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CDIM: Cosmic Dawn Intensity Mapper Final Report

Cooray, Asantha and Chang, Tzu-Ching and Unwin, Stephen and Zemcov, Michael and Coffey, Andrew and Morrissey, Patrick and Raouf, Nasrat and Lipscy, Sarah and Shannon, Mark and Wu, Gordon and Cen, Renyue and Chary, Ranga Ram and Doré, Olivier and Fan, Xiaohui and Fazio, Giovanni G. and Finkelstein, Steven L. and Heneka, Caroline and Lee, Bomee and Linden, Philip and Nayyeri, Hooshang and Rhodes, Jason and Sadoun, Raphael and Silva, Marta B. and Trac, Hy and Wu, Hao-Yi and Zheng, Zheng (2019) CDIM: Cosmic Dawn Intensity Mapper Final Report. . (Unpublished)

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The Cosmic Dawn Intensity Mapper (CDIM) will transform our understanding of the era of reionization when the Universe formed the first stars and galaxies, and UV photons ionized the neutral medium. CDIM goes beyond the capabilities of upcoming facilities by carrying out wide area spectro-imaging surveys, providing redshifts of galaxies and quasars during reionization as well as spectral lines that carry crucial information on their physical properties. CDIM will make use of unprecedented sensitivity to surface brightness to measure the intensity fluctuations of reionization on large-scales to provide a valuable and complementary dataset to 21-cm experiments. The baseline mission concept is an 83-cm infrared telescope equipped with a focal plane of 24 x 2048^2 detectors capable of R = 300 spectro-imaging observations over the wavelength range of 0.75 to 7.5 µm using Linear Variable Filters (LVFs). CDIM provides a large field of view of 7.8 deg^2 allowing efficient wide area surveys, and instead of moving instrumental components, spectroscopic mapping is obtained through a shift-and-stare strategy through spacecraft operations. CDIM design and capabilities focus on the needs of detecting faint galaxies and quasars during reionization and intensity fluctuation measurements of key spectral lines, including Lyman-α and Hα radiation from the first stars and galaxies. The design is low risk, carries significant science and engineering margins, and makes use of technologies with high technical readiness level for space observations.

Item Type:Report or Paper (Discussion Paper)
Related URLs:
URLURL TypeDescription Paper
Cooray, Asantha0000-0002-3892-0190
Zemcov, Michael0000-0001-8253-1451
Morrissey, Patrick0000-0001-8177-1023
Chary, Ranga Ram0000-0001-7583-0621
Doré, Olivier0000-0002-5009-7563
Fan, Xiaohui0000-0003-3310-0131
Fazio, Giovanni G.0000-0002-0670-0708
Finkelstein, Steven L.0000-0001-8519-1130
Lee, Bomee0000-0003-1954-5046
Nayyeri, Hooshang0000-0001-8242-9983
Rhodes, Jason0000-0002-4485-8549
Silva, Marta B.0000-0003-0209-4816
Additional Information:This research was funded by a NASA grant NNX17AJ80G to the University of California, Irvine. Part of this research was done by the Jet Propulsion Laboratory, California Institute of Technology, under a contract with NASA, and by Ball Aerospace & Technologies Corp. The CDIM team gratefully acknowledges the many members of the astronomical community who contributed their time and expertise in developing this concept and science case. The information presented about the CDIM mission concept is pre-decisional and is provided for planning and discussion purposes only. Cost information contained in this document is of a budgetary and planning nature and is intended for informational purposes only. It does not constitute a commitment on the part of JPL and/or Caltech.
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
Ball Aerospace CorporationUNSPECIFIED
Record Number:CaltechAUTHORS:20190925-100704816
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:98849
Deposited By: Tony Diaz
Deposited On:25 Sep 2019 17:17
Last Modified:09 Mar 2020 13:18

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