Energy-Scale Calibration of the Suzaku X-Ray Imaging Spectrometer Using the Checker Flag Charge Injection Technique in Orbit

Kavli Affiliate: Gregory Prigozhin

| First 5 Authors: Midori Ozawa, Hideki Uchiyama, Hironori Matsumoto, Hiroshi Nakajima, Katsuji Koyama

| Summary:

The X-ray Imaging Spectrometer (XIS) on board the Suzaku satellite is an
X-ray CCD camera system that has superior performance such as a low background,
high quantum efficiency, and good energy resolution in the 0.2-12 keV band.
Because of the radiation damage in orbit, however, the charge transfer
inefficiency (CTI) has increased, and hence the energy scale and resolution of
the XIS has been degraded since the launch of July 2005. The CCD has a charge
injection structure, and the CTI of each column and the pulse-height dependence
of the CTI are precisely measured by a checker flag charge injection (CFCI)
technique. Our precise CTI correction improved the energy resolution from 230
eV to 190 eV at 5.9 keV in December 2006. This paper reports the CTI
measurements with the CFCI experiments in orbit. Using the CFCI results, we
have implemented the time-dependent energy scale and resolution to the Suzaku
calibration database.

| Search Query: ArXiv Query: search_query=au:”Gregory Prigozhin”&id_list=&start=0&max_results=10

Read More