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Swift and NuSTAR observations of GW170817 : detection of a blue kilonova
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(2017) Swift and NuSTAR observations of GW170817 : detection of a blue kilonova. Science, 358 (6370). pp. 1565-1570. doi:10.1126/science.aap9580
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WRAP-Swift-NuSTAR-observations-GW170817-Levan-2017.pdf - Accepted Version - Requires a PDF viewer. Download (2367Kb) | Preview |
Official URL: http://dx.doi.org/10.1126/science.aap9580
Abstract
With the first direct detection of merging black holes in 2015, the era of gravitational wave (GW) astrophysics began. A complete picture of compact object mergers, however, requires the detection of an electromagnetic (EM) counterpart. We report ultraviolet (UV) and x-ray observations by Swift and the Nuclear Spectroscopic Telescope Array of the EM counterpart of the binary neutron star merger GW170817. The bright, rapidly fading UV emission indicates a high mass (≈0.03 solar masses) wind-driven outflow with moderate electron fraction (Ye ≈ 0.27). Combined with the x-ray limits, we favor an observer viewing angle of ≈30° away from the orbital rotation axis, which avoids both obscuration from the heaviest elements in the orbital plane and a direct view of any ultrarelativistic, highly collimated ejecta (a γ-ray burst afterglow).
| Item Type: | Journal Article | ||||||||||||||||||||||||||||||||||||
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| Subjects: | Q Science > QB Astronomy | ||||||||||||||||||||||||||||||||||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||||||||||||||||||||||||||||||
| Library of Congress Subject Headings (LCSH): | Neutron stars, Gravitational waves | ||||||||||||||||||||||||||||||||||||
| Journal or Publication Title: | Science | ||||||||||||||||||||||||||||||||||||
| Publisher: | American Association for the Advancement of Science | ||||||||||||||||||||||||||||||||||||
| ISSN: | 0036-8075 | ||||||||||||||||||||||||||||||||||||
| Official Date: | 22 December 2017 | ||||||||||||||||||||||||||||||||||||
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| Volume: | 358 | ||||||||||||||||||||||||||||||||||||
| Number: | 6370 | ||||||||||||||||||||||||||||||||||||
| Page Range: | pp. 1565-1570 | ||||||||||||||||||||||||||||||||||||
| DOI: | 10.1126/science.aap9580 | ||||||||||||||||||||||||||||||||||||
| Status: | Peer Reviewed | ||||||||||||||||||||||||||||||||||||
| Publication Status: | Published | ||||||||||||||||||||||||||||||||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||||||||||||||||||||||||||||||||
| RIOXX Funder/Project Grant: |
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