A Caltech Library Service

The radio afterglow from the γ-ray burst of 8 May 1997

Frail, D. A. and Kulkarni, S. R. and Nicastro, L. and Feroci, M. and Taylor, G. B. (1997) The radio afterglow from the γ-ray burst of 8 May 1997. Nature, 389 (6648). pp. 261-263. ISSN 0028-0836. doi:10.1038/38451.

Full text is not posted in this repository. Consult Related URLs below.

Use this Persistent URL to link to this item:


Important insight into the nature of γ-ray bursts (GRBs) has been gained in recent months mainly due to the immediate, precise localization of the bursts and the discovery of relatively long-lived X-ray afterglows by the satellite BeppoSAX. These advances have enabled deep searches which have led to the discovery of optical transients coincident with fading X-ray sources. Optical spectroscopy of the latest burst (GRB970508; ref. 8) has clearly demonstrated that it lies at a cosmological distance, thus resolving a long-standing controversy about the distance scale to GRBs. Here we report a variable radio source within the error box of GRB970508 and coincident with the optical transient. We suggest that this is the much-sought-after radio counterpart of a GRB. If the observed fluctuations in the radio emission ('twinkling') are a result of a strong scattering by the irregularities in the ionized Galactic interstellar gas, then the source must have an angular size of about 3 microarcseconds in the first few weeks. The damping of the fluctuations with time indicates that the source expands to a significantly larger size later on.

Item Type:Article
Related URLs:
URLURL TypeDescription DOIArticle ReadCube access
Kulkarni, S. R.0000-0001-5390-8563
Taylor, G. B.0000-0001-6495-7731
Additional Information:© 1997 Macmillan Publishers Ltd. Received 8 August; accepted 28 August 1997. The VLA is a facility of the NSF operated under cooperative agreement by Associated Universities, Inc. D.A.F. and S.R.K. thank NRAO, and in particular B. Clark and M. Goss, for their support of the GRB programme. We thank R. Blandford and E. Waxman for discussions. S.R.K. is supported by the NSF and NASA.
Funding AgencyGrant Number
Issue or Number:6648
Record Number:CaltechAUTHORS:20130311-085438084
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:37431
Deposited By: Tony Diaz
Deposited On:13 Mar 2013 21:30
Last Modified:09 Nov 2021 23:28

Repository Staff Only: item control page