The optical rebrightening of GRB100814A: an interplay of forward and reverse shocks?
- De Pasquale, M
- Kuin, NPM
- Oates, S
- Schulze, S
- Cano, Z
- Guidorzi, C
- Beardmore, A
- Evans, PA
- Uhm, ZL
- Zhang, B
- Page, M
- Kobayashi, S
- Castro-Tirado, A
- Gorosabel, J
- Sakamoto, T
- Fatkhullin, T
- Pandey, SB
- Im, M
- Chandra, P
- Frail, D
- Gao, H
- Kopač, D
- Jeon, Y
- Akerlof, C
- Huang, KY
- Pak, S
- Park, W-K
- Gomboc, A
- Melandri, A
- Zane, S
- Mundell, CG
- Saxton, CJ
- Holland, ST
- Virgili, FJ
- Urata, Y
- Steele, IA
- Bersier, D
- Tanvir, N
- Sokolov, VV
- Moskvitin, AS
DOI Publisher
Oxford University Press (OUP)Abstract
We present a wide dataset of -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 GRB100814 the best
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