dc.contributor.author | Shivvers, I. | |
dc.contributor.author | Berger, Edo | |
dc.date.accessioned | 2017-02-22T20:58:46Z | |
dc.date.issued | 2011 | |
dc.identifier.citation | Shivvers, I., and E. Berger. 2011. A Beaming-Independent Estimate of the Energy Distribution of Long Gamma-Ray Bursts: Initial Results and Future Prospects. The Astrophysical Journal 734, no. 1: 58. doi:10.1088/0004-637x/734/1/58. | en_US |
dc.identifier.issn | 0004-637X | en_US |
dc.identifier.uri | http://nrs.harvard.edu/urn-3:HUL.InstRepos:30410834 | |
dc.description.abstract | We present single-epoch radio afterglow observations of 24 long-duration gamma-ray burst (GRB) on a timescale of & 100 d after the burst. These observations trace the afterglow evolution when the blastwave has decelerated to mildly- or non-relativistic velocities and has roughly isotropized. We infer beaming independent kinetic energies using the Sedov-Taylor self-similar solution, and find a median value for the sample of detected bursts of about 7 × 1051 erg, with a 90% confidence range of 1.1 × 1050 − 3.3 × 1053 erg. Both the median and 90% confidence range are somewhat larger than the results of multi-wavelength, multi-epoch afterglow modeling (including large beaming corrections), and the distribution of beaming-corrected γ-ray energies. This is due to bursts in our sample with only a single-frequency observation for which we can only determine an upper bound on the peak of the synchrotron spectrum. This limitation leads to a wider range of allowed energies than for bursts with a well-measured spectral peak. Our study indicates that single-epoch centimeter-band observations covering the spectral peak on a timescale of δt ∼ 1 yr can provide a robust estimate of the total kinetic energy distribution with a small investment of telescope time. The substantial increase in bandwidth of the EVLA (up to 8 GHz simultaneously with full coverage at 1 − 40 GHz) will provide the opportunity to estimate the kinetic energy distribution of GRBs with only a few hours of data per burst. | en_US |
dc.description.sponsorship | Astronomy | en_US |
dc.language.iso | en_US | en_US |
dc.publisher | IOP Publishing | en_US |
dc.relation.isversionof | doi:10.1088/0004-637x/734/1/58 | en_US |
dc.relation.hasversion | https://arxiv.org/abs/1101.0603 | en_US |
dash.license | OAP | |
dc.subject | gamma-rays: bursts | en_US |
dc.title | A Beaming-Independent Estimate of the Energy Distribution of Long Gamma-Ray Bursts: Initial Results and Future Prospects | en_US |
dc.type | Journal Article | en_US |
dc.description.version | Accepted Manuscript | en_US |
dc.relation.journal | The Astrophysical Journal | en_US |
dash.depositing.author | Berger, Edo | |
dc.date.available | 2017-02-22T20:58:46Z | |
dc.identifier.doi | 10.1088/0004-637x/734/1/58 | * |
dash.contributor.affiliated | Berger, Edo | |