A fast radio burst in the direction of the Carina dwarf spheroidal galaxy
- Creators
- Ravi, V.
- Shannon, R. M.
- Jameson, A.
Abstract
We report the real-time discovery of a fast radio burst (FRB 131104) with the Parkes radio telescope in a targeted observation of the Carina dwarf spheroidal galaxy. The dispersion measure of the burst is 779 cm^(–3) pc, exceeding predictions for the maximum line-of-sight Galactic contribution by a factor of 11. The temporal structure of the burst is characterized by an exponential scattering tail with a timescale of 2.0^(+0.8)_(−0.5) ms at 1582 MHz that scales as frequency to the power –4.4^(+1.6)_(−1.8) (all uncertainties represent 95% confidence intervals). We bound the intrinsic pulse width to be <0.64 ms due to dispersion smearing across a single spectrometer channel. Searches in 78 hr of follow-up observations with the Parkes telescope reveal no additional sporadic emission and no evidence for associated periodic radio emission. We hypothesize that the burst is associated with the Carina dwarf galaxy. Follow-up observations at other wavelengths are necessary to test this hypothesis.
Additional Information
© 2015 The American Astronomical Society. Received 2014 October 28; accepted 2014 December 4; published 2015 January 14. We thank M. Bailes and E. Petroff for useful discussions, and the Swinburne pulsar group for making their real-time single pulse detector available for this experiment. We also thank the Parkes Observatory staff for hospitality during our visits. The Parkes Radio Telescope is part of the Australia Telescope, which is funded by the Commonwealth of Australia for operation as a National Facility by CSIRO. We acknowledge the use of NASA's SkyView facility (http://skyview.gsfc.nasa.gov) located at NASA Goddard Space Flight Center. This work was performed on the gSTAR national facility at Swinburne University of Technology. gStar is funded by Swinburne and the Australian Government's Education Investment Fund.Attached Files
Published - Ravi_2015_ApJL_799_L5.pdf
Accepted Version - 1412.1599.pdf
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Additional details
- Eprint ID
- 96614
- Resolver ID
- CaltechAUTHORS:20190620-161506259
- Commonwealth of Australia
- Swinburne University of Technology
- Created
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2019-06-21Created from EPrint's datestamp field
- Updated
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2021-11-16Created from EPrint's last_modified field