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Observational Facilities

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Black Holes: A Laboratory for Testing Strong Gravity

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Abstract

The chapter briefly reviews X-ray missions and gravitational wave experiments.

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Notes

  1. 1.

    Pile-up occurs in the case of bright sources, when two or more photons are detected as a single event. This clearly causes a distortion in the observed spectrum. For example, the CCD detectors on board of XMM-Newton and Chandra suffer pile-up in the case of bright X-ray binaries, while NuSTAR does not. There are specific procedures to fix the problem of pile-up in an observation, but this inevitably causes a loss of information.

  2. 2.

    The unfolded spectrum is the spectrum obtained by inverting Eq. (5.4). Equation (5.4) cannot be inverted in general, but one can invert this equation under some assumptions/simplifications, and the result is the unfolded spectrum.

  3. 3.

    One has to remove the effect due to the relative acceleration between us and the pulsar caused by the differential rotation of the Galaxy.

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Author information

Authors and Affiliations

  1. Department of Physics, Fudan University, Shanghai, China

    Cosimo Bambi

  2. Theoretical Astrophysics, Eberhard-Karls Universität Tübingen, Tübingen, Germany

    Cosimo Bambi

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  1. Cosimo Bambi
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Correspondence to Cosimo Bambi .

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Bambi, C. (2017). Observational Facilities. In: Black Holes: A Laboratory for Testing Strong Gravity. Springer, Singapore. https://doi.org/10.1007/978-981-10-4524-0_5

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