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Energetic X-ray Imaging Survey Telescope (EXIST)

Grindlay, J. E. and Prince, T. A. and Gehrels, N. and Tueller, J. and Hailey, C. J. and Ramsey, B. D. and Weisskopf, M. C. and Ubertini, P. and Skinner, G. K. (1995) Energetic X-ray Imaging Survey Telescope (EXIST). In: EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy VI. Proceedings of SPIE. No.2518. Society of Photo-optical Instrumentation Engineers , Bellingham, WA, pp. 202-210. ISBN 0-8194-1877-3.

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We have begun to study a mission to carry out the first high sensitivity imaging survey of the entire sky at hard x-ray energies (5-600 keV). The Energetic X-ray Imaging Survey Telescope (EXIST) would include 2-4 large area coded aperture telescopes with offset fields of view allowing total exposures of ≳500 ksec and flux sensitivities below 1 mCrab over the full sky in a year with time resolution from msec to months for each source as well as high spatial and spectral resolution for sources, transients and gamma-ray bursts. A pointed Observatory phase, with the telescopes co-aligned, would follow and achieve still greater sensitivities and temporal coverage, allowing the detailed study of virtually all classes of accretion sources (cataclysmic variables to quasars) as well as diffuse galactic emission. The baseline concept originally proposed for the detector is a modularized array (4 x 4) of Cd-Zn-Te crystals (6.25 cm^2 each, or 100 cm^2 /module). An array of 5 x 5 modules, or 2500 cm^2 total detector area with 1.25 mm spatial resolution, would constitute the focal plane readout of each of the 4 telescopes. A brief description of the proposed detector and telescopes and predicted backgrounds and sensitivity is given. An alternative detector concept, employing a hybrid (stacked) gas counter (2 atm Xe/TMA, optical avalanche chamber) and imaging phoswich scintillator (NaI/CsI), is also described and tradeoffs presented.

Item Type:Book Section
Related URLs:
URLURL TypeDescription DOIArticle
Grindlay, J. E.0000-0002-1323-5314
Prince, T. A.0000-0002-8850-3627
Additional Information:© 1995 SPIE. This Study is being supported by the NASA Mission Concepts program as well as individual instrumentation development grants to the investigators.
Group:Space Radiation Laboratory
Funding AgencyGrant Number
Subject Keywords:high energy astrophysics; x-ray/gamma-ray detectors; coded aperture imaging; satellite missions
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Space Radiation Laboratory1996-07
Series Name:Proceedings of SPIE
Issue or Number:2518
Record Number:CaltechAUTHORS:20140624-150116093
Persistent URL:
Official Citation:Jonathan E. Grindlay ; Thomas A. Prince ; Neil A. Gehrels ; Jack Tueller ; Charles J. Hailey, et al. "Energetic x-ray imaging survey telescope (EXIST)", Proc. SPIE 2518, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy VI, 202 (September 1, 1995); doi:10.1117/12.218377;
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:46490
Deposited By: Deborah Miles
Deposited On:25 Jun 2014 16:14
Last Modified:10 Nov 2021 17:26

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