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journal id: "astrophysicalxjournal"
| Authors | A.J. van der Horst, C. Kouveliotou, N. Gehrels, E. Rol, R.A.M.J. Wijers, J.K. Cannizzo, J. Racusin, D.N. Burrows | | Title | Optical classification of gamma-ray bursts in the Swift era |
| Journal | Astrophysical Journal |
| Volume | 699 |
| Year | 2009 |
| Issue | 2 |
| Pages | 1087-1091 |
| ISSN | 0004637X |
| Faculty | Faculty of Science |
| Institute/dept. | FNWI: Astronomical Institute Anton Pannekoek (IAP) |
| Abstract | We propose a new method for the classification of optically dark gamma-ray bursts (GRBs), based on the X-ray and optical-to-X-ray spectral indices of GRB afterglows, and utilizing the spectral capabilities of Swift. This method depends less on model assumptions than previous methods, and can be used as a quick diagnostic tool to identify optically sub-luminous bursts. With this method we can also find GRBs that are extremely bright at optical wavelengths. We show that the previously suggested correlation between the optical darkness and the X-ray/gamma-ray brightness is merely an observational selection effect. |
| Document type | Article |
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