A new fast radio burst in the datasets containing the Lorimer burst

Abstract

We report the discovery of a new fast radio burst (FRB), FRB~010312, in archival data from a 1.4\,GHz survey of the Magellanic Clouds using the multibeam receiver on the Parkes 64\,m-diameter radio telescope. These data sets include the Lorimer burst (FRB~010724), which it pre-dates and which we also re-detect. The new burst has a much higher dispersion measure of 1187\,cm${}^{-3}$pc. The burst is one of the broadest found to date, the second earliest FRB known, and the ninth FRB discovered with a dispersion measure larger than 1000\,cm${}^{-3}$pc. Our discovery indicates that there are likely to be more burst events still to be found in the existing Parkes data archive.

4 pages, 1 figure, 1 table. Accepted for publication in MNRAS Letters