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Title:
A Search for Highly Dispersed Radio Bursts in Parkes Survey Data
Authors:
Crawford, Fronefield, III; Moses, J.; Devour, B.; Roberts, M.
Affiliation:
AA(), AB(Franklin & Marshall College), AC(Franklin & Marshall College), AD(Franklin & Marshall College), AE(Eureka Scientific, Inc.)
Publication:
American Astronomical Society, AAS Meeting #214, #429.05; Bulletin of the American Astronomical Society, Vol. 41, p.700
Publication Date:
05/2009
Origin:
AAS
Bibliographic Code:
2009AAS...21442905C

Abstract

Recently an extremely luminous, highly dispersed millisecond radio burst of cosmological origin was discovered in a Parkes pulsar survey of the Magellanic Clouds. The burst was found in a re-analysis of the archive of the original survey observations, and this discovery has prompted a search for previously undetected highly dispersed bursts in other archival radio surveys. Pulsar survey observations are currently one of the few kinds of observations that have sufficient time and frequency resolution to be sensitive to such bursts. We have searched two Parkes pulsar survey data archives for highly dispersed bursts. Both surveys targeted unidentified gamma-ray sources from the 3rd EGRET catalog. 3016 beams from a survey of 56 unidentified midlatitude EGRET sources and 45 beams from search observations of four X-ray sources coincident with EGRET sources were searched. All of the observations were conducted near 1400 MHz, the frequency at which the previous burst was detected. Each beam was separately searched at trial dispersion measures ranging from zero to at least 1000 pc cm-3 to ensure that all reasonable dispersions were accounted for. We report on the results of these searches. This work was supported in part by grants from Research Corporation (CCSA) and the Mount Cuba Astronomical Foundation.
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