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searching gamma-ray bursts for gravitational lensing echoes - implications for compact dark matterThe first available 44 gamma-ray bursts (GRBs) detected by the Burst and Transient Source Experiment on board the Compton Gamma-Ray Observatory have been inspected for echo signals following shortly after the main signal. No significant echoes have been found. Echoes would have been expected were the GRBs distant enough and the universe populated with a sufficient density of compact objects composing the dark matter. Constraints on dark matter abundance and GRB redshifts from the present data are presented and discussed. Based on these preliminary results, a universe filled to critical density of compact objects between 10 exp 6.5 and 10 exp 8.1 solar masses are now marginally excluded, or the most likely cosmological distance paradigm for GRBs is not correct. We expect future constraints to be able either to test currently popular cosmological dark matter paradigms or to indicate that GRBs do not lie at cosmological distances.
Document ID
19930071232
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Nemiroff, R. J.
(Universities Space Research Association; NASA, Goddard Space Flight Center Greenbelt, MD, United States)
Norris, J. P.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Wickramasinghe, W. A. D. T.
(Pennsylvania Univ. Philadelphia, United States)
Horack, J. M.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Kouveliotou, C.
(Universities Space Research Association; NASA, Marshall Space Flight Center Huntsville, AL, United States)
Fishman, G. J.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Meegan, C. A.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Wilson, R. B.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Paciesas, W. S.
(NASA Marshall Space Flight Center; Huntsville Univ. AL, United States)
Date Acquired
August 16, 2013
Publication Date
September 1, 1993
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 414
Issue: 1
ISSN: 0004-637X
Subject Category
ASTROPHYSICS
Distribution Limits
Public
Copyright
Other