What is the pointing accuracy of Suzaku?
The pointing accuracy currently is about 1 arcmin or less. • What is the latest news on the attitude solution? In the data of processing v.1.2.2.3, the pointing error with a time scale longer than one satellite orbit is corrected and is reflected on the sky coordinate of each photon. However, there still remains 20″-50″ fluctuation of the pointing direction originating from thermal distortion of the spacecraft body. This latter point will further be investigated using v.1.2.2.3 data. • How large is the point-spread function of XRT? The Half Power Diameter (HPD) for XRT-I0, I1, I2 and I3 are 1.8 arcmin, 2.0 arcmin, 2.0 arcmin, and 2.3 arcmin, respectively. For more details, see Section 5.2.5 of the technical description. • How large is the effective area of one XRT? The effective area (including the detector efficiency) at launch was about 330 and 370 cm2 on the FI and BI at 1.5 keV. The detector efficiency has been decreasing due to the contamination accumulating on the optical blockin
