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26 April 2024 |
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Surveying the Hard X-ray Sky: Imaging in Space and Time | | Jonathan E. Grindlay
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1 Dec 1997 | | Subject: | astro-ph | | Abstract: | One of the few remaining astronomical bands (factor of $sim$10 in energy range) still without an all-sky imaging survey is the hard x-ray band (10-600 keV). This is in spite of sensitive imaging all-sky surveys already conducted at soft x-ray energies (0.2-2 keV; ROSAT) and soft/hard $gamma$-ray ($sim$750 keV - 10 GeV; COMPTEL/EGRET) energies and imminent for medium x-ray energies (2- 10 keV; ABRIXAS). A Hard x-ray imaging survey conducted with wide-field coded aperture telescopes allows both high sensitivity (and spatial/spectral resolution) and broad temporal coverage. We derive a generalized survey sensitivity/temporal parameter, Q, and compare previous and planned hard x-ray surveys with the proposed EXIST mission. Key scientific objectives that could be addressed with the enhanced capability of EXIST are outlined. | | Source: | arXiv, astro-ph/9712360 | | Services: | Forum | Review | PDF | Favorites | |
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