.” Pixel (2023).
MLA
Click to copy
Aoki, Yuma, et al. “Simulation Study of Pulse Height Difference Between Pixel Patterns of X-Ray CCDs Onboard the XRISM Satellite.” Pixel, 2023.
BibTeX Click to copy
@article{yuma2023a,
title = {Simulation Study of Pulse Height Difference Between Pixel Patterns of X-ray CCDs Onboard the XRISM Satellite},
year = {2023},
journal = {Pixel},
author = {Aoki, Yuma and Ito, Yamato and Nobukawa, M. and Kanemaru, Y. and Miyazaki, Keitaro and Kusunoki, Kohei and Mori, K. and Yoneyama, T. and Tamba, T. and Tomida, H. and Nakajima, H. and Matsumoto, H. and Noda, H. and Hayashida, K. and Uchida, H. and Tanaka, Takaaki and Suzuki, Hiromasa and Yoshida, Tessei and Murakami, H. and Yamauchi, M. and Hatsukade, I. and Hagino, K. and Kohmura, T. and Uchiyama, H. and Yamaoka, K. and Ozaki, M. and Dotani, T. and Tsunemi, H. and Nobukawa, K. and Tsuru, T. and Kobayashi, S. and Hiraga, J.}
}
We have developed a soft X-ray telescope system Xtend onboard Japan’s new X-ray astronomical satellite XRISM. Xtend employs X-ray CCDs, which have basically the same design as those used in the previous X-ray astronomical satellite Hitomi. Monochromatic X-ray line spectra of the CCDs onboard Hitomi showed offsets of centroids between different pixel patterns or different good grades; the spectral centroids of charge-sharing events are higher than those of single-pixel events. The spectral offset, which we call “Goffset”, can cause large uncertainties in X-ray energy determination accuracy. In this paper, confirming the CCDs onboard XRISM also have Goffset, we performed a simulation study that takes into account the two factors; charge sharing and readout noise. Goffset of the flight model CCD is successfully reproduced by the simulation with a certain readout noise. We investigate how charge sharing and readout noise cause Goffset based on the simulation results.