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Title: A METHOD TO IMPROVE THE SENSITIVITY OF RADIO TELESCOPES

As an extension of the ideas of Hanbury-Brown and Twiss, a method is proposed to eliminate the phase noise of white chaotic light in the regime where it is dominant, and to measure the much smaller Poisson fluctuations from which the incoming flux can be reconstructed. The best effect is achieved when the timing resolution is finer than the inverse bandwidth of the spectral filter. There may be applications to radio astronomy at the phase noise dominated frequencies of 1-10 GHz, in terms of potentially increasing the sensitivity of telescopes by an order of magnitude.
Authors:
;  [1] ;  [2]
  1. Department of Physics, University of Alabama, Huntsville, AL 35899 (United States)
  2. Blackett Laboratory, Imperial College, London SW7 2AZ (United Kingdom)
Publication Date:
OSTI Identifier:
22364691
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 798; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ASTRONOMY; ASTROPHYSICS; CHAOS THEORY; FILTERS; FLUCTUATIONS; GHZ RANGE; NOISE; POTENTIALS; RADIO TELESCOPES; RESOLUTION; SENSITIVITY; VISIBLE RADIATION