Development of a Raytrace Model for IXO

Details Development of a Raytrace Model for IXO Development of a Raytrace Model for IXO

Feb 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010head...11.4008d&link_type=abstract

American Astronomical Society, HEAD meeting #11, #40.08; Bulletin of the American Astronomical Society, Vol. 41, p.721

Computer Science

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The International X-ray Observatory (IXO) will feature an X-ray Grating Spectrometer (XGS) for the 0.1 - 1.0 keV band where it is expected to have an effective area exceeding 1000 cm2 and a spectral resolution of 3000 or more. One of the proposed designs for the XGS is the critical angle transmission grating spectrometer (CATGS). As part of the CATGS design process, we are developing a raytrace program that will be used to optimize the spectrometer and to realistically assess that the desired spectral resolution can be achieved. Moreover, the raytrace will help us evaluate the impact of different categories of mirror imperfections and blur sources upon the resolution of the spectrometer. The raytrace is based upon MARX, which is used to simulate the on-orbit performance of Chandra X-Ray Observatory. As such, it will be capable of simulating the response of the observatory to a variety of astrophysical sources. Like MARX, we expect this raytrace to be useful throughout the life of the mission, including for the design and calibration of the observatory, the production of input data products for development of the various software pipelines, and for observer proposal planning. Here we report on the development status of the raytrace and provide an update on the design of the CATGS.

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