1. The optical rebrightening of GRB100814A: an interplay of forward and reverse shocks?
- Author
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De Pasquale, Massimiliano, Kuin, N. P. M., Oates, S., Schulze, S., Cano, Z., Guidorzi, C., Beardmore, A., Evans, P. A., Uhm, Z. L., Zhang, B., Page, M., Kobayashi, S., Castro-Tirado, A., Gorosabel, J., Sakamoto, T., Fatkhullin, T., Pandey, S. B., Im, M., Chandra, P., Frail, D., Gao, H., Kopač, D., Jeon, Y., Akerlof, C., Huang, K. Y., Pak, S., Park, W. -K., Gomboc, A., Melandri, A., Zane, S., Mundell, C. G., Saxton, C. J., Holland, S. T., Virgili, F., Urata, Y., Bersier, I. Steele. D., Tanvir, N., Sokolov, V. V., and Moskvitin, A. S.
- Subjects
Astrophysics - High Energy Astrophysical Phenomena - Abstract
We present a wide dataset of gamma-ray, X-ray, UVOIR, and radio observations of the Swift GRB100814A. At the end of the slow decline phase of the X-ray and optical afterglow, this burst shows a sudden and prominent rebrightening in the optical band only, followed by a fast decay in both bands. The optical rebrightening also shows chromatic evolution. Such a puzzling behaviour cannot be explained by a single component model. We discuss other possible interpretations, and we find that a model that incorporates a long-lived reverse shock and forward shock fits the temporal and spectral properties of GRB100814A the best., Comment: Version resubmitted to MNRAS. 29 pages, 8 figures, 6 tables. Small changes to the abstract. Sections 3 and 4 slightly expanded and modified. Results unchanged. Section 4 has been broken into smaller subsections. Figure 6 improved. Added Table 6 with a summary of the models. Typos and references fixed
- Published
- 2013
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