In-Orbit Timing Calibration of the Hard X-Ray Detector on Board Suzaku
Dotani, Tadayasu; Enoto, Teruaki; Yamaoka, Kazutaka; Fukazawa, Yasushi; Kamae, Tsuneyoshi; Kokubun, Motohide; Makishima, Kazuo; Murakami, Toshio; Nakazawa, Kazuhiro; Takahashi, Tadayuki; Tashiro, Makoto S.; Terada, Yukikatsu; Ueda, Yoshihiro; Ebisawa, Ken; Takahashi, Hiromitsu; Kawaharada, Madoka; Yonetoku, Daisuke; Ishisaki, Yoshitaka; Mizuno, Tsunefumi; Ozaki, Masanobu; Tamagawa, Toru; Watanabe, Shin; Miyawaki, Ryouhei; Kuroda, Yoshikatsu; Masukawa, Kazunori; Kuiper, Lucien; Endo, Manabu; Nakajima, Atsushi; Nomach, Masaharu; Shibayama, Naoki; Yamaguchi, Makio
Japan, Netherlands, United States
Abstract
The hard X-ray detector (HXD) aboard the X-ray satellite Suzaku is designed to have a good timing capability with a 61μs time resolution. In addition to detailed descriptions of the HXD timing system, results of in-orbit timing calibration and the performance of the HXD are summarized. The relative accuracy of time measurements of the HXD event was confirmed to have an accuracy of 1.9 × 10-9 ss- per day, and the absolute timing was confirmed to be accurate to 360μs or better. The results were achieved mainly through observations of the Crab pulsar, including simultaneous ones with RXTE, INTEGRAL, and Swift.