The design and construction of modulation collimators

Astronomy and Astrophysics – Astronomy

Scientific paper

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Collimators, Design Analysis, Fabrication, X Ray Astronomy, X Ray Spectroscopy, Angular Resolution, Balloon-Borne Instruments, Computerized Simulation, Crab Nebula, Fourier Analysis, High Resolution, Iterative Solution, Weighting Functions

Scientific paper

The modulation collimator, originally developed to estimate the size of an X-ray source (Sco X-1), is characterized by high angular resolution, wide aperture, and large brightness. The purpose of the paper is to discuss: (1) the synthesis of a two-dimensional image of the source from one-dimensional scans, (2) the achievement of an angular resolution higher than the FWHM of the transmission window of the collimator, and (3) the reconstruction of the source structure with one or more bigrid collimators. Design problems of modulation collimators are considered with reference to an X-ray experiment for the balloon observation of the Crab Nebula.

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