Slit aperture for the monitoring x-ray experiment

James C. Lochner; William C. Priedhorsky

doi:10.1117/12.51258

1 January 1992 Slit aperture for the monitoring x-ray experiment

James C. Lochner, William C. Priedhorsky

Proceedings Volume 1546, Multilayer and Grazing Incidence X-Ray/EUV Optics; (1992) https://doi.org/10.1117/12.51258
Event: San Diego, '91, 1991, San Diego, CA, United States

Abstract

We have investigated a slit aperture as an alternative to the square pinhole aperture for the MOXE detectors, which are to be put on the Soviet satellite Spectrum X-Gamma. A slit offers advantages for better discrimination of sources in crowded regions, eliminates the need for support structures for the aperture window, and does not compromise the signal-to-noise ratio (S/N) of a point source. We find that in a single 24 hr pointing of the satellite, MOXE can determine the position of a 10 mCrab source to better than 0.5 degrees with the slit. The structure of a titanium grate which supports the detector''s beryllium window constrains the slit to be 0.5 cm x 2.56 cm, oriented at an angle of 26.6 degrees to either side of the center lines of the detector. We illustrate an arrangement of the slits on each of the six detectors which optimizes source localization for a number of pointings.

Citation Download Citation

James C. Lochner and William C. Priedhorsky "Slit aperture for the monitoring x-ray experiment", Proc. SPIE 1546, Multilayer and Grazing Incidence X-Ray/EUV Optics, (1 January 1992); https://doi.org/10.1117/12.51258

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