|
| | | | |
| | | |
| Stat |
Members: 3645
Articles: 2'501'711
Articles rated: 2609
20 April 2024 |
|
| | | | |
|
Article overview
| |
|
|
The Wide-Field Imaging Interferometry Testbed I: Purpose, Testbed Design, Data, and Synthesis Algorithms | | D. Leisawitz
; B.J. Frey
; D.B. Leviton
; A.J. Martino
; W.L. Maynard
; L.G. Mundy
; S.A. Rinehart
; S.H. Teng
; X. Zhang
; | | Date: |
30 Sep 2002 | | Subject: | astro-ph | | Affiliation: | 1,3), S.H. Teng , and X. Zhang ( NASA GSFC, Dept. Astronomy, Univ. Maryland, NRC Research Assoc., SSAI | | Abstract: | The Wide-field Imaging Interferometry Testbed (WIIT) was designed to validate, experiment with, and refine the technique of wide field mosaic imaging for optical/IR interferometers. Here we offer motivation for WIIT, present the testbed design, and describe algorithms that can be used to reduce the data from a spatial and spectral Michelson interferometer. A conventional single-detector Michelson interferometer operating with narrow bandwidth at center wavelength lambda is limited in its field of view to the primary beam of the individual telescope apertures, or ~lambda/d radians, where d is the telescope diameter. Such a field is too small for many applications; often one wishes to image extended sources. We are developing and testing techniques analogous to the mosaicing method employed in millimeter and radio astronomy, but applicable to optical/IR Michelson interferometers, in which beam combination is done in the pupil plane. An Npix x Npix array detector placed in the image plane of the interferometer is used to record simultaneously the fringe patterns from many contiguous telescope fields, effectively multiplying the field size by Npix/2, where the factor 2 allows for Nyquist sampling. This technique will be especially valuable for interferometric space observatories, such as the Space Infrared Interferometric Telescope (SPIRIT) and the Submillimeter Probe of the Evolution of Cosmic Structure (SPECS). SPIRIT and SPECS will be designed to provide sensitive, high angular resolution, far-IR/submillimeter observations of fields several arcminutes in diameter, and views of the universe complementary to those provided by the Hubble Space Telescope (HST), the Next-Generation Space Telescope (NGST), and the Atacama Large Millimeter Array (ALMA). | | Source: | arXiv, astro-ph/0210005 | | Services: | Forum | Review | PDF | Favorites | |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
|
| |
|
|
|
|
News, job offers and information for researchers and scientists:
| |
REGISTER