Observatory conceptual development for the Joint Dark Energy Mission

Michael J. Sholl; Gary M. Bernstein; David A. Content; Michael G. Dittman; Joseph M. Howard; Michael L. Lampton; John P. Lehan; J. Eric Mentzell; Robert A. Woodruff

doi:10.1117/12.828116

26 August 2009 Observatory conceptual development for the Joint Dark Energy Mission

Michael J. Sholl, Gary M. Bernstein, David A. Content, Michael G. Dittman, Joseph M. Howard, Michael L. Lampton, John P. Lehan, J. Eric Mentzell, Robert A. Woodruff

Author Affiliations +

Proceedings Volume 7436, UV/Optical/IR Space Telescopes: Innovative Technologies and Concepts IV; 743603 (2009) https://doi.org/10.1117/12.828116
Event: SPIE Optical Engineering + Applications, 2009, San Diego, California, United States

Abstract

The Joint Dark Energy Mission (JDEM)^1,2 is a proposed dark energy space mission that will measure the expansion history of the universe and the growth of its large scale structure. It is intended to provide tight constraints on the equation of state of the universe and test the validity of general relativity. Three complementary observational analyses will be employed: Baryon Acoustic Oscillations, Type 1a Supernovae and Gravitational Weak Lensing. An observatory designed for efficient accommodation of these techniques combines wide-field, diffraction-limited observations, ultra-stable point spread function, and spectroscopy. In this paper we discuss optical configurations capable of simultaneous wide-field imaging and spectroscopy, using either afocal or focal telescope configurations. Spectroscopy may be performed by an integral field unit (IFU), grism or prism spectrometer. We present a flowdown of weak lensing image stability requirements (the most demanding technique optically) to telescope thermo-mechanical stability limits, based on variations in the optical transfer function of combinations of Zernike modes, and the sensitivity of these mode combinations to thermo-mechanical drift of the telescope. We apply our formalism to a representative threemirror anastigmat telescope and find quantitative relations between the second moments of the image and the required stability of the telescope over a typical weak lensing observation.

Citation Download Citation

Michael J. Sholl, Gary M. Bernstein, David A. Content, Michael G. Dittman, Joseph M. Howard, Michael L. Lampton, John P. Lehan, J. Eric Mentzell, and Robert A. Woodruff "Observatory conceptual development for the Joint Dark Energy Mission", Proc. SPIE 7436, UV/Optical/IR Space Telescopes: Innovative Technologies and Concepts IV, 743603 (26 August 2009); https://doi.org/10.1117/12.828116

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available