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EXIST: mission design concept and technology program

Grindlay, Jonathan E. and Craig, William W. and Gehrels, Neil A. and Harrison, Fiona A. and Hong, J. (2003) EXIST: mission design concept and technology program. In: X-Ray and Gamma-Ray Telescopes and Instruments for Astronomy. Proceedings of SPIE. No.4851. Society of Photo-Optical Instrumentation Engineers , Bellingham, WA, pp. 331-344. ISBN 9780819446305.

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The Energetic X-ray Imaging Survey Telescope (EXIST) is a proposed very large area coded aperture telescope array, incorporting 8m^2 of pixelated Cd-Zn-Te (CZT) detectors, to conduct a full-sky imaging and temporal hard x-ray survey each 95min orbit. With a sensitivity of ~0.05mCrab, it will extend the ROSAT soft x-ray and proposed ROSITA medium x-ray surveys into the hard x-ray band and enable identifiaiton and study of sources ~10-20X fainter than with the ~15-100keV survey planned for the upcoming Swift mission. At ~100-600keV, the ~1mCrab sensitivity is 300X that achieved in the only previous all-sky survey. EXIST will address a broad range of key science objectives: from obscured AGN and surveys for black holes on all scales, which constrain the acretion history of the universe, to the highest sensitivity and resolution studies of gamma-ray bursts it will conduct as the Next Generation Gamma-Ray Burst mission. We summarize the science objectives and mission drivers, and the results of a mission design study for implementation as a free flyer mission, with Delta IV launch. Key issues affecting the telescope and detector design are discussed, and a summary of some of the current design concepts being studied in support of EXIST is presented for the wide-field but high resolutoin coded aperture imaging and very large area array of imaging CZT detectors. Overall mission design is summarized, and technology development needs and a development program are outlined which would enable the launch of EXIST by the end of the decade, as recommended by the NAS/NRC Decadal Survey.

Item Type:Book Section
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URLURL TypeDescription
Grindlay, Jonathan E.0000-0002-1323-5314
Harrison, Fiona A.0000-0003-2992-8024
Additional Information:© 2003 Society of Photo-Optical Instrumentation Engineers (SPIE). We thank the EXIST Science Working Group (see for input on the mission science and goals, S. Barthelmy, A. Parsons, C. Hailey and G. Fishman for technical assistance in the ISAL and IMDC mission studies at GSFC, R. Carter and S. DePaolo for management of the mission study at GSFC, T. Narita, J. Jenkins and W. Cook for detector and readout design discussions, and T. Decker and R. Hill for mechanical design assistance. This work was supported in part by NASA SR&T grant NAG5-5729 and support from NASA HQ for the design studies at GSFC is gratefully acknowledged.
Group:Space Radiation Laboratory
Funding AgencyGrant Number
Subject Keywords:EXIST, hard x-ray surveys, black holes, gamma-ray bursts, coded aperture imaging, hard x-ray imaging detectors, CZT arrays
Series Name:Proceedings of SPIE
Issue or Number:4851
Record Number:CaltechAUTHORS:20180109-145928633
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Official Citation:Jonathan E. Grindlay, William W. Craig, Neil A. Gehrels, Fiona A. Harrison, J. Hong, "EXIST: mission design concept and technology program", Proc. SPIE 4851, X-Ray and Gamma-Ray Telescopes and Instruments for Astronomy, (11 March 2003); doi: 10.1117/12.461470;
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:84199
Deposited By: George Porter
Deposited On:09 Jan 2018 23:11
Last Modified:15 Nov 2021 20:17

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