Position and parallax of the gamma-ray burst of 8 May 1997
Article Abstract:
The detection of a radio counterpart in the gamma-ray burst (GRB) of May 8 1997 has enabled astronomers to apply the technique of very long baseline interferometry (VLBI) to the GRB. The results obtained are consistent with those predicted by cosmological models. The VLBI monitoring of radio counterpart VLA JO65349.4 + 791619, at 8 to 25 days after the GRB, shows the radio emission to be very compact. The angular extent is under 1 milliarcsecond. The astronomers reveal the mean position of the radio counterpart and estimate its proper motion and annual parallax.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1997
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An outburst of relativistic particles from the soft gamma-ray repeater SGR1900+14
Article Abstract:
High-energy photons occur from soft gamma-ray repeaters (SGRs), with brief emissions believed to arise from young highly magnetized neutron stars. A fading radio source in the X-ray error box of SGR1900+14 has been discovered and it is suggested that it is a short-lived cloud of ionized gas, energized by relativistic particles. The energy released is constrained in the form of particles ejected during an energetic burst of gamma-rays.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1999
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