The optical rebrightening of GRB100814A: an interplay of forward and reverse shocks?


De Pasquale M. , Kuin N. P. M. , Oates S., SCHULZE S., CANO Z., GUIDORZI C., ...Daha Fazla

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, cilt.449, ss.1024-1042, 2015 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 449 Konu: 1
  • Basım Tarihi: 2015
  • Doi Numarası: 10.1093/mnras/stv267
  • Dergi Adı: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
  • Sayfa Sayıları: ss.1024-1042

Özet

We present a wide data set of gamma-ray, X-ray, UV/Opt/IR (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.