Constraining the energy budget of GRB 080721
We follow the bright, highly energetic afterglow of Swift-discovered GRB 080721 at z= 2.591 out to 36 d or 3 × 10(6) s since the trigger in the optical and X-ray bands. We do not detect a break in the late-time light curve inferring a limit on the opening angle of [graphic] and setting tight constra...
| Main Authors: | , , , , , , , , , , , , , , , , , , , |
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| Format: | Journal Article |
| Published: |
Oxford University Press
2009
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| Online Access: | http://hdl.handle.net/20.500.11937/35469 |
| _version_ | 1848754505311584256 |
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| author | Starling, R. Rol, E. van der Horst, A. Yoon, S. Palshin, V. Ledoux, C. Page, K. Fynbo, J. Wiersema, K. Tanvir, N. Jakobsson, P. Guidorzi, C. Curran, Peter Levan, A. O’Brien, P. Osborne, J. Svinkin, D. de Ugarte Postigo, A. Oosting, T. Howarth, I. |
| author_facet | Starling, R. Rol, E. van der Horst, A. Yoon, S. Palshin, V. Ledoux, C. Page, K. Fynbo, J. Wiersema, K. Tanvir, N. Jakobsson, P. Guidorzi, C. Curran, Peter Levan, A. O’Brien, P. Osborne, J. Svinkin, D. de Ugarte Postigo, A. Oosting, T. Howarth, I. |
| author_sort | Starling, R. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | We follow the bright, highly energetic afterglow of Swift-discovered GRB 080721 at z= 2.591 out to 36 d or 3 × 10(6) s since the trigger in the optical and X-ray bands. We do not detect a break in the late-time light curve inferring a limit on the opening angle of [graphic] and setting tight constraints on the total energy budget of the burst of Eγ≥ 9.9 × 10(51) erg within the fireball model. To obey the fireball model closure relations, the gamma-ray burst (GRB) jet must be expanding into a homogeneous surrounding medium and likely lies behind a significant column of dust. The energy constraint we derive can be used as an observational input for models of the progenitors of long GRBs: we discuss how such high collimation-corrected energies could be accommodated with certain parameters of the standard massive star core-collapse models. We can, however, most probably rule out a magnetar progenitor for this GRB which would require 100 per cent efficiency to reach the observed total energy. |
| first_indexed | 2025-11-14T08:41:29Z |
| format | Journal Article |
| id | curtin-20.500.11937-35469 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:41:29Z |
| publishDate | 2009 |
| publisher | Oxford University Press |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-354692017-09-13T15:26:24Z Constraining the energy budget of GRB 080721 Starling, R. Rol, E. van der Horst, A. Yoon, S. Palshin, V. Ledoux, C. Page, K. Fynbo, J. Wiersema, K. Tanvir, N. Jakobsson, P. Guidorzi, C. Curran, Peter Levan, A. O’Brien, P. Osborne, J. Svinkin, D. de Ugarte Postigo, A. Oosting, T. Howarth, I. gamma-rays: bursts We follow the bright, highly energetic afterglow of Swift-discovered GRB 080721 at z= 2.591 out to 36 d or 3 × 10(6) s since the trigger in the optical and X-ray bands. We do not detect a break in the late-time light curve inferring a limit on the opening angle of [graphic] and setting tight constraints on the total energy budget of the burst of Eγ≥ 9.9 × 10(51) erg within the fireball model. To obey the fireball model closure relations, the gamma-ray burst (GRB) jet must be expanding into a homogeneous surrounding medium and likely lies behind a significant column of dust. The energy constraint we derive can be used as an observational input for models of the progenitors of long GRBs: we discuss how such high collimation-corrected energies could be accommodated with certain parameters of the standard massive star core-collapse models. We can, however, most probably rule out a magnetar progenitor for this GRB which would require 100 per cent efficiency to reach the observed total energy. 2009 Journal Article http://hdl.handle.net/20.500.11937/35469 10.1111/j.1365-2966.2009.15443.x Oxford University Press fulltext |
| spellingShingle | gamma-rays: bursts Starling, R. Rol, E. van der Horst, A. Yoon, S. Palshin, V. Ledoux, C. Page, K. Fynbo, J. Wiersema, K. Tanvir, N. Jakobsson, P. Guidorzi, C. Curran, Peter Levan, A. O’Brien, P. Osborne, J. Svinkin, D. de Ugarte Postigo, A. Oosting, T. Howarth, I. Constraining the energy budget of GRB 080721 |
| title | Constraining the energy budget of GRB 080721 |
| title_full | Constraining the energy budget of GRB 080721 |
| title_fullStr | Constraining the energy budget of GRB 080721 |
| title_full_unstemmed | Constraining the energy budget of GRB 080721 |
| title_short | Constraining the energy budget of GRB 080721 |
| title_sort | constraining the energy budget of grb 080721 |
| topic | gamma-rays: bursts |
| url | http://hdl.handle.net/20.500.11937/35469 |