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An outburst of relativistic particles from the soft big γ-ray repeater SGR1900+14

Frail, D. A. and Kulkarni, S. R. and Bloom, J. S. (1999) An outburst of relativistic particles from the soft big γ-ray repeater SGR1900+14. Nature, 398 (6723). pp. 127-129. ISSN 0028-0836. doi:10.1038/18163.

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Soft γ-ray repeaters (SGRs) are transient sources of high-energy photons, whose brief emissions are thought to arise from young and highly magnetized neutron stars. The exact cause of these outbursts, and the nature of the energy-loss mechanism that powers them, remain unknown. Here we report the discovery of a fading radio source within the X-ray error box of SGR1900+14. We argue that the radio source is a short-lived cloud of ionized gas, powered by relativistic particles ejected at the time of the intense burst of high-energy photons in late August 1998 (this period of activity also included an extremely energetic burst of γ-rays on 27 August). As the radio photons are not beamed, our observations allow us to constrain the energy released in the form of particles ejected during the burst. Moreover, the astrometrical precision of radio observations enable us to determine the exact position of the source to very high accuracy.

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URLURL TypeDescription ReadCube access
Kulkarni, S. R.0000-0001-5390-8563
Bloom, J. S.0000-0002-7777-216X
Additional Information:© 1999 Macmillan Magazines Ltd. Received 28 October; accepted 21 December 1998. The National Radio Astronomy Observatory is a facility of the NSF operated under cooperative agreement by Associated Universities, Inc. D.A.F. thanks C. Thompson and M. Goss for discussions. We thank B. Clark and M. Goss for their long-term support in the search for SGR1900+14. S.R.K. is supported by the NSF and NASA.
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Issue or Number:6723
Record Number:CaltechAUTHORS:20150519-075051837
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:57631
Deposited By: Tony Diaz
Deposited On:19 May 2015 18:51
Last Modified:10 Nov 2021 21:52

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