Sensitivity of X-Ray and Gamma-Ray Telescopes with Coded Apertures

Part of the Astrophysics and Space Science Library book series (ASSL, volume 268)


The sensitivity of a system with a coded aperture is defined as the ratio of the useful signal response to the root-mean-square value of the photon noise in the elements of the reconstructed image. There are three factors causing the noise:
  1. 1.

    the fact that the number of photons coming from the studied source is limited;

  2. 2.

    the contribution of photons from other sources in the field of view of the telescope;

  3. 3.

    the contribution of photons which hit the detector bypassing the coded mask.



Astronomy Letter Source Element Photon Noise Cyclic Difference Aperture Imaging 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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  1. 1.
    Fenimore, E. E. Coded aperture imaging: predicted performance of uniformly redundant arrays, Appl. Optics, 1978, 17, 3562.ADSCrossRefGoogle Scholar
  2. 2.
    Sodin, L. G. On the sensitivity of X-ray and gamma-ray telescopes with various types of coded apertures, Astronomy Letters, 1997, 23, 133.ADSGoogle Scholar
  3. 3.
    Ponman, T. J., Hammerslay, A. P. and Skinner, G. K. Error analysis for a noncyclic imaging system, Nucl. Instr. and Meth. in Phys. Res., 1987, A262, 419.ADSCrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media Dordrecht 2001

Authors and Affiliations

  1. 1.Institute of Radio Physics and ElectronicsNational Academy of Sciences of UkraineKharkovUkraine
  2. 2.Institute of Radio AstronomyNational Academy of Sciences of UkraineKharkovUkraine

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