Question ID = 0085
Question ID = 0085
Assigned Member (担当者)2007-11-27 M.SuzukiName and Institute (質問者/機関)Lindsay Rocks (University of Wisconsin)Question (質問)I wanted to make a plot to show the low energy sensitivity of the BI CCD (XIS1) compared to a FI CCD (XIS0). I plotted the SPECRESP column of the ARF I had made with xissimarfgen for the bulge3 observation and found that the XIS1 effective area looks to be less than the XIS0 effective area. I tried dividing the SPECRESP column by the CONTAMI_TRANSMIS colum to take out the effect of the contamination, but then the effective areas for the two detectors look nearly identical across the energy range. How can the BI CCD have the same sensitivity as the FI CCD at low energies? I have attached the ARF's I made so that you can see the versions if you like.Answer from(回答の文責)Suzaku help deskAnswer (答え)The XIS ARF file contains the effect of the contamination on the optical blocking filter (OBF) as well as the effective area of the telescope, while the XIS RMF file takes the response and the efficiency of the CCD, and the transmissivity of the OBF into account. This means that the difference of the FI and the BI CCD is considered in the RMF, not in the ARF. Please refer to Fig.1 in Ishisaki et al. 2007, PASJ, 59, S113 (Suzaku Special Issue).Status （詳細なステータス）2007-11-27 Accept2007-12-04 Done 
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